TECHNICAL REPORTS SERIES No. 38

Tables

of

Thermodynamic

Data

INTERNATIONAL ATOMIC ENERGY AGENCY, VIENNA, 1964

TABLES OF THERMODYNAMIC DATA

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by writing to the International Atomic Energy Agency, Kärntner Ring 11, Vienna I, Austria.

Printed by the IAEA in Austria December 1964

TECHNICAL REPORTS SERIES No. 38

TABLES OF THERMODYNAMIC DATA

S U P P L E M E N T T O T H E R M O D Y N A M I C S O F N U C L E A R M A T E R I A L S

I A E A , V I E N N A , 1 9 6 2

I N T E R N A T I O N A L A T O M I C E N E R G Y A G E N C Y V I E N N A , 1964

I n t e r n a t i o n a l A t o m i c E n e r g y A g e n c y . T a b l e s of t h e r m o d y n a m i c d a t a . S u p p l e m e n t t o

T h e r m o d y n a m i c s of n u c l e a r m a t e r i a l s , I A E A , V i e n n a , 1 9 6 2 . V i e n n a , t h e A g e n c y , 1 9 6 4 .

95 p . ( I A E A , T e c h n i c a l r e p o r t s s e r i e s n o . 38)

5 3 6 . 7 ( 0 8 3 ) 6 2 1 . 0 3 9 . 5 3

T A B L E S O F T H E R M O D Y N A M I C D A T A , I A E A , V I E N N A , 1 9 6 4 S T I / D O C / l O / 3 8

FOREWORD

I n M a y 1962 t h e I n t e r n a t i o n a l A t o m i c E n e r g y A g e n c y h e l d a S y m p o s i u m on the T h e r m o d y n a m i c s of N u c l e a r M a t e r i a l s , t h e p r o c e e d i n g s of wh ich w e r e p u b l i s h e d b y t h e A g e n c y i n 1 9 6 2 . T h i s S y m p o s i u m r e s u l t e d i n t h e r e l e a s e of c o n s i d e r a b l e n e w d a t a on t h e t h e r m o d y n a m i c p r o p e r t i e s of m a t e r i a l s of i n t e r e s t f o r n u c l e a r t e c h n o l o g y a s w e l l a s a r e v i e w of a c o n s i d e r a b l e a m o u n t of o l d e r d a t a . T h e s e d a t a a r e s c a t t e r e d t h r o u g h o u t t h e P r o c e e d i n g s v o l u m e and a r e not r e a d i l y a c c e s s i b l e . C o n s e q u e n t l y , i t w a s c o n s i d e r e d d e s i r a b l e t h a t t h e s e d a t a b e c o l l e c t e d t o g e t h e r and c o m p i l e d i n t a b u l a r f o r m a n d t h e r e s u l t s a r e h e r e p r e s e n t e d f o r t h e u s e of s c i e n t i s t s i n n u c l e a r t e c h n o l o g y a n d o t h e r d i s c i p l i n e s .

CONTENTS

T a b l e of S y m b o l s 1

N o t e 1

Table I H e a t s of f o r m a t i o n AH£¡98, f r e e e n e r g i e s of f o r m a t i o n AG298 <

e n t r o p i e s of f o r m a t i o n AS§98 a n d s t a n d a r d e n t r o p i e s S^gs 3

Table II H e a t s of f o r m a t i o n A H ^ , f r e e e n e r g i e s of f o r m a t i o n A G x , e n t r o p i e s

of f o r m a t i o n AS ' J a n d e n t r o p i e s S-f 17

Table III

E n t h a l p y i n c r e m e n t s , f r e e e n e r g y f u n c t i o n s , a n d e n t r o p y i n c r e m e n t s 31

Table IV

E n t h a l p i e s AH, f r e e e n e r g i e s AG, a n d e n t r o p i e s AS of t r a n s i t i o n s . . 41

Table V H e a t s AH'f ' , f r e e e n e r g i e s AG^p a n d e n t r o p i e s A S ^ of r e a c t i o n 49

Table VI H e a t c a p a c i t i e s Cp 55

Table VII V a p o u r p r e s s u r e s 63

Table VIII T h e r m o d y n a m i c p r o p e r t i e s of m i x t u r e s 71

Table IX M e l t i n g p o i n t s 85

Table X D e n s i t i e s 87

Table XI S u r f a c e t e n s i o n s 89

Table XII L a t t i c e p a r a m e t e r s . 91

R e f e r e n c e s 93

TABLE OF SYMBOLS

G = G i b b s f r e e e n e r g y H = e n t h a l p y S = e n t r o p y S E , G E = e x c e s s e n e r g y , e x c e s s f r e e e n e r g y A H M = e n t h a l p y of m i x i n g AU, AH, Ala = c o r r e s p o n d i n g p a r t i a l m o l e c u l a r q u a n t i t i e s L = r e l a t i v e p a r t i a l m o l a r e n t h a l p y a = a c t i v i t y f = a c t i v i t y c o e f f i c i e n t c = c o n c e n t r a t i o n i n m o l e s / l i t r e x = m o l e f r a c t i o n T = °K u n l e s s o t h e r w i s e i n d i c a t e d p = d e n s i t y T m = m e l t i n g p o i n t t e m p e r a t u r e ( ) = g a s (( )) = l i q u i d n o p a r e n t h e s e s = s o l i d

NOTE

T h e l i s t of R e f e r e n c e s a t t h e e n d of t h i s S u p p l e m e n t h a s b e e n c o p i e d f r o m t h e C o n t e n t s of T h e r m o d y n a m i c s of N u c l e a r M a t e r i a l s , I A E A , V i e n n a 1 9 6 2 . T h e p a p e r s h a v e b e e n n u m b e r e d t o c o r r e s p o n d t o t h o s e g i v e n i n t h e R e f e r e n c e c o l u m n s of t h e T a b l e s of t h i s S u p p l e m e n t . S o m e t i m e s t h e p a p e r n u m b e r i s f o l l o w e d b y a n u m b e r i n s q u a r e b r a c k e t s ( i . e . 1 [9], 23 [22]) a n d t h i s i n d i c a t e s a r e f e r e n c e c i t e d b y t h e a u t h o r i n a l i s t of r e f e r e n c e s g i v e n a t t h e e n d of h i s p a p e r .

1

TABLE I

HEATS OF FORMATION AH§9 8 , FREE ENERGIES OF FORMATION AGÍ].», ENTROPIES OF FORMATION AS§98 AND STANDARD ENTROPIES S298

Substance AHj»,

( k c a l / m o l e ) Ref. AG298

( k c a l / m o l e ) Ref.

(e . u. /mo le ) Ref.

» S® 298 ( e . u. / m o l e )

Ref.

A c t i n i d e - m e t a l c h a l c o g e n i d e s *

- S 3. 0 1

- s , . s 5 . 0

-Si.«7 6. 0

- S i . , 7. 0

8 . 0

- S ! . 5 12

- s , 16

- S e 1. 0 1

"Sei.33 9 . 3

- S e , . s 1 0 . 5

- S e , . , , 11. 7

- S e , . , 14

- S e , 15

20

- S e , 25

- T e 9. 5 1

- T e , j3 12. 6

- T = i . s 14. 3

- T e , 19. 0

- T e 2 . 5 23. 8

-T<=3 28. 5

* an ion ic contr ibut ions only

Substance ( kcal/mole)

Ref. (kcal /mole)

Ref. (e . u. /mole)

Ref. (e . u. /mole)

Ref.

AcO, 5 (hex) - latt :( 16. 0), mag : (0)

(16.0)

1

Ag 8. 99 16

A 1 A -48. 6 i 10 9 [1]

AmO (cubic) la t t : ( 13. 0). mag : (4 . 2)

(17.2)

1

<hex> AmO, . 1 , 5 (cubic)

la t t : (15 . 0 ) . m a g : ( 3 . 9)

(18 .9)

1

ArnOj (cubic) lat t : ( 17. 0 ) . m a g : ( 3 . 6)

(20. 6)

1

AmO; ( 20. 0) 1

BN - 6 0 . 3 ± 0 . 7

-59. 6 1 0. 7

9 [15]

9

B„C -13. 8 i 2. 7 9 [2]

Ba3Bi2 - 1 2 8 . 1 20 [30]

Bk02 ( cubic) latt :( 17. 0), mag : (4 . 2)

(21.2)

1

BkOj (20. 6) 1

(CO) -26. 42 30 [28]

(CM) — 92

109

109 .5

28

28 28 [12]

(CHjCN) - 1 9 . 8 28

Ce lat t . +c.e. ¡(13.22), mag :( 3.56)

16 .68 1 [65]

1 [67,69]

C e 0 1 s ( hex) -217 .46 1 [88] (-207. 0) 1 ( -35. 2) 1 la t t : (14. 65), mag: (3 . 56)

(18.2)

1

CeO, 6 T(bcc) (-233) 1 ( -221) 1 ( -40. 3) 1 •

la t t : ( 14. 7), mag: (2 . 5)

(17.2)

1

CeO, „ ( r h ) ( -238) 1 (-255) 1 ( -42 . 4) 1 latt :( 14. 7), mag :( 1 .8)

(16 .5 )

1

C e O , „ ( r h ) (-244) 1 (-231) 1 ( -44 . 1) 1 lat t : (14. 7), m a g : ( l . 5)

(16 .2) '

1

C e 0 1 B 1 ( r h ) ( -247) 1 (-234) 1 (-44. 8) 1 la t t : (14. 7). m a g : ( l . 5) (16 .2)

1

CeOj (bcc) -260. 18 i 0. 16 1 [90] - 2 4 5 . 0 1 - 5 0 . 8 0 1 [62] la t t : (14 . 7) (14 .7)

/

CfOz (cubic) la t t : (17, 0). mag:(3 . 9) (20, 9)

1

CK), (20. 3) 1

C m 0 1 5 (cubic) la t t : (15 . 0). mag: (4 . 2) (19.2)

1

CmOj (cubic) la t t : (17 . 0), mag: (3 . 9) (20. 9)

1

CmOj (20 .3) 1

CrB C l : (10 .2) , B : ( - 1 . 8 ) (8. 4 i l )

45

CrB2 Cr: (10. 2), B: ( - 3 . 6) (6. 6 ± 1)

45

Dy lat t .+c.e. : (12.29),mag:(5.51) 17 .87

1 [65] 1 [77]

DyO, s ( b c c ) -222. 92± 0.47 1 [98] ( -212 .3) 1 ( -35 .7) 1 la t t : (13. 55), mag:(5 . 51) (19. 05)

1

Er latt. +c.e.:( 12.11), mag : (5 . 51) 17 .52

1 [65]

EtOj j ( b c c ) -226 .80 ± 0 . 2 3 1 [100] ( -216 .2) 1 ( -35 .5 ) l a n :(13. 3), mag :(5. 51) (18. 8)

1

Eu mag : (4 .13 ) (17 .0)

1 [70]

EuO la r t : (12 .1) , mag:(4 . 2) (16 .3) 1

EuO, 5 (m) ( -217. 0) 1 (-206) 1 (-36) 1 latt :( 14. 05) (17 .5) 1

Gd la t t .+c .e :(12.5), mag:(4 .1) 15 .77

1 [65] 1 [73, 74]

GdOj s (m) -216. 97 ± 0. 43 -216. 97

1 [96] 23 [5. 6]

( -206. 7) 1 ( -34 .4 ) 1 lat t : ( 14. 0). mag: (4 . 13) (18 .15)

18. 0 18 .0

1

1 [64] 23 [22]

HfB; Hf:(14. 8). B: ( -3 . 6) (11. 2 i l )

45

Substance AH,1,,

(kcal /mole) Ref.

AG0 298

( kcal/mole) Ref.

(e . u. /mole) Ref.

S° 298 (e . u. /mole)

Ref.

Ho \ \

latt . + c .e . :( 12.18), mag :( 5.63) 18. 00

1 [65] 1 [78]

HoO, s (bcc) -224. 78 tO . 58 ' 1 [99] ( -214. 1) 1 ( -35. 7) 1

HoO, 5 la t t : (13. 45), mag :(5. 63)

(19 .1) 1 8 . 9

1

1 [64]

La latt. + c . e . : (13.35) 13. 64

1 [65] 1 [67, 68]

(LaO) electronic : 2. 75 23

LaO, 5 (hex) -214. 2 9 1 0 . 19 -214. 28

1 [82] 23 [5. 6]

-203. 80 1 -35. 18 1 [103] la t t : (15. 2), mag : (0 ) (15 .2) 15. 21 15. "29 15. 3

1 1 [64] 1 [63]

23 [22]

Lu lat t .+c.e. :(11.79). mag : (0 ) 12. 19

1 [65] 1 [66]

(LuO) e lec t ronic : 0. 8 23

LuO, g (bcc) - 2 2 4 . 5 ± 0. 9 - 2 2 4 . 4 5

1 [102] 23 [5, 6]

( -213. 9) 1 ( -35. 6) 1 lar t : (13. 0), mag : (0 ) (13.0) (15. 3)

1

23

Mg,Ca -8. 4 i 6 -6 . 9± 2. 4 - 6 to - 9

-13. 2

15 15 15 [12] 15 [13]

MgNi, -13. 2 ± 1 . 5 -10. 2± 5 .4 -18. 6 -17. 1 - 1 1 . 7 -13. 89 ±0 . 27

15 15 15 [11] 15 [13] 15 15

-2. 64 -1 . 8

15

MgjNi -15. 9 ± 2 . 1 - 1 4 . 4

- 3

15 15 [11] 15 [13]

MgY -5 . 6±1 . 6 - 5 . 2

15 15 [13]

MSsY!

MgCu2

M g î Cu

Mo,B

NbC

NbC„

NdO, s (hex)

- 2 1 . 7 4 7 -20. 3 ±12- 6

-46. 0120 . 0 -52. 0140 . 0

- 5 . 4 1 1 . 2 -12.0

- 3 . 9 1 1 . 8 -1.8

I. 60-70 . 95 x + +30. 75 x'

-216. 810. 12 -216 .57

15 15

15 15

15 [13]

15 15 [13]

9 [5]

9 [7]

1 [92] 23 [5, 6]

( -205 .6)

NpO (cubic)

NpOj (cubic)

NpOj_Ç7(orthorh)

(O,) PaO (cubic)

Mo:(24. 6), B : ( - l . 8) (22.812)

Mo:(12. 3). B : ( - l . 8) (10. 5 1 1 )

Mo:(12. 3), B:(-3. 6) ( 8 . 7 1 1 )

Nb:(12. 2), B:(-3. 6) (8.611)

lat t .+c.e. :(12.96),mag :(4.58) 1 [65] (17.54) I [67]

la t t : (14 .45) , mag: (4 . 57) (19.0) 1 (18. 46) 1 [63] 18. 95 1 [64] 18. 95 23 [22]

late :( 13. 0), mag :(3. 6) [ 1 . (16.6)

la t t : ( 17. 0). mag: (2 . 8) (19. 8) 19. 1 9 1 0 . 1

latt : (22.0) . m a g : ( l . 9) I 1 (23. 9) 4 9 . 0 1 j 1 [42]

lat t : (13. 0 ) ,mag : (2 . 8) (15. 8)

co

Substance (kcal/mole)

Ref. ( kcal/mole)

Ref. (e . u. /mole)

Ref. S 298 ( e. u. /mole)

Ref.

Pa02 (cubic) larr:(17. 0), mag.-(l . 4) (18.4)

17. 8

1

1

Pa0 2 3 (cubic ) la t t : (19 . 0), mag : (0 . 5) (19. 5)

1

a - PaC^ g (cubic) ß - P a 0 2 g(orthorh) } la t t : (21. 0). mag: (0)

(21.0) 1

Pm latt .+c. e.:(12. 88) ,mag:(4.37) (17. 2)

1 [65] 1 [70]

P m 0 1 5 ( - 2 1 6 . 5 ) 1 (-206) 1 ( - 3 5 . 4 ) 1 m a g : ( 4 . 36) 1

Pr la t t : ( 13. 09), mag : (4 . 37) 17 .49

1 [65] 1 [67]

PrO, ,s (hex) PrO, 5 (bcc )

-217. 9± 0. 8 -218. 9± 0. 8

1 [91] 1 [91]

(-207. 4) (-207. 8)

1 1 j - ( - 3 5 . 4 ) 1

lat t : ( 14. 6), mag :(4. 36) (18. 95)

1

»Ol.TO / latt :( 15. 1), mag(4. 0) (19 .1 )

1

PrO, 7 (bcc) - 2 2 3 . 5 1 0 . 8 1 [91] (-211. 5) 1 ( -40 . 1) 1

PrO, 7(rh) (- 225) 1 (-212. 8) 1 ( -40. 9) 1

P r 0 1 M la t t : (15. 2), magr(4 . 0) (19. 2)

1

PrO, a (bcc ) -227. 6 1 0. 8 1 [91] (-214. 7) 1 ( - 4 3 . 2 ) 1

la t t : (15. 3), mag : (3 . 8) (19.1)

1

Pr02 (bcc) -232. 9 1 [91] (-218. 8) 1 ( - 4 7 . 4 ) 1

Pr02 la t t : (15. 6), mag :(3. 5) (19.1)

1

Pu (12. 3) 33 [39]

PuO (cubic) la t t : (13. 0), mag :(3. 9) (16. 9)

1

PuO, g (hex) la t t : (15. 0), mag: (3 . 6) (18. 6)

1

PuO, 6 (cubic) la t t : (16. 0), mag :(3. 5) (19 .5)

1

Pu0 2{ cubic) l a t t : (17 , 0). m a g : ( 3 . 2)

(20. 2)

( 1 9 . 7 )

1 6 . 3

1

1

1 [57]

PuN -95 33 [42]

PuCQ i J , 3. 7 ±3. 1 33 2. 5 33 4 33 17 33

P"C0.8S ( 2. 5 ± 3) 33

PuC ( -25) 33 [24]

Pu,C, -1 . 7 33 ( - 2 . 6 ) 33 - 3 33 25 33

PuH, - 3 7 . 4 33 [43]

Sc mag : (0 )

( 8 . 5 ) 1

ScO, 5 (bcc) -228. 0± 0 . 3 1 [80] - 2 1 7 . 4 1 ( -35 . 6) 1 l a t t : (9 . 7), ma g : (0 )

( 9 . 7 )

1

SiO¡ (cx-quartz) - 2 0 9 . 9

-217, 5 ± 0 . 5

-217. 75 ± 0 . 3 4

9 [10]

9 [11]

9 [12]

SiC - 1 3 . 4 ± 1 9 [3]

Sm la t t .+c .e . : (12 .76) , m a g : ( 3 . 56)

16. 64 1 [65]

1 [71 ,72 ]

SmO la t t : (12 . 2). m a g : ( 3 . 5)

( 1 5 . 7 )

1

SrnO 5 (monocl) -216. 95 ±0 . 24 1 [94] ( -206. 4) 1 ' ( - 3 5 . 4 ) 1 18. 05 23 [22]

S m 0 1 5 -216. 95 23 [5. 6] • -

l a t t : (14 . 1 5 ) . m a g : (3 .56 )

( 1 7 . 7 )

18. 05

1

1 [64]

TaC -38. 5 ± 0 . 6 9 [6]

TaB T a : ( 1 4 . 9 ) , B : ( - 1 . 8 )

(13. 1± 1)

45

TaB, Ta :( 14. 9 ) r B : ( - 3 . 6 )

(11. 3± 1)

45

Tb l a t t : (12 . 40), m a g : ( 5 . 10)

1 7 . 4 8 1 [65]

1 [74.75,76]

TbO e l ec t ron i c : 4. 6 23

TbO ( 5 (bcc) - 2 1 8 . 4 ± 1. 0 1 [9] ( -207 . 7) 1 ( -35 . 8) 1 l a t t : (13 . 65), m a g : ( 5 . 09)

(18.75)

1

Substance ' AH°

298 ( kcai/mole)

Ref. AG° 298

( kcal/mole) Ref.

AS0

298 (e, u. /mole)

Ref. SO

298 ( e. u. /mole)

Ref.

TbO, , 2 ( rh) -223. 3 ± 1 . 0 1 [97] (-211. 2) 1 ( - 4 0 . 4 ) 1 latt :( 14. 8), mag: (4 . S) (19 .3)

1

TbO, „ ( t r i ) - 2 2 6 . 4 1 1 . 0 1 [97] (-213. 8) 1 ( - 4 2 . 4 ) 1 látt :( 15.1) , mag :(4. 3) (19.4)

1

T b O , ( b c c ) ( -231) 1 ( -217) 1 ( - 4 6 . 7 ) 1 la t t : (15. 8), mag: (4 . 0) (19. 8)

1

ThO (cubic) latt :( 13. 0 ) ,mag : (2 . 0) (15 .0)

1

T h 0 2 -293. 2± 0 .4

-293. 2

24 [6]

30 [27]

15. 5 9 1 0. 02 1

T h 0 2 (cubic) lat t¡(17. O).mag.-(O) (17. 0)

1

Th3N4 -308 33 [40] -

ThS (cubic) l a t t : (18. 0) 1

ThS t 5 ( orthorh) la t t : ( 20. 0) 1

ThS1 T(hex) - l a t t : (21. 0) 1

ThS2 (orthorh) l a t t : (23. 0) 1

ThS2 5 ( te t r ) l a t t : (27. 0)

ThSe (cubic) l a t t : (22. 0) 1

ThSe, s (orthorh) l a t t : (25. 5) 1

ThSe, T (hex) la t t : (27 .0) 1

ThSe2 (orthorh) l a t t : (30. 0) 1

ThSe2 5 (tetr) l a t t : (35. 0) 1

ThTe (cubic) la t t : (24. 5) 1

ThTe, i S (hex) l a t t : (29. 3) 1

ThTe, , (hex) la t t : (33. 0) 1

ThTe; (hex) la t t : (34. 0) 1

ThTe j (monocl) l a t t : (43. 5) 1

ThC 0 M - 7 1 6 33

ThC -7 ± 6 ( - 3 0 1 8)

33

33 [20]

-6. 4± 6 33 - 2

( - 3 . 7 1 1 . 5)

33

33 [20]

12 33

• T h Q - 2 3 . 7 4 3 . 5 -19. 745 . 2 - 4 8 . 1 * 2 . 0 -48. 6± 2. 5 -44. 8 -78. 9 -45. 7 - 334 8 -31. 0 (•45.6)

30

33 [21] 33 [22] 33 [20] 33 34 [33]

-32. 8 4 8. 0 - 3 2 . 5

33 [20] 33

4. 0 33 15. 1 4 3 19 .6

30 [22] 33

TiC -43. 85 4 0. 4 9 [4]

TiB,

Tm

TmOi . s íbcc ) -225 .7 4 0 .7 1[101] (-215. 1) 1 ( - 3 5 . 7 ) 1

T i : (9. 8), B:(-3. 6) (6. 2 4 1 )

lart .+c.e. :(12. 00). mag:(5.10) 17. 37

la t t : (13 . 15), mag : (5 . 10) (18. 25)

46

1 [65] 1 [79]

1

U 12. 00 IUI] (U) 4 8 . 1 4 3. 5

47. 7 4 4 [24]

UO (cubic) latt :( 13. 0), mag :(3. 2) (16.2) 1

UOJ+aq -20 4 [18]

u o 2 -259 .5 • - 2 5 9 . 2 4 0. 6

1 40 [25]

-246. 9 1 -42. 38 1 18 .63 18. 63 4 1

I C I ] 1

U0 2 (cubic) la t t : (17 . 0), mag: (1 . 9) (18.9)

1

U0 2 . 2 5 - 2 6 9 . 0 4 1 -269 .7 4 1. 1 - 2 6 9 . 8 -271 .6

' -270 -267. 6 -265 .2

40 40

40 [26]

1 1 1

-256 - 2 1 0 . 7 -210. 6

1 1 1

-47. 07 -43. 8 -42. 1

1 1 1

20. 07 1

U0 2 2 5(cubic) latt :( 18.0). m a g : ( l . 7) (19. 7)

1

U0 2 . 3 J -271 .9 4 0. 8 -273 .7 4 0 .7 1«

Substance ( k c a l / m o l e )

Ref. AG 0 298

( k c a l / m o l e ) Ref.

AS 0 298 ( e . u, /mole )

Ref. SO 298

( e . u. /mo le ) Ref.

a-U02 jj ( -273) • 1 ( -258) 1 -49 . 46 1 19. 73 1

8 - U < \ 3 J ( -273) 1 ( -258) 1 - 4 9 . 23 1 19. 96 1

a - , ß - U O z 33 (tetr) l a t t : ( 19. 0). m a g : ( l . 5)

(20 .5 )

1

- 2 8 4 . 5 40 - 2 6 8 . 5 1 -54 . 82 1 22. 51 1 - 2 8 4 . 8 -284. 5 ± 0 . 5 -285 . 5 ±1 . 0 -284 . 8

1

1 [36] 1 [37] 1 [47,43

- 2 6 8 . 0 -268 . 5

1 [35] 1 [47 ,48 ]

- 5 4 . 8 1 [ 4 7 . 4 8 ]

-

U 0 2 6 7(or thorh) l a t t : (22 . 0), m a g : ( 0 . 7) (22. 7)

1

U 0 3 (amorph) - 2 9 0 . 4 - 2 9 0 . 8 - 2 9 2 . 5 - 2 9 2 . 3 -293. 8 -290. 0± 1. 0

j- 4 C3]

J 4 [4]

4

7-UO3 291. 6 < -AH <293. 0 292. 6 < - A H <293. 0

- 2 9 3 ± 1 . 0 -304. 5 ±3 . 5

4 4

4 4 [2]

UO3 (hex) la t t :( 23. 0). m a g : ( 0 ) (23. 0)

1

y-U03 ( h e x ) -294 1 [43] - 2 7 5 . 5 1 - 6 1 . 9 5 1 23. 57 1

US -87 1 - 1 . 0 ' 1 [132] 1 8 . 6 3 1 [112]

US (cubic) la t t :( 18. 0), m a g : ( 2 . 4) (20.4)

1

US, 5 ( cubic) - 1 1 2 1 la t t : (20 . 0 ) , m a g : ( 2 . 0) 1

US, 5 ( cubic) (22. 0) 1

US J 61 (orthorh) l a t t : (21 . 0), m a g : ( 2 . 3) (23. 3) 1

US, 9 ( l e t r ) l a t t : (22 . 0 ) , m a g : ( 2 . 2) (24. 2) 1

US2 (orthorh) -120 1 ' -0. 8 1 [132] 26. 42 lat t : (23. 0 ) ,mag : (2 . 3)

(25. 3)

1 [22]

1

US3 (monocl) -121 1 -1. 8 1 [132] 33. 08 la t t : (31. 0), mag: (2 . 1)

(33. 1)

1 [22]

I

USe (cubic) lat t : (22. 0), mag: (2 . 4) (24. 4)

1

USe , 33 (cubic) l a t t : (24. 3), mag: (2 . 4) (26. 7)

1

USe 1 5(orthorh) lat t : (25. 5), mag: (2 . 4) (27. 9)

1

USe i 67( orthorh) lat t : (26. 6), mag: (2 . 4) (29. 0)

1

USe , 9( tetr) la t t : (29. 0). mag: (2 . 3) (31.3)

1

USe 3(monocl) lat t : (40. 9), mag :(2. 3) (42. 3)

1

UTe (cubic) la t t : (24 5), mag: (2 . 2) (26. 7)

1

UTe, 33 (cubic) la t t : (27. 7), mag: (2 . 4) (30.1)

1

U T e , s l a t t : (29 .2) , mag : (2 . 5) (31.7)

1

U T e , lat t : (34. 0). mag: (2 . 2) (36. 2)

1

U T e , . s la t t : (38. 8), mag: (2 . 2) " (41. 0)

1

UTe j (monocl) lat t : (43. 5). mag: (2 . 2) (45. 7)

1

UN - 6 8 . 5 33 [41] (13) 37

U,N3 29. 27 37

UC -21. 0 -22. 3 -21. 0±1 . 0 -20 ± 5 -28 ± 6 - 20. 8 ± 0. 9

32[22] 32 33 [23] 33 [24] 33 [20] 33

-20. 1 ± 0 . 9 - 2 0 . 1 7 ± 1 . 0 -18. 9

33 33 14 [6]

( - 1 . 5 * 1 . 5) ( - 0 . 6 ) -2 . 1

33 [20] 33 [11] 33

11. 3 33

Substance AH»*

(kcalAnole) Ref. ( kcalAnole) Ref.

A S ° J ! (e . u. Anole)

Ref. c0 298

(e . u. Anole) Ref.

U2CS -49 ± 4 ( - 4 6 1 7 )

33 33 [20]

-48 ± 4 - 4 8 . 0

33 33

( - 1 . 0 1 3 . 0) - 3

33 [20] 33

25 33

u c , . „ 4 7 1 2 31

u c . , 8 «

u c 2

- 1 8 1 4 - 2 7 1 8 -30

33 33 [20] 33 [11]

- 1 9 1 4

-41. 1

33

14 [6]

4

(2. 8± 3. 0) ( - 1 . 9 )

33

33 [20] 33 [11]

(19) 33 [18]

U3Si2 -40 . 7 à 0 . 5 37

USi - 1 9 . 2 1 0 . 3 -21. 3 -20. 4

j - 37

USi2 - 3 1 . 1 1 0 . 3 - 3 0 . 7 -30. 6

j - 37

USi, -31. 6 ± 0 . 1 -31. 2 -30. 5

i " 37

UH, -30. 3 ±0. 1 - 3 1 . 4 1 0 . 3 -30. 6 ca

cc co

U / e

UFe2

( - 9 . 5 )

( -14. 5)

13 [8]

13 [8]

u z " - „ w c

-54. 2

- 8 . 4 1 0 . 2

18

9 [8]

w2b

wb

W :(30. 0). B: ( -9 . 0) ( 2 8 . 2 1 2 )

W .-(15. 0), B.-(-l. 8) ( 1 3 . 2 1 1 )

45

45

w 2 bs

W :(30. 0)-, B : ( - l . 8) ( 2 1 1 2 )

45

y m a g : (0) 10. 63 1 [66]

r o 1 5 ( b c c ) -227. 77 -227. 37 ± 0 . 2 7

23 [5, 6] 1 [81]

( -217 . 1)

YH2 YD2 Yb

YbOj s ( b o c ) -216. 84 ±0. 27 ( -206.

ZrC

ZrB

9 [5]

ZrH z ZrD

- 3 5 . 5 4

( -34 . 5)

latf :(12. 45), mag: (0) (11. 2) 11. 84 1 1 . 8 5

9. 175 ± 0. 018

10. 294 ± 0. 021

m a g : (0) (15 .0)

la t t : ( 13. 1), mag : (4 . 13) (17..2) 15! 9

Zr : (12. 1). B :( -3 . 6) (8. 5 ± 1)

8. 374 ±0 . 02

9 .168 ± 0 . 0 2

TABLE II

H E A T S O F F O R M A T I O N AHÍ}., F R E E E N E R G I E S

O F F O R M A T I O N A G £ , E N T R O P I E S O F F O R M A T I O N A S f A N D

E N T R O P I E S A T T E M P E R A T U R E S O T H E R T H A N 2 9 8 ° K

Substance T

AH°t =a + bT + cT2+dT (kcal/mole)

+ eT_1

Ref. T AG °y = a + bT + cT2 +dT3 +

(kcal/mole) C K )

Ref. ( ° K )

a bX103 CX 10s dxlO9 eXIO"2 a bX103 CX106

(Ag) 1085-1230 -62.70 16 BaCl2 773 -174.7 CeCl3 673

673 773 773 773 873 873

-211.26 -214.2 -206.58 -208.8 -206.6 -202.02 -203.4

CsCl 773 - 88.3 (Gd)

(GdO) 0 -18.6±7.0 23 '' ' •

GdO,.5

GdC2 2044 2044

-27.80±2.1 -23.8 ±1.3

30 30

(IrOj) 1580 4.65 25 [6] (U)

LaClj 773 -209.9 (LaO) 0 -27.9 ±5.0 23 (LaO)

LaO, 5 (hex) 0 -213.5 23

(Lu)

(LuO)

(LuO) 0 - 5.3±7.0 23 LuO, j (hex) 0 -223.75 23

18

t- eT + fT log T

(kcal/mole)

dx 10s ex 10"2 fxl0J

Ref. T CK)

AS°j = a + bT + cTz

(e.u./mole)

bxiO3 cXlo6 Ref. T S 'p

(°K) / e . u . \ Ref. (°K) \mole J Ref.

2000 58.2 23[19] 2500 59.7 23 [19]

1800 75.1 23 2000 75.0 2200 75.9 2500 76.9

2000 47.2 23 2500 51.2 23

2000 56.5 23 [19] 2500 58.2 23 [19]

1800 73.9 23 2000 74.8 2200 75.6 2500 76.8

2000 44.5 23 [ 18] 2500 48.5 23 [ 18]

2000 55.1 23 [19] 2500 56.5 23 [19]

1800 72.5 23 2000 73.4 2200 ,74.3 2500 75.3

1085-1230 15.73 16

20[19]

11 11[14] 11 11[14] 20[17] 11

11[14]

20 [19]

1580 -10.21 25 [6]

20[18]

19

Substance T

AH°X = a + bT + cT2 + dT (kcal/mole)

teT"1

Ref. T

AG°T = a + bT + cT2 +dT3 +

(kcal/mole) Substance CK)

a bxio3 cXlO6 dxlO9 eXlO"2

Ref. CK) a bXIO3 ex 1 0 6

MgCJ2 673 723 773 773 673 723 773

-127.80 -126.18 -124.56 -124.6 -127.30 -125. 58 -123.92

Mg fia - 8.4 1.2

Mg„Y3 - 46 8

Mg5Y2 - 21.7 2.8

MgY - 5.6 - 0.2

Mg2Ni - 15.9 6.0

MgNiz - 12.39 -14.49 -0.909

Mg2Cu - 3.9 - 6.9

MgCu2 - 34.59 -17.43 -2.001 (Nd)

NdCl3 773 -199.8

(NdO) 0 -31.2 ±7.0 23

(NdO)

NdOj.5 0 -215.7 23

(Pu) 1392-1 1793 J

80.5 -22.94

(PuO) 1700- lv 2 0 0 0 J

- 20.6

- 20.8

-18.4

-15.4

Pu203 -393 63

(Pu02) ~1800 (-122) ( 5) Pu02 1000-)

1500 J -251.6 40.25 1

20

•eT-' + fT log T

(kcal/mo le)

dXIO9 exio-2 fx 103

Ref. T (°K)

AS"t = a + bT + cT2

(e. ü./mole)

bxlO3 :X 106

Ref. T CK)

T e. u

\mole Ref.

•0.39

-0.39

5.22

11 ' 11 11 20 [19] 11 [3] 11 [3] 11 [3]

15

15

15

15

15

15

5.28

20 [17]

24 [41]

24 [29, 35,37]

24

24 [38,39]

24

24 [35]

300 400 500 300 400 500

2000 2500

1800 2000 2200 2500

2000 2500

-0.90 -1.17 -1.54 -0.6 -0.9 -1.1

57.4 58.8

76.9 77.8 78.7 79.7

49.95 54.05

23 [ 19] 23 [19]

21

Substance T

AH°X =a + bT + cT2 +dT3 teT"1

(kcal/mole) Ref.

T AG°j = a + bT + cT2 + dT3+

(kcal/mole) Substance CK) a bxiO3 cXIO6 dX109 eXIO"2

Ref. CK) a bx io3 cXIO6

puC0.77 1000 2000

- 0.3 - 4.3

Pu2C3 1000 2000

- 5.6 - 8.6

(Sm)

SmClj 773 -168.0 (Sm O) 0 -24.0 ±7.0 23

0 -216.1 23

(Th) 1757-1956

131.7 -27.41

ThCl4 673 773 873 673 773 873

-232.4 -224.4 -216.8 -234.4 -227.2 -220.0

(ThO) 2200-3000

- 10.3 -14.4

(ThOj) 2200-3000

-137.3 11.1

ThO 2 2000-3000

-296.0 46.4

ThC - 7.0 2 ThC 2 2300-2900

1073

-46 ±6

-37.4

34

34 [22]

1070 1000 2000

- 36.4 - 36.0 - 41.0 - 45.0 2.6

(U) .1630-1970

106.76 -26.09

UBi 1018-1115 -24.640i0.74 19 1018 1041 1064 1089 1115

-15.718 -15.460 -15.300 -15.100 -14.800

± 0.74

U3Bi4 1018-1115 -79.8 ±1.96 19 1018 -54.95

22

+ éT"1 + fT. log T

(kcal/mole) Ref. T CK)

AS°f = a + bT + cT2

(e. u./mole) Ref. T

fK) S°T u \

•

Ref.

d X10s eXIO"2 fx 103

Ref. T CK)

a bX'103 , cX -106

Ref. T fK) Uno le J

•

Ref.

•

•

33... ; 33 ...

33 33

20[20]

24[13]

11 11 ' 11 11 [14] 11 [14] 11[14] 24[3]'

24 [3]

24 [6,7, 8,45]

33 :

33[34] 33 33 14 [6,10]

24 [28]

19

19

1018-1115

1018-1115

- 8.80

-35.7

1

19

19

2000 2500

1800 2000 2200 2500

2000 2500

57.4 58.7

77.5 78.4 79.3 80.3

48.3 53.15

23 [ 19] 23 [19]

23 23 23 23 .

23 23

23

Substance

UBi,

UC13

(UO)

UO,

(UO,)

UO,

UO,

UO,

T ( *K)

1018-1115

1300

1300 -267.5

298.15 -284.8 400 -284.4 500 -284.0 600 -283.5 700 -283.1 800 -282.7 900 -282.4 935(a) -282.3 935(8) -282.9

1000 (-282.7) 1045(6) (-282.5) 1045(y) (-283.7) 1100 (-283.4) 1200 (-282.9) 1300 (-282.4)

AH°t = a + bT + cT2 + dT3 + eT"1

(kcal/mole)

-34.2 ±0.84

-258.7

bx 103 cXIO6 dxio9 :X10"2

\

Ref.

19

1

1 [47,48]

T CK)

AG°T=a + bT + cT2+dT3 +

(kcal/mole)

1041 -53.69 1064 -52 85 1089 -52 08 1115 -51 10

i 2 52

1018 -19.41 1041 -18.99 1064 -18. 75 1089 -18 30 1115 -17 94

i 0.84 673 -168 2 773 -163 1 873 -158 5 673 -178 2 773 -173 1 873 -168.0

1900- - 16 8 2500

1300 -206 2 -258.65

300-1500 -258 65

1600- -121 52 2400

1300 . -211 5

298 -268 5 400 -262 9 500 -257 6 600 -252 4 700 -247 2 800 -242 1 900 -237 2 935(a) -235 4 935(0) -235 4

1000 (-232 0) 1045(0) (-229.7) 1045(y) (-229.7) 1100 (-226.9) 1200 (-221 8) 1300 (-216 7)

-285 36 1230- -198.5 1700

bxio3

-10

40.64

40.64

4.24

76.93 19

cXIO6

24

+ eT- ' t fT log T

(kcal/mole) Ref. T (•K)

AS°t = a + bT + cT2 (e.u./mole)

Ref. T CK)

S T f e . u A ^mole J

Ref.

dX109 ex 10"2 fx io 3

Ref. T (•K)

a bXlO3 cXIO6

Ref. T CK)

S T f e . u A ^mole J

Ref.

• .

-7.73

19 ,

11 11 11 11[14] 11 [14] 11 [14]

24 [11,22 23]

1 25[17]

24 [29]

24[24,29]

1

1 [47,48]

25 [16]

24 [22, 25]

1018-1115

1300

1300

298 400 500 600 700 800 900 935(a) 935(6)

1000 1045(6) 1045 (y) 1100 1200 1300

-14.7

-40.35

-43.1

-54.8 -53.7 -52.7 -51.9 -51.7 -50.7 -50.3 -50.2 -50.8

(-50.7) (-50.5) (-51.6) (-51.4) (-50.9) (-50.5)

19

1

1

1 [47, 48]

25

AH°t =a+bT+cT2+dTs + eT"l AG°T = a + bT + cT2+dT3 +

Substance T Ref. T (kcal/molel Substance (•K) Ref. CK) (•K)

a bx 10s cXIO6 d X10« ex 10 ~2 CK)

a bX103 cXIO6

US

(US)

UC 298-935

935-1045

-20.5

-18.24

0.5

-6.3

0.5

4.5

-1.40

-2.1

33

33

298-935 935-

1045

-20.500

-18.24

4.9

-40.2

-0.5

-4.5

1045-1405 -20.37 -5.3 4.5 -2.1 33 1045-1405

-20.370 -31.2 -4.5

> 1405 -23.57 -5.3 4.5 -2.1 33 >1405 -23.570 -28.9 -4.5 UC 298-

1800 20.8 1.3

2050 -25.2 uc2 2300

2300

2300

-23 -26

-51 ;

31 31 [8]

31

2000-2100 !

~2000

-51.4 -32.6

18±4

6.02 3.6

3.7 UQ fin equi-librium with graphite)

1073 -22.Oi 1.8

USn3 723

636-950

-40.8

-39.18 -3.062

18

18

636-950

-39.18 - 9.502 3.062

UPb3 723 648-1227

- 20.9 -23.46 18.99 -19.45

18 18 648-

1277 -23.46 21.61 -18.99

UGa3 643-1013 -59.28 84.36 -69.30 18 643-1013

-59.28 82.15 -84.36

UIn3 626-949 -24.28 -3.875 18 626-949

-24.28 7.439 3.875

UT13 658-946 -12.00 -2.208 18 658-946

-12.00 8.498 2.208

uzn^,i2 699-975 -54.15 18 699-975

-54.15 38.22

UCdn 573-746 -27.30 18 573-746

-27.30 36.40

u h 3

26

+ eT _1+ fT log T

(kcal/ mole) Ref. T CK)

AS" t -a + bT + cT2

(e. u. /mole) Ref. T

CK) Ref.

+ eT _1+ fT log T

(kcal/ mole) Ref. T CK)

a bX103 CX106 Ref. T

CK) Ref.

dX109 eXlO'2 fxio3 Ref. T

CK) a bX103 CX106

Ref. T CK) 1moley

Ref.

2300 45.08 27

2300 83.44 27

-0.7 - 1.15 33

-1.05 14.5 33

-1.05 12.2 33

-1.05 12.2 33

33

33

31 32

33

19

18 723 -13.9 18

636-950 -9.502 -6.124 18

9.723 18 648-1227 -21.61 37. 98 -29.17 18

34.65 18 643-1013 -82.15 168.7 -104.0 18

18 626-949 7.439 -7.750 18

18 658-946 -8.498 -4.416 18

18 699-975 -38.22 18

18 573-746 -36.40 18

700 29.59 8 [16] 800 32.39 8 [16] 900 34.93 8 [16]

700 29.62 8 800 32.32 8 900 34.80 8

27

Substance T CK)

AH°t = a +bT + cT2 -KiT' + eT-1

bXIO3 CXIO6 dX10® eXlO"2

Ref. T CK)

AG°j = a+ bT + cT 2+dT3 +

(kcal/mole)

bXIO3 cXIO6

m

( Y O )

( Y O )

Y O ls'

YHT

- 5 . 0 1 5 . 0

- 2 2 6 . 8

Y D ,

(ZR)

ZrH,

1 5 4 0 - 1 7 6 3 - 5 0 . 5 1

ZrD,

23

23

16

* Values for other temperatures are given in the text.

28

+ eT"I+fT log T

(kcal/ mole)

dX109 eXIO"2 fxio3 Ref. T

CK)

AS°t = a + bT + cT!

bX103 cXIO6

Ref. T S°

CK) f e . u . \ Ref. CK) I mole J

2000 53.4 23 [19] 2500 54.6 23 [19]

1800 73.2 23 2000 74.1 2200 75.0 2500 76.0

2000 39.85 23 [18] 2500 43.35 23 [18]

5 ( 0. 0036) 39 10 0.0094 50 0.7002

100 2.836 200 6.378 350 10.599

5 ( 0.0036) 39 10 0. 0094 50 0.6916

100 2.816 200 6.695 350 12.140

1540- 53.68 16 1736

5 0.0055 39 10 0.0149 50 0.6538

100 2.517 200 5.823 350 9.651

5 0.0055 39 10 0.0149 50 0.6456

100 2.494 200 5.984 350 10.833

29

TABLÉ III

E N T H A L P Y INCREMENTS, F R E E E N E R G Y FUNCTIONS AND E N T R O P Y INCREMENTS

Substance T ,

CK)

T ,

CK)

H° - H» T , Tt

( k c a l / m o l e )

Ref. T

CK)

- H j

T (e. u. / m o l e )

Ref. T ,

CK) CK)

S ° - S • T 1 T2

(e. u. / m o l e )

Ref. '

BN (cub ic ) 298. 16 298. 16 0. 000 45 298. 16 298. 16 0. 00 4 5

300 298 0. 006 300 298 0. 02

400 298 0 . 4 8 0 400 298 1. 36

500 298 1 . 1 7 3 500 298 2. 90

600 298 1. 994 600 298 4 . 4 0

100 298 2. 901 700 298 5. 79

800 298 3 . 8 7 7 800 . 298 7. 10

900 298 4. 910 900 298 8. 31

1000 298 5. 994 1000 298 . 9. 45

1100 298 7. 124 1100 298 10. 53

1200 298 8. 297 1200 298 11. 55

C (g raph i te ) 2222 298 9. 745 30

2400 298 10.,980

2600 298 1 2 . 2 3 0

2800 298 1 3 . 5 0 0

(C) + i ( N , ) = ( C N ) 1 3 . 3 6 5 28

1 3 . 3 5 5 28

CrB 298. 16 298. 16 0. 000 4 5 298. 16 298. 16 ,0 . 00 4 5

300 298 0. 016 300 298 0. 05

400 298 0. 963 400 298 2. 77

500 298 2. 028 500 298 5. 14

600 298 3 . 1 7 1 600 298 7. 22

700 298 4 . 3 7 5 700 298 9. 08

800 298 5. 632 800 298 10. 75 .

Substance T i T* H? - H " T l T *

Ref. T G f - H » T

Ref. T l T , S» - S° T , T j

Ref.

CK) CK) (kca l /mo le ) CK) (e. u. / m o l e ) (•K) <"K> (e. u. /mole )

CrB 900 298 6. 936 45 900 298 12. 29

1000 298 8. 285 1000 298 13. 71

1100 298 9. 677. 1100 298 15.04

1200 298 11 .111 1200 298 16. 28

CrBz 298.16 298.16 0 .000 45 298. 16 298. 16 0 45

300 298 0 .024 300 298 0. 08

400 298 1. 360 400 298 3. 92

500 298 2. 804 500 298 7. 13

600 298 4 .354 600 298 9. 96

700 298 6. 012 700 298 12. 51

800 298 7. 778 ,800 298 14. 87

900 298 9. 650 900 298 17. 07

1000 298 11. 630 1000 298 19. 16

1100 298 13 .717 1100 298 21. 14

1200 298 15. 911 1200 298 23. 05

D y i O j 298 10 33. 06 1

10 0 2. 7

E r , 0 , 298 10 33. 81 1

10 0 2. 8

Gd 298 0 2. 17 23 [19] 2000 5 2 . 1 23 [19]

2500 53. 5

GdO 1800 65. 7 23

2000 66. 6

2200 6 7 . 5

2400 68 .4

GdOj 5 (monoclinic) 2000 6 4 . 3 23

2500 70 .8

<M W

G d , 0 , 298 10 28. 33 1 [64]

10 0 7. 8 1

HfBj 298. 16 298. 16 0.000 45 298.16 298.16 0 45

300 298 0.023 300 298. 0. 1

400 298 1. 3820 400 298 4. 5

500 298 3. 6329 500 298 7. 73

600 298 4.6539 600 298 10. 69

•700 298 6. 3534 700 298 13. 30

800 298 i. 1314 800 298 15. 68

900 298 9. 9878 900 298 17. 86

1000 298 11.9250 1000 298 19. 90

1100 298 13. 9384 1100 298 21.82

1200 298 16. 0302 1200 298 23. 64

Ho ¡O, 298 10 32. 38 1 [64]

10 0 5 . 4

La 298 0 1.57 23 [19]

(La) 2000 49. 7 23 [19]

2500 51.2

LaO 1800 65.5 23

2000 66.4

2Î00 67.2

24 00 68. 2

L a , 0 , 298 0 4. 72 23 [18] 2000 59. 6 23 298 5 30. 43 1 [64]

2500 66.3 5 0 0. 002

298 16 30.43 1 [63]

16 0 0. 15

Lu 298 0 1. 52 23 [21]

(Lu) 2000 4 9 . 3 23

2500 50. 6

LuO 1800 64 .1 23

2000 65.0

Substance T I T 2 H° - H » T , T ;

Ref. T Gfr - H» Ref. T , T * S I - S I T , T , Ref.

(*K) C K ) ( k c a l / m o l e ) (•K) T

(e . u. / m o l e ) CK) C K ) (e. u. / m o l e )

LuO 2200 65 .8 23

2400 6 6 . 8

LUjOJ 298 0 ( 4 . 7 ) 23 2000 59. 6 23

2500 6 6 . 3

M O 2 B 298 .16 298.16 0 . 000 45 298. 16 298. 16 0.00 45

300 298 0 . 0 3 5 300 298 0 .12

400 298 1. 992 400 298 5. 55

500 298 3. 823 500 298 9. 78

600 298 5. 735 600 298 13. 27

700 298 7. 661 100 298 1 6 . 2 4

800 298 9. 600 800 298 18. 83

M O B 298. 16 298. 16 0 .000 45 298. 16 298. 16 0. 00 4 5

300 298 0 :017 300 298 0. 06

400 298 1 .009 400 298 2. 90

500 298 2 . 0 6 8 500 298 5. 27

600 298 3. 177 600 298 7 . 2 9

700 298 4. 328 700 298 9. 0 6

800 298 5 .515 800 298 1 0 . 6 4

900 298 6 .738 900 298 12. 08

1000 298 7. 994 1 0 0 0 298 13. 41

1100 298 9. 283 1100 298 14. 64

1200 298 10. 604 1 2 0 0 298 15. 79

MoB2 298. 16 298. 16 0 . 0 . 0 0 45 298. 16 298. 16 0. 0 0 45

3 0 0 298 0.027. 3 0 0 298 0 . 0 9

4 0 0 298 1 .451 4 0 0 298 4. 19

500 298 2. 902 5 0 0 2 9 8 7 . 4 2

600 298 4. 438 6 0 0 298 10. 22

CAO en

MoB¡ 700 298 6 .082 45 700 298 12. 75 45

800 298 7 .846 800 298 15 .11

900 298 9. 737 900 298 17. 33

1000 298 11. 758 1000 298 19 .46

1100 298 13. 913 1100 298 21. 51

1200 298 16. 202 1200 298 23. 50

NbB2 298. 16 298. 16 0. 000 45 298. 16 298. 16 0. 00 45

300 298 0. 022 300 298 0. 07

400 298 1 .303 400 298 3. 75

500 298 2. 737 500 298 6. 94

600 298 4. 294 600 298 9. 78

700 298 5. 962 700 298 12. 35

800 298 7. 734 800 298 14. 71

900 298 9. 607 900 298 16. 92

1000 298 11 .579 1000 298 18. 99

1100 298 13. 648 1100 298 20. 96

1200 298 15. 813 1200 298 22. 85

Nd 298 0 1 .80 23 [19]

(Nd) 2000 51. 0 23 [19]

2500 52 .4 23 [19]

(NdO) 1800 68. 5

2000 69 .4

2222 70. 2

2400 71. 2

NdíOs 298 0 5 .0 23 2000 68 .3 23 298 5 35. 05 1 [64]

2500 75. 5 5 0 2 . 8 1

298 16 33. 61 1 [63]

16 0 3. 31 1

Sm 298 0 1 .81 23 [20]

(Sm) 2000 50. 6 23 [19]

2500 52. 1 23 [19]

co OÍ Substance T i

(•K)

T)

CK)

H° - H» T, T ,

( k c a l / m o l e )

Ref. T

CK) T

(e. u. / m o l e )

Ref. T ,

CK)

T ,

CK)

s ° - s "

T, T,

(e. u. / m o l e )

Ref.

(SmO) 1800 6 9 . 1 23

2000 70. 0

2222 70 .8

2400 71. 8

S m z 0 3 298 0 ( 5 . 0 ) 23 2000 66. 6 23 298 10 33. 22 1 [64]

2500 7 3 . 6 10 0 2. 9 1

( T h ) 2222 298 13. 320 30

2400 298 15. 050

2600 298 16. 750

2800 298 18 .410

ThC, 2222 298 29 .480 30

2400 298 32. 930

2600 298 36 .458

2800 298 40. 065

(ThC 2 ) 2222 298 22 .831 30 2200 75 .36 30

2400 298 25. 370 2300 7 5 . 8 1

2600 298 27. 916 2400 76. 24

2800 298 30 .467 2500 76. 68

2600 77. 04

2700 77 .43

2800 77. 80

298 0 3. 032 1 298 9. 90 1

U ° ! . J 3 < C 0 298 0 3. 002 1 298 9. 66 1

U O j . j r f í ) 298 0 3 .035 1 298 9 .77 1

298 0 3 . 4 0 5 1 298 11 .26 1

298 0 3. 40 1 298 0 22. 5 1

400 0 5. 45 400 0 2 8 . 4

co <1

U0 2 . s 7 500 0 7. 62 1 500 0 33. 2 1

600 0 9 .89 600 0 3 7 . 4

700 0 12. 23 700 0 41. 0

800 0 14. 63 800 0 44. 2

900 0 17.07 900 0 47. 0

1000 0 (19. 55) 1000 0 (49. 7)

1100 0 (22.07) 1100 0 (52. 1)

1200 0 (24. 62) 1200 0 (54. 3)

1300 0 (27.20) 1300 0 (56. 4)

u s 298 0 2. 667 1 [112] 298 0 .03248 1 [112]

US¡ 298 0 3 .701 1 [22] 298 0 .04696 1 [22]

USj 298 0 4. 662 1 [22] 298 0 .05828 1 [22]

W2B 298 298 0. 000 45 298 298 0. 00 45

300 298 0 .028 300 298 0. 09

400 298 1. 663 400 298 4. 79

500 298 3 .417 500 • 298 8. 70

600 298 5. 238 600 298 12. 02

700 298 7 .103 700 298 14. 89

800 298 9 .001 800 298 17 .42

900 298 10. 926 900 298 19. 69

1000 298 12. 875 1000 298 21. 74

1100 298 14 .844 1100 298 23. 62

1200 298 16. 832 1200 298 25. 35

WB 298 298 0 . 000 45 298 ' 298 0. 00 45

300 298 0. 015 300 298 0. 05

400 298 0. 958 400 .298 2. 75

500 298 2 .061 500 298 5. 20

600 298 3. 240 600 298 7. 35

700 298 4 . 4 5 9 700 298 9 .23

800 298 5. 700 800 298 10. 89

Substance T ,

CK)

T 2

CK)

H» - H« T , T ,

(kca l /mole)

Ref. T

CK)

G t - H j T

(e. u. /mole )

Ref. T, CK)

T 2

CK)

s i - s i T, T2

(e. u. /mole )

Ref.

WB 900 298 6 .953 45 900 298 12. 36 45

1000 298 8 .213 1000 298 13. 69

1100 298 9. 475 1100 298 14. 89

1200 298 10.738 1200 298 15. 99

' 298 298 0.000 45 298 298 0. 00 45

300 298 0 .039 300 298 0. 13

400 298 2 .646 400 298 7. 57

500 298 5. 830 500 298 14. 66

600 298 9. 314 600 298 21. 01

700 298 12. 978 700 298 26. 65

800 298 16. 762 800 298 31. 70

900 298 20.634 900 298 36. 26

1000 298 24. 572 1000 298 40 .41

1100 298 28.566 1100 298 44. 32

1200 298 32.606 1200 298 47. 73

Y 298 0 1 .41 23 [21]

(YO) 1800 64. 8 23 •

2000 65. 7-

2222 66. 5

2400 67. 5

. 298 0 3 . 9 9 23 [18] 298 16 23. 58 1 [63]

16 0 0. 11 1

Y H , * 5 0 (0. 009 X 10- ' ) 39 5 (0.0018) 39

10 0 0. 055 X 10"' 10 0. 0039

50 0 0.02604 50 0. 1794

100 0 0.18711 100 0. 965

200 0 0.70791 200 2. 838

* For other temperatures between 5®K and 350'K see Ref. 39.

YH, * 298 0 1. 4027 39 298 4.470 39

350 0 1.8641 350 5. 273

10.0028 ±0. 009

YD, * 5 0 (0. 009 X 10"') 39 5 (0.0018) 39

10 0 0.055 X 10'3 10 0.0039

50 0 0.02571 50 0.1774

100 0 0.18610 100 0. 9556

200 0 0.76327 200 2.879

298 0 1. 6591 298 4. 729

350 0 . . 2.2572 350 5. 691

±0.0033 ±0.010

298 10 29. 01 1

10 0 2. 8

2rBz 298 298 0.000 45 298 298 0. 00 45

300 298 0. 024 300 298 0. 08

400 298 1.459 400 298 4. 19

500 298 3.052 500 298 7. 74

600 298 4.747 , 600 298 10. 83

700 298 6. 517 700 298 13. 56

800 298 8.350 800 298 16. 01

900 298 10.239 900 298 - 18. 23

1000 298 12.180 1000 298 . 20. 27

1100 298 14.169 1100 298 22.17

1200 298 16. 307 1200 298 23. 94

Z l H , * 5 0 O.OlöxlO"5 39 5 0.0026 39

10 0 0. 087 XIO"3 10 0.0062

50 0 0.02333 50 0.1871

100 0 0.16452 100 0. 872

200 0 0.65133 200 2. 566

298 0 1. 2841 298 4.067

350 0 1.6978 350 4.800 /

±0.0020 ±0. 010

* For other temperatures between 5°K and 350*K see Ref. 39.

Substance T, T 2 H° - H ° Ref. T Ref. T, T 2 S° - S ° Ref.

T CK) (°K) (kca l /mo le ) (°K) (e. u. /mole ) CK) CK) (e. u. / m o l e )

Z r D i * 5 0 0. 015X10" 3 39 5 0 .0026 39

10 0 0 .081X10" 3 10 0 .0062

50 0 0 .02303 50 0. 1851

100 0 0. 16316 100 0 .862

200 0 0. 68168 200 2 .576

298 0 1 .4744 298 4 . 2 2 3

350 0 2. 0140 350 5 . 079

10. 003 ±0. 01

* For other temperatures between 5*K and 35CPK see Ref. 39.

TABLE IV

ENTHALPIES AH, F R E E ENERGIES AG AND ENTROPIES AS OF TRANSITION

Substance Transition T AH Ref. CK) (kcal/mole)

Ag s -»g 1134-1219 64.1 30

s -»g 1085-1230 68.45 1.6

Bi s —i g (Bi) 873 45. 4 13

s -ig(Bi2) 873 43. 8 13

Ca s - i g 298 42. 81 i 0. 02 15

298 42. 2 15 [6]

Fe S - > 1

Gd l -»g 76. 9 23 [8]

s -»g 0 84. 1 23

GdC2 S - i g 2150 142. 6 ± 0. 6 30

Hf S - i l 5. 740 13

hep - i bcc

La l -»g 0 100.4 23

S - i g 0 103. 0 23

Lu l -*g 92. 3 23 [8]

s * g 0 94. 7 23

Mg S - » g 298 35. 11 t 0. 09 15

35. 6 15 [6]

34. 9 15

Mo S - » g 2337-2539 167. 9 30

Nd l -»g 70. 2 23 [8]

S - i g 0 76. 6 23

Pu S - i l 0. 5 7 [2]

S - i g 1392-1793 80. 50 èO. 04 24 [41]

Pu02 S - i g ~1800 (131) 24

Sm 1 - i g 48. 7 23 [25]

S - i g 0 50. 0 23

Th s -»g 1757-1956 131. 7 i 2. 8 24 [13]

298 136. 6 24 [13]

42

r CK)

AG (kcal/mole)

Ref. T (°K)

AS (e. u. /mole)

Ref.

2. 04 13 [5]

(2. 3) 13 [5] 2033 (0. 81) 13

1392-1793 22. 94 ± 0. 6 24 [41] 133. 80 -0. 03694 T 25 [21] 2200 37 29 [10]

~1800 (35) 24

1757-1956 27: 4 ± 1. 5 24 [13]

43

Substance Transition T AH Ref. CK) (kc al/mole)

Th s - g 298 136. 6 ± 0. 5 30 [18] 2500 126. 0 ± 4 34

ThO s ^ g Th02 s ->g 2200-3000 158. 7 i 2. 5 24 [3]

U 1405 106. 7 4

s (a) ->s(ß) 935 0. 674 33 [27, 28]

s(ß)-»s( r) 1045 1. 085 33 [27,28]

s(y)-»l 1405 3. 200 33 [27, 28]

s -*1 2. 500 13 [8]

2.600 ±0.07 4 [1] s ->g 298 115. 2 ± 3 4

298 126. 0 i 8 4 [8]

34 [4] 298 114. 3 ± 8 4

298 122. 0 ± 8 4

298 117. 7 ± 8 4

1630-1970 106. 76 ± 0. 01 24 [28]

0 116. 6 ± 0. 1 34 [4]

(125) 34 [3]

2000-2900 105 34

UO (in solid solution) S ->g 141 27

uo2 s -»g 1600-2400 137. 1 ± 1. 7 24 [24, 29]

1923-2223 143 43

X

U jO, (ot) X 30. 5 0. 0025 1

U3Og(a) X 25. 3 0. 012 1

U03 s -»g 1230-1700 92. 0 ± 2. 0 24 [22, 25]

(hypothetical process)

44

T AG Ref. T AS Ref. . CK) (kcal/mole) CK) (e. u. /mole)

1883 -41. 5 25

144. 50-0. 0330 T 25 [24] 2200-3000 35. 3 ± 1. 0 24 [3]

1405 26. 6 4

21. 8 ± 2.1 34

1. 78 13 [8]

298 36. 1 ± 3. 5 4

»

1630-1970 26. 09 t 0. 07 24 [28]

137. 00-0. 036 T 25 [14] 1600-2400 36. 4 ± 0. 9 24 [24,29]

28. 7 0. 87 1 30. 5 0. 09 1 25. 3 0. 56 1

1230-1700 41. 0 ± 2. 0 24 [22, 25]

45

Substance Transition T (°K)

AH (kcal/mole)

Ref.

UOS (in solid solution) 80. 0 i 1. 3 27 US s ^ g 2300 150. 3 i 3. 1 27

X US2 paramagn. -diamagn. UC S -ig 1948-2133 224. 8 43 uc2 s -»g 2300 138 31

2300 133 31 2300 158 31 2300 130 31

U6Fe s -» l UFe2 s ->1

USn3 s ->g 1298-1568 78. 8 43 W03 s -»g Xe 1 -»g Y S -il 91. 3 23 [24]

S ^ g 0 99. 0 23 Zr s -> 1

s -»g 1540-1736 58. 66 16 hep —>bcc

Zr in Zr-Sn-mixture 1. 5% Sn(weight) s ->g 1503-1673 62. 2 16 6% Sn (weight) S -ig 1503-1673 63. 2 16

' 10% Sn (weight) s ->g 1549-1716 71. 3 16

46

T AG Ref. T AS Ref. CK) (kcal/mole) (°K) (e. u. /mole)

1800-2800 -7. 65271 X 103 - 27 2300 38. 36 ± 0. 6 27 -1. 2210 T +

+0. 13212 X 10~3T2 + 1800-2800 1218. 01-0. 264238T 27 +2. 90655 X 103 log T+ -1. 26225 XlO6 T1

+6. 8635 XlO-3 Tlog T -6. 8635 log T

180 1. 17 1 [112] 298 3.42 1 [22]

2300 26. 3 31

2300 22. 2 31

2300 32. 0 31 2300 19. 5 31

19. 845-0. 01841 T 13

14. 175-0. 00963 T 13

124. 90-0. 06906 T 25 [11]

18. 3 13 [14]

i.

(2. 3) 13 [5]

1135 0. 81 13

47

TABLE V

H E A T S A H x , F R E E E N E R G I E S A G x , A N D E N T R O P I E S A S x O F . R E A C T I O N

React ion T

CK)

A H x (kcal)

Ref. T

CK)

AG x (kcal)

Ref. T

CK)

d a s t

( e . u . ) Ref.

i ( (B¡0 3 ) ) t i (H ,O) = (HBO,) 4 1 . 3

4 2 . 3 ± 2

28

28 [6]

BeO = (Be) + ( 0 ) 2 8 1 . 3 - 0 . 0 7 1 1 T 25 [23]

(C) + i (N , ) = (CN) 0

0

0

- 5 8 . 2

- 6 0 . 6

- 6 0 . 0

28

28

28

2340

2312

2312

-26 . 97

- 2 9 . 7 3

- 2 9 . 1 1 to

to 10

CO 00 OO

(CN) = (C) + (N) 173 i 3. 5

192 .5

166.0 i 4 . 6

164.4 - 183 .5

28

28

28 [13]

28 [16]

(C ,N , ) = 2(CN) 0 158 .6 è 4 . 6

109 .3

28

28 [13]

(Ca) + i ( 0 , ) = CaO - 1 9 3 . 4 6 + 0 .0508 T 44

CdCOs = CdO + (CO, ) 646 2 3 . 2 3 42 [20]

(Ce) + (LaO) = (CeO) + (La) 1870 1 . 0 5 1 0 . 2 23 1870 0 . 33 ± 1 23

(CeO) = (Ce) + (0 ) 0 190 .2 23

C11SO4 • 5 H , 0 = C11SÓ4 • H , 0 + 4 ( H 2 0 ) 385 53 .78 42 [18]

CuSO, • H , 0 = CuSO, + ( H , 0 ) 551 17 .42 42 [18]

(Eu) + (LaO) = (EuO) + (La) 5 8 . 0 ± 4 23

(GdO) = (Gd) + (O) 0 161 .8 ± 4 . 9

1 9 0 . 4 i 4 . 6

23

23

Gd, 0 3 = 2(GdO) + ( 0 ) 0 4 5 3 . 3 23

GdC, = (Gd) + 2C 2150 100 .7 ± 0 . 3 30

(Gd) + 2C = (GdC,) 2150 37. 9 i 0. 5 30

(LaO) = (La) + (0 ) 0 190 .5 23

L a , 0 3 = 2(LaO) + (0 ) 0 4 3 0 . 2 23

(Lu) + ( U O ) = (LuO) + (La) 2200 26 . 1 ± 1. 5 23 2200 0 . 1 è 0 . 7 23

(LUO) = (Lu) + (0 ) 0 1 5 9 . 1 i 6. 9

165 .3 23

Lu,03 = 2(LuO) + (0) 0 4 9 5 . 7 23

c n O

React ion T

CK)

A H J

(kcal) Ref.

T

CK)

a A G J

(kcal) Ref.

T

CK)

0 A S T

(e . u . ) Ref.

(Mg) + i ( 0 2 ) = MgO - 1 7 6 . 6 0 + 0 . 0 5 0 5 T 44

MgSO ä - 1 H j 0 = M g S 0 4 - H j O + e t H j O ) 386 1 9 . 4 1 42 [18]

M g S 0 4 * H p = M g S 0 4 + ( H 2 0 ) 590 15 .62 42 [18]

M g N i ; = (Mg) + 2Ni 298

298

4 9 . 0 1 ± 0 . 0 9

4 6 . 5

15

15

(Nd) + (LaO) = (NdO) + (La) 1900 22. 7 1 0 . 1 23 1900 2 . 1 1 0 . 4 2 3

(Nd) + (PrO) = (NdO) + (Pr) 1910 6. 9 i 0. 6 23 1910 - 1 . 5 1 0 , 3 23

(NdO) = (Nd) + ( 0 ) 0 1 6 6 . 9 1 6 . 9

1 6 8 . 7

2 3

23

Nd2 O3 = 2 (NdO) + ( 0 ) 0 4 2 8 . 0 1 23

l(Ch) = (0) 61 .000 - 0 . 0 1 6 1 T 25

PaC2 d i l . solut. in ThC2=(Pa) + 2C + ThC2 2300 - 2900 1 7 9 . 2 1 8 . 7 34 2300 - 2900 32. Ol 3.4 + 4. 5761ogXpa 34

PbCOa = PbO + (CO2 ) 593 2 0 . 2 3 42 [19]

(Pi) + (LaO) = (PrO) + (La) 1913 1 5 . 8 1 0 . 4 23 1913 3. 6 i 0 . 2 23

(Pi) + (TbO) = (PiO) + (Tb) 2000 - 4 . 1 1 1. 0 23 2000 3. 8 1 0 . 5 23

((Pu)) + 2 C- PuC, 298

2200

- 6 . 9 7 8

- 5 . 7 8 4

29

29

' (PuO) = (Pu) + ( 0 ) 0 1 6 8 . 3 24 3 7 ]

Pu0 2 = (PuO) + ( 0 ) 1100 - 2000 (146) „¿[29 ,35 , 2 4 37]

1700 - 2000 (37) 24 [29, 35, 37]

(Pu0 2 ) = (Pu) + 2 (0 ) 0 (323) 24

PuC«.77 + 1. T7(0 2 ) = PuOz + 0. n (C0 2 ) 3 2 8 . 9 1 3 . 1 33

P u 2 C j + 5 ( 0 2 ) = 2 P u 0 2 + 3 (C0 2 ) 793 33

PuC2 = (Pu) + 2 C 298

2200

9 5 . 1

8 1 . 9 8 4

29

29

(Sm) + (EuO) = (SmO) + (Eu) 2300 9 . 0 i 3 23 2300 (0) 23

(Sm) + (LaO) = (SmO) + (La) 2240 4 8 . 8 1 2 . 0 23 2240 2 . 9 1 1 . 0 23

(Sm) + (YO) = (SmO) + (Y) 2430 23. 5 1 1. 6 23 - 0 . 6 1 0. 6 23 •

(SmO) = (Sm) + ( 0 ) 0 133. 0 i 6. 9

1 4 2 . 5

23

23

S m 2 0 , = 2(SmO) + (0) 0 4 4 3 . 2 23

Ta + i ( 0 , ) = ( T a 0 )

(Tb) + (LaO) = (TbO) + (La)

(TbO) = (Tb) + (0 )

(Th) + 2C = ( T h C , )

Th + ThOj= 2(ThO)

(ThO) = (Th) + ( 0 )

( T h O , ) = (Th) + 2 ( 0 )

T h O , + 4C = T h C , + 2 ( C 0 )

T h e j = (Th) + 2C

T h O , = (ThO) + (O)

ThC + 2 ( 0 , ) = T h O , + ( C O , )

U + ( 0 , ) = U O ,

((U)) + ) - U O ,

298 298

21.0 ± 1.0 1 7 0 . 4

31. 8 ± 1 . 3 27. 6 ± 0.5

2 3

2 3

30 30

298 298

298

2300 - 2900

1 9 1 . 3

3 7 5 . 7

194 .8 195. 55 ± 2

1 6 0 . 3 ± 3 . 2 184. 7 i 1 . 5 1 7 2 . 0 ± 4 . 6

173, 5 ± 2 . 2

379 ± 5. 6

24 [3]

2 4 [3]

33 [21] 30

30 30

34

24 [3]

3 3

(U) + ( O , ) = (UO, )

U + C = UC .

((U)) + C = UC

((U)) + 2C = U C ,

((U)) + 2B = UB,

((U)) + 4B = UB4

((U)) + 12B = UB,,

U ( a ) + 3 [ H a q ] = [U 3a

+q)+ | ( H , ) *

* in 0. 5 N H C l O j

2 3 . 0 0 - 0 . 0 2 0 0 T

500 600 700

1600 1700 1800 1900 2000

2000 2200

- 2 3 8 . 2 / m o l e O , - 2 3 4 . 2 / m o l e O , - 2 3 0 . 1 / m o l e O ,

- 1 9 3 . 3 / m o l e O , - 1 8 9 . 4 / m o l e O , - 1 8 4 . 3 / m o l e O , - 1 8 1 . 1 / m o l e O , - 1 7 6 . 8 / m o l e O ,

- 1 8 6 . 5 / m o l e O, - 1 7 6 . 4 / m o l e O ,

- 2 2 . 1 + 0 . 0 0 1 5 T

- 2 4 . 4 + 0 . 0 0 3 1 T - 2 5 . 2 + 0 . 0 0 3 6 T

- 3 2 . 6 + 0 . 0 0 3 6 T

- 3 9 . 3 + 0 . 0 0 3 0 T

- 6 0 . 4 + 0 . 0 0 4 4 T

- 1 0 6 . 0 + 0 . 0 1 0 5 T

35 35 35

35 35 35 35 35

35 35

14 [8 ]

14 [8]

3 3 . 8 ± 1 . 8

3 8 . 4 ± 1 . 0

34

2 4 [3 ]

Reaction T

(•K)

AHÍ-(kcal)

Ref. T

CK)

A G x (kcal)

Ref. T

("K)

. AS?-

( e . u . ) Ref.

ü ( a ) + 4 [ H +a q ] = [Uaq] + 2 ( H 2 ) * 298 - 1 4 6 . 3 4

298 - 1 5 1 . 3 ± 3 . 0 4 12]

U(a ) + (0 , ) + 2 [ H j q ] = [UOj + (H2 ) 298 -250. 0 ± 2 . 0 4

i n 0 . 5 N H C 1 0 , 298 - 2 5 0 . 6 4

298 -249. 7 4

in very di lute HCl 298 -246. 8 4

in very.dilute HBr 298 - 2 5 2 . 1 4

((U)) + 2((Fe)) = ((UFej)) - 1 0 . 2 13

6((U))+((Fe)) = ((U sFe)) - 8 . 2 13

UC1, + (O,) = UOjCl, + (Cl2) 298 -49 1 298 - 6 . 8 6 1

(UO) = (U) + (O) 0 (175,2) ¿ 4 23]

0 172. 9 27

(UC^ ) = (U) + 2(0) 0 343 .5 24

0 343 .5 27

U0 2 = (UO) + (O) (33.4) 24

UO^fi 0*)^! 0 . 503 - 1 3 . 5 ± 1 . 8 42

503 - 1 2 . 7 t 0 . 8 42

U 0 2 + 0 . 3 3 3 ( 0 ! ) = u 0 j , t s l 1373 - 2 4 . 9 5 40 1373 - 1 1 . 1 9 40

1473 - 2 4 . 5 40 1473 - 1 0 . 7 6 40

1473 - 2 3 . 6 40 1473 - 1 0 . 2 40

UOi + 0 . 1 2 5 ( 0 2 ) = j U J O , 298 - 1 0 . 5 ± 0 . 5 40 298 - 4 . 6 40 823 - 1 0 . 0 4 40 823 - 3 . 6 6 40 973 -10 .03" 40 973 - 3 . 6 2 40

1123 - 9 ; 78 40 1123 - 3 . 4 3 40 1273 - 9 , 8 9 40 1273 - 3 . 5 0 40 1373 - 9 . 4 3 40 1373 - 3 . 1 7 40

U 0 2 + Ó.125 (0 2 ) = U0 2 . 2 5 1300 - 8 . 4 5 1 [27] 1300 - 5 . 50 1 [27] 1300 - 2 . 3 0 1 [27] 1300 - 8 . 6 6 1 1300 - 5 . 2 0 1 1300 - 2 . 7 7 1

- 8 . 7 0 1 [46] - 4 . 9 3 1 [46] - 2 . 9 0 1 [46] - 9 . 3 1 [47] -S . 5 1 [47] - 2 . 9 1 [47]

U02 + 0 .333 (0 2 ) = U 0 2 „ -25 .34 ± 0 . 0 3 1 [36] U02 + 0 .333 (0 2 ) = U 0 2 „ -25. 7 1 [38] - 2 7 . 5 1 [39] - 2 6 . 1 1 [40]

* in 0. 5 N HC104

u o , + 4 ( 0 , ) = <uo,) 54.193 + 0.00639 T

- 0. 00773 TlogT 25

U 0 ! t x + n ( 0 ¡ ) = U , 0 , . 2 1396 - 1723 - 8 1 . 0 / m o l e 0 , 40 s - 4 0 . 2 / m o l e O, 40

U 0 , . „ + 0 . 2 1 ( 0 , ) = UO, . 6 , 298

873 - 1396

( - 1 7 . 1 ) - 1 4 . 9 -15. 52

1 1 [39]

40

298 ( -14 .3 ) 1 298

873 - 1396 873 - 1393

( 9 .2)

- 8 . 0 2 - 7 . 8 0

1

40 40

U4 O, + 0. 72 (Oj) = 4U0Í.JI 873 - 1393 - 7 8 . 6 / m o l e O , 40 - 3 9 . 2 / m o l e O, 40

U 0 2 . „ = U 0 , . , 5 + 0 . 0 0 5 ( 0 , ) (0.4) 1 ( 0 . 3 ) 1 ( 0 . 2 ) 1

• UOl . l ! + | ( 0 , ) = UO,.s , 653' -10.8 i 1.3 42

6 . 2 5 UO,.¡s = 6 .25 U O , , „ + (O, ) 298 82.98 1 298 69.32 1 298 45. 93 1

U 0 , . t , = UO, ,B + 0.045 (O, ) ( 3 . 4 ) 1 ( 2 . 9 ) 1 1.6 1

U 0 , . „ + | ( 0 , ) = U 0 , ( a ) - 9 . 2 - 5 . 4 - 7 . 6

1 [43] 1 [38] 1 [39]

u 0 2 . 87 + (amorphous) ( - 5 . 8 ) 1 [33]

f U , 0 , + 1 ( 0 , ) = (UO,) 80 .90 - 0 .0299 T 25 [16]

(UO, ) = (U) + 3(0) 0 493 .3 24 [22,25]

6 U Q , ( y ) = 2 U , 0 , + ( 0 , ) 1000

1025

s 3 . 2

s 6 . 9 4

4

298 4 2 . 4 4

3 U0,C1, + ( 0 , ) = U , 0 , + 3(C1,) 298 4 5 1 298 69 1

(UOS) = (U) + (O) + (S) (300) 27

(US) = (U) + (S) 2300

119.9

121

27

27

(US, ) = (U) + 2(S) (230) 27

US = (U) + (S) . 2300 271.2 i 4 . 0 27 2300

2300

120.6

-7.53833X103- 1.2232T

+0.132119xl0- s T*

+2.90655xl0 3 log T

+0.29650x10- 3 T log T

27

27

2300 . 1 8 0 0 - 2 8 0 0

6 5 . 4 9 ± 1 .6

1223.06-0 .264238 T

-1 .26225 x i o ' T"1-

-0 .29650 log T

27

27

U, Na = i (N, ) + 2 UN 298 - 2 9 . 1 5 i 0 . 5 37 1223

298

- 3 3 . 5 8 è 0 . 1 6

- 3 9 . 2 3

37

37

UC, ,8 + 2 .86 ( 0 , ) = UO, + 1 . 8 (CO,) 441 i 4 33

UC, =(U) + 2C 142. 6 - 0 .03117 T 32

2 UC, = U , C , + C 1770 0 33

Reaction T

ck) A H X

(kcal) Ref.

T CK)

A G T (kcal)

Ref. T CK)

A S t

(e. u. ) Ref.

UC + Ç = UC, 1400 - 2 1 . 5 14 [6] 2200 - 2 2 . 0 14 [6]

-8 .800+0 .0008 T 14 M

U , C j = " U C + UC, 2050 0 33

U , C j + 17 (0 , ) = 2 U j O , + 9 (C0 , ) 8 0 1 . 3 i 3 . 7 33

| t í B 4 = Í U B „ +<U) 147. 6 - 0 . 02892 T 32

j U B u = | u B , + (B) 143 .430-0 .03488T 32

(Y) + (LaO) = (YO) + (La) 2040 25. 3 ± 0. 5 23 2040 3. 5 ± 0. 7 23

(YO) = (Y) + (0) 163. 7 ± 4 . 6 23 166 .0 23

Y , O j = 2(Y0) + (O) 0 502 .6 ' 23

Z r + ( 0 , ) = (ZtO,) - 9 4 . 0 0 + 0 . 0 0 5 1 T 25 [26]

TABLE VI

H E A T CAPACITIES C p

A. SUBSTANCES Cp = a + bT + cT2 +dT"2 cal degree"1 mole"1

Substance T (•K)

a' bx 103 cXIO5 dX10"5 Ref.

Al 4.94 2.96 36 [2]

BN (cubic) 298.16 2.95 45

300 3.04

400 6.07

500 7.66

600 8.69

700 9.44

800 10.06

900 10.59

1000 11.07

1100 11.52

1200 11.94

C(graphite) 298-2300 4.10 1.02 -2.1 33

CrB 298.16 8.57 45

300 8.61

400 10.16

' 500 11.08 600 11.76

'700 12.32 800 12.81 900 13.27

1.000 13.71

1100 14,13 1200 14. 54

CrB2 298.16 12.80 45 300 12.83

400 13.90 500 14.97

600 16.04

700 17.12

55

Substance T CK) a bxio3 ÇX105 dxio"5 Ref.

CrB2 (cont'd) 800 18.19

900 19.26 1000 20.33 1100 21.40

1200 22.48

HfBz 298.16 14.23 45 300 14.25

400 15.03

500 15.82

600 16.60

700 17.39

800 18-17

900 18.96

1000 19.74

1100 20.53

1200 ; 21.31

MOjB 298.16 18.79 45 300 18.81

400 18.94

500 19.07

.600 19.19 700 19.32

800 19.45

MoB 298.16 9.42 45 300 9.44 400 10.30 500 10.86 600 11.31

700 11.69

800 12.05 900 12.40

1000 12.73

1100 13.05

1200 13.37

56

Substance T CK)

a bXlOS CXIO5 dX10-5 Ref.

MoBj 298.16 14.45 45

300 14.47

400 14.24

500 14.88

600 15.87

700 . - 17.02

800 18.26

900 19.56

1000 20.88

1100 22.22

11200 23.58

NbB2 298.16 11.81 45

300 11.85

400 13.65

500 14. 99

600 16.14

700 17.21

800 18.23

900 19.23

1000 20.21

1100 21.17

1200 22.14

Si02 (a) 298-848 11.22 8.20 -2.70 36 [2]'

TaB 298.16 11.30 45

300 11.31

400 10.79

500 10.92 600 11.30

700 11.80

800 12.36

900 12.96 1000 13.58

1100 14.22

1200 14.87

57

Substance T ('K) a bx 10s cXIO5 dXlo"5 Ref.

TaBj 298.16 13.98 45

300 14.01

400 • 14.88

500 15.76

600 16.64

700 17.51

800 18.39

900 19.27

1000 20.14

1100 21.02

1200 21.89

ThS 298 16.80 1 [114]

ThC 2 12. 60 i 1.16 2.00i 0.18 -2.62 ± 0.20 30 [22]

TiBj 298.16 13.02 45

300 13.05

400 13.76

500 14.47

600 15.18

700 15.89

800 16.60

900 17.30

1000 18.01

• 1100 18.72

1200 19.43

U(<x) 298-935 3.3 8.2 0.7 33

U (Ö) 935-1045 10.2 33

' V (y ) : 1045-1405 ; 9.2 33

((U)) 1405-3000 9.2 33

UO2 ; 433-1462 19.20 1.62 -3.957 1 [5] 36 [3]

298 15.33 1 [1] 28.7 ! 9 1

58

Substance T C K) a bXIO3 - cXIO5 dXKT* Ref.

U02.2S 298 17.53 1 [1]

U02.33 373-673 1.78 0.1453 • -0.89 ' 42

298 17.03 1 [1]

B - u o w 298 17.17 1 [1]

uo2.67 20.67 4.83 -3.08 1 298 18.96

21.7 2.5 -3.63 42

a-UOs 298 20.16 1 U]

US 0-250 4.4 8.8XT 1 [112] 298 12.08 1 [112]

US2 ! 298 17.84 1 [22]

us3 298 22.85 1 [22]

uc 298 12. 00 ±0. 75 33 [26] 523 13.2510. 75 33 [26]

8.0 10 33 373-673 5.01 26.3 -1.92 36

uc2 373-673 2.93 , 43.3 -3.17 36

W2B 298.16 15.36 45 300 15.41 400 17.08 500 17.93 600 18.45 700 18.83 i 800 19.12 900 19.37

1000 19.59 1100 19.79 1200 19.98

WB 298.16 8.01 45 300 8.08 400 10.44" - -*

59

Substance T c k )

a bX 10s c x i o 5 d x 1 0 " 5 Ref.

WB (cont'd) 500 11.49

600 12.03

700 12.32

' 800 12.49

900 12.57

1000 12.61

1100 12.63

1200 12.62

w2 b 5

298.16 21.09 4 5

300 21.32

400 29.65

500 33.62

600 35.87

700 37.31

800 38.32 .,'

900 39.08

1000 39.68

1100 40.18

1200 40.61

y h 2 * 5 (0.0043) 39 10 0.0154

50 1.830 100 4.242

200 6.039

298 8.243 350 9.554 ±0.016

y d 2 * 5 (0.0043) 3 9

10 0.0154

50 1.810 100 4 . 2 6 7

200 7.400 298 1 0 . 7 7 3

350 12.247

±0.022

* Values for other temperatures are given in the text.

60

Substance T

( •K) a bXIO3 CX105 dXlO"5 Ref.

YH2 . YD2 < 11 Ö ^ X I O ^ T 39

+ 0 .903X10 _ 4 T 3

ZrB2 2 9 8 . 1 6 1 3 . 1 2 45

300 1 3 . 1 6

400 1 5 . 2 9

500 1 6 . 5 0

600 1 7 . 3 5

700 1 8 . 0 3

800 1 8 . 6 2

900 1 9 . 1 5

1000 1 9 . 6 6

1100 2 0 . 1 4

1200 2 0 . 6 0

ZrH2* 5 0 . 0 0 6 8 39

10 0 . 0 2 5 2

50 1 .540

100 3 . 8 4 8

200 5 . 6 3 0

298 7 . 3 9 6

350 8 . 5 7 9

È 0 . 0 1 5

ZrD2* 5 0 . 0 0 6 8 39

10 0 . 0 2 5 2

50 1 . 5 2 0

100 3 . 8 3 8

200 6 .537

298 9 . 6 3 1

350 11 .144

±0.019

ZrH2, ZrD2 < 11 9.8x10"4 T 39

+Q.1538X10"4 T 3

* Values for other temperatures are given in the text.

6 1

B. REACTIONS • . ACP a + bT + dT"2 cal degree"1 mole"1

Reaction T CK) a . b XlO3 dX10"5 Ref.

U(a) +C->UC 298-935 0. 5 1 1.4 33

U(0) + C-»UC 935-1045 -6. 3 9 2.1 33

«U)),(y)+C-UC > 1045 -5. 3 9 2.1 33

UC14 + (02) -»U02C12 + (Cl2) 298 -2 29 1

6.25 U02 jj 6.25 U02 .26 + (02) 1. 80 -8.71 -3.07 1

3 U0zCl2 + (02) -U 30 8 + 3(C12) 298 -0. 35 1

62

TABLE VII

VAPOUR P R E SSURES

log10P= a + bT"1

Substance T P P (atm) (mm Hg) Ref (°K) (atm) (mm Hg) (atm) (mm Hg) (°K) (atm) (mm Hg) a b a b

Ag 1073-1233 ' 8. 8860 -14 030 43

1085-1229 9. 646 -14 960 16

B( in graphite crucible) 2000 2. 66x 10"8 7.745 -30120 32

2015 3. 63x 10"8

2030 4. 60xlO"8

2043 5. 65 x10~8

2055 6. 70x 10*8

2071 8. 28 x 10"8

2080 1. 02X10"7

2100 1.35X10"7

B over UB4-UB l2 2000 9.42x10"® 32

2015 1. 18x 10"8 - -

2027 1. 59x 10"8

2041 1. 81x 10"8

2054 2. 32X10"8

2064 3. 05*10-*

2080 3. 81 x 10"8

log I0P=a + bT"1

T P P Ref. Substance CK) (atm) (mm Hg) (atm) (mm Hg) Ref. CK) (mm Hg)

a b a b

2100 5. OOxlO"8

2127 7. 76xl0"8

B: 1/8 UB1Z 7. 625 -31340 32 1/8 UB4+(B)

B-dissociation pressure 2010 3. 16X10-8 32 over UB12-B-mixture 2022 3. 69X10-8

( 96%B) 2022 3. 69X10-8

2051 6. T4X10"8

2073 9.14X10"8

2091 1.13x 10"'

2115 1. 86x10"'

Ca 844 -2.472 15

872 -2. 113

873 -2.113

889 -1.938

918 -1.598

928 -1.498

942 -1.356

963 -1.141

965 -1.151 •

Ca + Mg2Ca 655-718 5. 93 ±0.46 -8480 ± 320 15

Cr 1473-1623 10 890 -20 830 43

CsF i - 5 5 Tm 508 6 [12]

CsCl 1. 55 T m 242 6 [12]

CsBr 1.55 Tffl 210 6 [12]

Csl 1. 55 T m 203 6 [12]

Cu + MgCu2 751-1037 5. 02 à 0.20 -8540 i 130 15

KF 1. 55 T m 650 6 [12] KCl 1. 55 Tm 467 6 [12] KBr 1. 55 Tm 397 6 [12]

KI 1.55 Tm 300 6 [12] LiF 1. 55 T m 143 6 [12] LiCl 1. 55 Tm 72 6 [12] LiBr 1.55 Tm 44 6 [12]

LU 1. 55 Tm 10 6 [12]

M g 626 -3.486 15 658 -2. 641 669 -2. 617 694 -2. 072 718 -1. 925 741 -1. 531 757 -1.304 797 -0. 871 818 -0.558

Substance T CK)

P (atm)

P (mm Hg) (atm)

l o g i o p = a + bT"1

(mm Hg) Ref. P (mm Hg)

a b a b

626-818 5. 81 ±0.19 -7550 ±130 15 MgNi2+MgjNi 676-870 6. 54 ± 0.11 -8840 ±90 15 M g s V M g . 7 Y 3 688-837 5. 86 ±0.12 -7780 ±90 15

Mg Y + MgjYz 718-913 6. 03 ±0. 18 -8290 ± 140 15 MgCu2 + Mg2Cu 675-1075 5.12 ± 0. 20 -7830 ±110 15

N2 dissociation of U2N3 33. 58/R - - 54 600 R 37

NaF 1. 55 Tra 908 6 [12] NaCl 1.55 T m 430 6 [12]

NaBr 1.55 Tm 387 6 [12]

Nal 1. 55 Tm 257 6 [12]

Ni + MgNi2 857-1075 6. 24 ± 0. 20 -10700 ±200 15

Pa (over PaC2 in dilute solution in ThC2)

6. 99 ± 0. 74 + log xpa

-39200± 1900 34

Pu 5. 014 ± 0. 047 -17 587 ±73 24 [43]

Pu (over PuC2 and graphite)

Pu02

RbF

2000-2400

2000-2400

1. 55 T m 512

2. 779 ±0.11

8.072

-17 920 ±250

-29240

29

24 [41] 25 [21] 6 [12]

RbCl 1. 55 Tm 308 6 [12]

RbBr 1. 55 T m 239 6 [12] Rbl 1. 55 Tm 193 6 [12] Th 1757-1956 5. 991 i 0. 333. -28 780 ±620 24 [13] Th (over ThC2 and 7. 39 ± 0. 39 -37 600 ±1000 34

graphite)

ThO ( over Th and ThOp 1883 5. 5XlO"5 25

ThOz 1883 2.1X 10~7 25

((U)) 5. 701 ±0.011 -23 330 ±21 24 [28]

U ( over UC2 and 2001 1. 74xlO"9 32 graphite) 2034 3. 09XlO"9

2071 5. 75x10"' 2060-2460 7. 01 -34568 31 2540-2820 7. 00 -33593 31

4.- 76'±0.47 -28 400 ±1100 34

6. 81 -31170 32

uo2 25. 686-4. 026 log T -33 115 25 [14]

1750 5.1 x IO-7 25

2000 6. 9xl0"5;

2250 3. 0 x 10"s

2500 1.4xl0-2

1923-2223 12. 098 -32150 43

UO3 [according 1750 1. 60 X10"3 25 U02+1/2(0S) = (U03): 2000 1. 39xl0"2 at p = 10"6 atm] 2000

log,„P= a + bT"1

Substance T CK)

P (atm)

P (mm Hg) (atm) (mm Hg) Ref. T

CK) P

(atm) P

(mm Hg) a b a b

2250 7. 70XlO"2

2500 0. 309

at Pr, = 10"8 atm u2 1750

2000

2250

2500

1. 60 X10"4

1. 39X10"3

7. 70X10"3

3. 09X10-2

25

US -1; 7382 -1. 3181x10» T"2

+9. 3776 X 1010 T" 3

3.127 27

U2NJ (see N2 dissociation pressure)

-

UC 1948-2133 21. 306 -49 200 43

UC2 2300

2300

2300

2300

-7. 391

-7. 824

-8. 019

-8.485

31 [10]

31 [8]

31 [10]

31

USn3 1298-1568 9. 067 -17 223 43

U ( over UB4-UB12) 2000

2015

2027

2041

1. 5X10"10

1. 8xlO"10

2.3X10"10

3. 6 x 10"10

32

u [3/2UB, = IUB[2+(U)]

Y Y + MgY Zr

Zr (over Zr-Sn mixtures)

1. 5% Sn (weight "Jo)

6% Sn (weight %)

10% Sn (weight %)

4. 2x10-10

5. 6XL0_I»

5. 9X10-1»

9 .1X 10~9

1 . 4 X 1 0 - 9

. 32

5. 76 ± 0. 27

- 3 2 260

- 8 7 6 0 ±220

7. 8130 -15803

1. 58

0 . 7 7

10. 2159

-12 800

- 1 3 000

- 3 1 0 6 6

1 . 6 0 5

1.60 2.68

- 1 3 600

- 1 3 800

- 1 5 600

TABLE VIII

THERMODYNAMIC P R O P E R T I E S OF MIXTURES

System Ref.

Am - HCl Heat of solution of Am in 1.5 M HCl = 162 ± 3 kcal/mole 3 [4,5]

B - U see U

Ba - Bi AHm = 160 kcal (xBa = 0.6) 20 [25]

AG „„„ = -63 kcal/mole (c = a few ppm) Ba,773 v Ba " ' 20

BaCl2 - Bi f BaCl 2= ( 0 - 2 1 ) ; X = 0 ' 5 - 20

Bi - Ba see Ba

Bi - BaCl2 see BaCl2

Bi - Ce see Ce ^

Bi - Cs see Cs /

Bi - CsCl see CsCl

Bi - La see La

Bi - MeClj Me = rare earth metal : f , = (0. 01); x = 0.5 MeCl3 v 20

Bi - Nd see Nd

Bi - Sm see Sm

Bi - Th see Th

Bi - U see U

System Ref.

Bi - Zr see Zr

C - U see U

Ce - Bi -E AG„ __„ = -50 kcal/mole (c-, s a few ppm) Ce, 773 20

Results of Ce-Bi cell measurements EMF values and derived quantities at 427°C 20

x_ Ce E (V)

AG Ce (kcal)

AG* Ce (kcal)

i Ce

0. 0277 0. 772 -53.4 -48. 5 7. 7 X 10"16

0. 047 0. 767 -53. 0 -48. 9 5. 9 X 10"16

Cs - Bi '—E AG = -27 kcal/mole (c = a few ppm) Cs, 773 Cs

20

CsCl - Bi fC s C 1 = ( l ) ; x = o.5 20

Cm - HCl Heat of solution in 1 M HCl = -138 ± 7 kcal/mole 3 [15]

Ga - U see U r H - U see U

H - Zr see Zr

Hf - O

In - U

La - Bi

Mg - Bi

MgCl2-Bi

Nd - Bi

Ni NiO AG(02) =

O - Hf see Hf

O - T i see Ti

O - U see U

O - Zr see Zr

Pb U see U

Sm - Bi

Sm - U

Sm - Zr

O (%)

-AHQ (fecal) -AS0 (e. u. )

5 129. 6 12 10 127.2 13 15 123. 6 12 20 122. 3 13

see U

AGe = -52 kcal/mole (c = a few ppm) La,773 La fMg = 1 5 x 10"3 ( 5 0 < f c- d'1"» Bi~ solution)

f . . _ . =(0.21); x = 0.5 MgCl2

A5Nd 773 = _ 4 4 k c a l / m o l e ( cN d = a few ppm)

AG E

•Sm, 773

see U

see Zr

-63 kcal/mole (c = a few ppm) Sm r r

44

20

20 [21]

20 [22]

20

40

20

System Ref.

Th - Bi Results of Th- Bi cell measurements, EMF values and derived quantities, at 800°C 20

Th - Zr

Ti - O

Th

0. 00135

0. 00165

0. 0022

0. 0031

0. 0046

0. 0080

see Zr

E (V)

0 . 4 5 8

0. 452

0 . 4 4 7

0 . 4 4 1

0 . 4 2 8

0. 417

—M Th

(kcal)

- 4 2 . 2

- 4 1 . 7

- 4 1 . 2

- 4 0 . 7

- 3 9 . 5

- 3 8 . 5

< < Th

(kcal)

-28. 2

-28. 0

-28. 2

-28.4

-28. 0

-28. 2

Th

1. 9 X 10~S

2. 0 X 10" 6

1. 8 X 10" 6

1. 7 X 10" 6

2. 0 X 10" 6

1. ¿ X 1 0 " 6

0 -AHq (kcal) -AS0 (e. u. ) 1100-1300°K

0. 5 134. 6 11.9

1. 0 134. 0 13.0

2. 0 134.1 14.5

5. 0 133.4 16.0

10. 0 130. 8 17.0

15. 0 128. 7 17.0

Ti - O (cont'd)

O -AH0(kcal) -AS0(e. u. ) 1100-1300°K .(%) -AH0(kcal) -AS0(e. u. ) 1100-1300°K

20. 0 128.1 18. 0

25. 0 127. 6 19. 0

30. 0 126.4 19.1

33.3 125. 8 19. 3

4 4

Ti - U

For AGQ at various temperatures and compositions see Ref. [44]

see U

U - B

U - ((Bi))

T (°C) U-activity at 70- 75% B U-activity at 20-40% B

1450 1 .11 ± 0. 05 X 10"2 0. 72

1500 1 .24 ± 0. 05 X 10'2 0.70

.1550 1. 37 ± 0. 05 X 10~2 0. 67

Bismuth activities in U - Bi alloys at 1015°K

Region Bi-activity Region Ref. [6] Ref. [12]

U + Bi 8. 8 x 10"s 5. 0 X 10"4

UBi +UsBi4 3.1 X 10"2 0.14 U3Bi4 + U3Bi5'l 0.17 U3Bis + UBi2 J 0.42 0. 24 UBi2 + ((Bi)) 0. 83 (0.83)

32

4 [6,12]

System - Ref. Region Bi-activity

U - UBi 4. 2 x 10"*

5 X 10'4

19

19 [6] UBi - U3 B 4 2.4 x 10-2

0.14 19

19 [6] U3Bi4 - U3Bi5 0.17 19 [6] U3Bi4-UBi2 0.418 19 U3Bi5 - UBi2 0.24 19 [6]

Thermodynamic activity of Bi in U - Bi system 1018 - 1115°K, saturation limit UBi2 - liquid and estimated errors at 1064°K 19

Activity of bismuth (Ref. to pure, liquid Bi) Temp. CK) U - UBi

(XlO4) UBi - U3Bi4

(XlO2) U3Bi4-.- UBi2 UBi2-liquid Sat. limit*

(mole fract. )

1115 12. 6 4. 90 0. 538 0. 865 0. 067 1089 9. 55 4. 10 0. 506 0. 858 0.058 1064 7. 24 3.46 0.473 0. 849 0. 051 1041 5. 67 2. 93 0.444 0. 837 0. 045 1018 4. 20 2.46 0. 418 0. 829 0. 039 1064 est. error ±36% ±50% ±5% ±5% ±10% (±2 o)

* From Ref.[8]log1Qxu = 1.215 2690 TfK)

*

Thermodynamic activity in the system U - Bi 20

Bismuth activity Uranium activity

Composition Range

GROSS 20 [11] (742°C)

COSGAREA 20 [12] /(745°C)

GROSS 20 [11] (742'C)

COSGAREA 20 [12] (745°C)

Ref. 20 (700°C)

U - UBi 7 . 6 X 1 0 " 4 8. 8 X 10'3 1 1

UBi - U3BÍ4 0. 104 0. 0306 7 . 3 X 1 , 0 " 3 0. 287

U 3 B Í 4 - U3BÍ5 0.25 0. 418 2. 3 X IO-3 8 . 7 X 1 0 " 3

U3Bi5 - UBi 0. 54 6. 3 X 10"4

UBi2 - liquid 0 . 8 3 0. 83 2. 6 X 10"4 2 . 2 X 1 0 " 3

X D = 0 . 0 5 0. 89 6. 0 X lO"5

0. 01 0. 984 1 . 0 X 1 0 - 5 6 X 1 0 " 6

Thermodynamic activity of U in U - Bi system 1018- 111S°K and estimated errors at 1064°K 19

Temp. Activity of uranium (Ref. to pure y-uranium)

CK) U - UBi UBi - U3BÍ4 (X 102)

U3 BÍ4 - UBi 2 (X 10")

UBi 2-liquid (X 1 0 " )

aU Í (X 1 0 3 )

1115 1. 00 2. 55 10. 3 6. 31 -2. 56 2. 76

1089 1. 00 2 . 3 3 8.32 4. 73 -2. 60 2. 51

1064 1. 00 2. 14 6.31 3. 06 -2. 68 2. 07

System Ref.

(cont'd) Temp. • CK)

Activity of uranium (Ref. to pure y-uranium) -

Temp. • CK) U - UBi UBi - U3BÍ4

(X 102) U3BÍ4 - UBi2

(X 104) UBi2 - liquid

(X 104) a u Í

(X 103)

1041 1.00 1. 69 4. 82 2. 29 -2. 77 1. 69

1018 0. 98 1. 67 3. 85 1. 50 -2. 82 1. 51

1064

est. error - - ±68% ±40% ±41% ±60%

(±2 o) „

lQg,o fu ; 2

Results of U

.670 - Ü f É T(°K)

- Bi cell measurements, EMF values and derived quantities, at 700°C -

19

20

xu E (V)

—M A C u (kcal)

< (kcal)

fu

0. 0004 0.443 -30. 5 -15.3 3. 6 x 10"4

0. 0005 0.397 -27. 5 -12. 5 1. 6 x 10'3

0. 0006 0.434 -30. 0 -15.7 3. 0 X IO"4

0. 0036 0. 370 -25. 6 -14. 7 4. 9 X 10"4

0. 0068 0. 354 -24. 5 -14.8 4. 6 X 10"4

0. 0093 0.345 -23. 9 -14. 8 4. 7 X IO"4

u - c

y - «cd))

U - ((Ga))

U - H

T(°C) U-activity at 6 4 - 5 3 at. fo C U-activity at 2 5 - 4 0 at. % C (UC - UC2 ) (UC - U2C)

1 4 5 0 ( 3 . 4 ± 0 . 3 X 1 0 " 2 ) 0 . 9 4

1 5 0 0 ( 3 . 9 ± 0 . 3 X 1 0 " 2 ) 0 . 9 1

1 5 5 0 ( 4 . 4 ± 0 . 3 X 1 0 " 2 ) 0 . 8 8

—E = -2. 2 kcal/mole; ASy = -12. 0 e. u. /mole (450°C)

—E AG = 6. 5 kcal/mole — E — E

Ly = -28. 6 kcal/mole; AS = -13. 5 e. u. /mole; AG^ = -18. 8 kcal/mole (450°C)

Thermodynamic values pertaining to ß - hydride phase of U - H system

XH A H M AS XH (kcal/g atom) (e. u. /g atom)

0. 738 -6. 707 -9. 75 0. 740 • -6.989 -10.07

0. 742 -7.232 -10.35 0. 744 -7. 333 -10.59 0. 746 -7. 565 -10.75 0. 748 -7. 726 -10. 96 0. 750 -7. 862 -11.14

32

18

18

8

System Ref.

C o e f f i c i e n t s for in tegra l r e l a t i v e f r e e - e n e r g y equa t ion

A G M = go + g i X H + g 2 x ^ ( c a l / m o l e )

450°C 500°C 550°C 600°C 650°C

go 1457. 78491 802. 51334 542. 57554 433. 85042 432. 62857

gl -3895 . 694 - 2 1 4 8 . 4 9 6 -1454 . 788 -1-166. 238 -1166 . 788

gz 2603 1439. 3 977. 5 787. 0 790. 9

U - ((In))

U- O

_ - E - E

L^ = -2 . 8 k c a l / m o l e ; AS^ = 4. 9 e. u. / m o l e ; A G ^ = 0. 8 k c a l / m o l e (450°C)

T h e r m o d y n a m i c quant i t ies (per m o l e of 0 2 ) for the 2 - p h a s e region U 4 0 9 _ y - U 0 2 + x

18

40

T ( ° C ) - A G (kca l ) - A S ( e . u. ) - A H ( k c a l )

550 5 5 . 3 3 7 . 4 8 6 . 1

700 49. 5 43. 7 92. 0

850 42. 7 45. 3 9 3 . 4

950 3 8 . 0 53. 3 103. 2

1050 31. 5 72 126. 5

1100 2 7 . 4 103 169

Part ial m o l a l quant i t ies for the U 4 0 9 - r eg ion (1040°C)

Composi t ion - A G o ( 1 0 0 0 ° C ) - A H 0 " A S 0 O / U (kca l ) ( k c a l ) - (e. u. )

2. 239 33. 15 96. 2 49. 5

2. 245 30. 85 89. 8 46. 2

2. 247 29. 55 85. 3 43. 7

U 3 0 8 . z - region:

A G ( q , ) = - 4 8 2 0 0 + 21. 07 T + 325 Ax T ± 1590 ( ca l )

Ax = increase of oxygen concent ra t ion per U - a t o m beyond the composi t ion UO2.60 £ £

Ly = 2 .6 k c a l / m o l e ; AS = -0 . .6 e. u. / m o l e ; A G y = 3 .0 k c a l / m o l e (450'C)

— —E —E L^ = -13 . 8 k c a l / m o l e ; A S y = - 0 . 7 e . u. / m o l e ; A G y = 1 3 . 4 kca l /mo ' l e (450°C)

Ly = -14 . 1 k c a l / m o l e ; A S ^ = - 0 . 4 e. u. / m o l e ; A G ^ = 14. 3 k c a l / m o l e (450°C)

Ly = -23 . 4 k c a l / m o l e ; A S ^ = - 1 8 . 1 e. u. / m o l e ; A G ^ = -10 . 3 k c a l / m o l e (450"C)

E

AG = 1. 020 k c a l / g - a t o m (max) a t x = 0 . 4 7

(Xe) = ((Xe)) j y j , AH = 106. 650 k c a l / g - a t o m see U

CO lo System Ref.

Results of Zr - Bi ce l l measurements, EMF values and derived quant i t ies , at 700°C 20

XZr E

(V)

_M AG

Zr (lical)

Zr (kcal)

f Z r

0. 0015 0. 226 -20. 8 -8. 3 1. 4 X 10~2

0. 0040 0. 213 -19. 6 -9. 0 1. 0 X 10"Z

0. 0064 0. 200 -18. 4 -8. 7 1. 1 X 10-2

0.0194 0. 180 -lb. 6 -9. 0 1. 0 X 10~z

0. 0220 0.169 -15. 6 -8. 2 1. 4 X 10"2

Zr - H M E

Coeff ic ients for AH and AS

AH h 0 i b ,xH + h2x^ (cal/mole); ASE s„ < s ,xH + (c. u. /mole)

Couff. Phase

N « B 6

I'D 0 - 547. 3 - 29 573. 0

h. -14 600 - 2 244. 4 - 1 1 1 532. 5

h 2 24 000 -28 304 - 70 471. 1

S 0 0 0. 936 11 .416

s t - 1 5 . 3 2 0. 68 -51 . 930

s 2 29 -28 . 0 26. 76

CO 00

ASj of saturated a -phase : ~ - 5 e. u. / g - a t o m

a - p h a s e : f „ = 0. 25 - 0. 36", f , = 1 -0 . 98, at 600°C H Zr

0 -phase : f = 7. 2 X 10"2 - 6. 4 X 10" 2 ; f = 1 . 2 3 - 1 . 3 0 H Zi

Zr - 0 Relative part ial molar enthalpy and entropy of oxygen in Zr - O alloys 44

Composit ion -AH 0 - A S 0

(at.<7oO) (kcal ) ( e . u . )

1 . 0 147. 3 1 1 / 5

2. 0 145. 0 12. 3

5. 0 _138. 8. 14. 0

10. 0 135. 5 16. 0

15 .0 136. 7 20. 0

20. 0 134. 8 20. 0

25. 0 135. 2 21. 8

30. 0 134. 4 23. 0

Zr - Sn 1. 5 wt. °!o Sn: log a = 0. 425 - 0. 08 x 104 T " 1 , (T°K)

AG = 1. 945 T - 0. 366 x 104 c a l / m o l e Zr

16

AS = - 1 . 9 4 5 e. u. / m o l e ; AH = - 3 . 660 k c a l / m o l e Zr Zr

6 vyt. % Sn. log a = 0. 42 - 0 . 1 x 104 T ' 1 16

System Ref.

A G Z r = X ' 9 2 2 T " 4 5 8 * 1 0 4 c a l / m o l e

AS_ = - 1 . 922 e. u. / m o l e ; Ä B = -4 . 580 k c a l / m o l e Zr Zr

10 wt. <Jf> Sn: log a = 1. 50 - 0. 28 X 10 4 T " 1 16

AG = 6. 864 T - 1. 281 x 10 4 c a l / m o l e Zr

AS - - 6 . 864 e. u. / m o l e ; AH = - 1 2 . 810 k c a l / m o l e Zr Zr

Zr - U see U

CO

TABLE III

M E L T I N G P O I N T S

Substance T ' m CK)

Ref. Substance T

m CK)

Ref.

BaO 2198 6 [11] MgO 3073 6 [11]

Bi 544 20 NaF 1265 6 [11]

CaO 2873 6 [11] NaCl 1074 6 [11]

CsF 955 6 [11] NaBr 1023 6 [11]

CsCl 918 6 [11] NaJ 933 6 [11]

CsBr 909 6 [11] Pu 912, 7 7

CsJ 894 6 [11] RbF 1048 6 [11]

Hf 2495 13 RbCl 988 6 [11]

KF 1129 6 [11] RbBr 953 6 [11]

KCl 1045 6 [11] RbJ 913 6 [11]

KBr 1013 6 [11] SrO 2733 6 [11]

KJ 958 6 [11] T h 0 2 3493 +50 24 [4]

LiF 1121 6 [11] UC ~2623 35

LiCl 887 6 [ i l ] UC 2 ~ 2 7 2 3 35

LiBr 823 •6 [11] US + 30

2735 - 5

27

Li J 718 6 [11] Zr 2133 13

M g C l 2 - N a C l -50 : 30 :

KCl 20

669 20 [15]

8 5

TABLE III

D E N S I T I E S

Substance T

(°C) P T g / c m 3 Ref.*

Am 1 1 . 7 ± 0 . 3 3 [4]

~ 2 5 11. 87 ± 0. 05 3 [6]

13. 7 3 [7]

BaCl2 1000 2. 982 6 [3] e

BiCl3 271 3. 554 6 [3] b

BiBrs 281 4. 099 6 [3] b

CdCl2 600 3. 366 6 [3]f

CsF 826 3 . 4 5 6 6 [3]

CsCl 830 2. 592 6 [3]

CsBr 808 2 . 9 1 5 6 [3]

Csl 821 2. 953 6 [3]

HgCl2 293 4. 670 6 [3] g

HgBr¡ 241 5 . 1 1 3 6 [3] h

KCl 900 1 . 4 5 2 6[3]

KBr 800 2 . 0 7 3 6 [3]

KI 800 2. 334 6 [3]

NaCl 1000 1 . 4 4 8 6 [3]

NaBr 900 2. 217 6 [3]

Nal 700 2 . 7 0 4 6 [3]

RbCl - 828 2 . 0 2 4 6 [3]

RbBr 831 2. 542 6 [3]

Rbl 772 2 . 7 1 9 6 [3]

U 3 0 7 11 .17 1

i 0.02 )

* In this co lumn Reference 6 [3] followed by a le t ter refers to the footnotes t o T a b l e III

on p. 104 of Thermodynamics of Nuclear Mater ia ls , IAEA, Vienna (1962).

8 7

TABLE III

S U R F A C E TENSIONS

T(°K) a observed a ca lcu la ted

Ref. * Substance T(°K) (dyn /cm) (dyn /cm)

Ref. *

((BaClj )) 1273 157 152 6 [3] j

((BiClj)) 544 66 52 6 [ 3 ] b

((BlBr3)) 554 64 47 6 [ 3 ] b

((CdCl2)) 873 83 79 6 [31 k

((CsF)) 955, Tm 107 6 [10] 1099 96 85 6 [3] b

((CsCl)) 918, Tm 90 6[10] 1103 78 79 6 [ 3 ] b

((CsBr)) 909, Tm 85 6[10] 1081 72 76 6 [3] b

« C s J » 894, T m 75 6 [10] 1094 63 70 6 [ 3 ] b

((HgBr2)) 514 65 37 6 [3]1

((HgClz)) 566 56 36 6 [3]1

«KF)) 1129, Tm 142 6 [10]

((KCl)) 1045, T m 99 6[11] 1173 90 96 6 [3 ]d

((KBr)). 1013, T m 89 6[11] 1073 85 87 6 [3 ]d

((KJ)) 958, Tm 79 6[11] 1073 69 76 6 [3] d

((LiF)) 1121, T m 251 6 [10]

((LiCl)) 887, T m 138 6 [10]

((NaF)) 1265, T m 202 6[10]

((NaCl)) 1074, T m 116 6 [11] 1273 98 111 6 [3 ]d

((NaBr)) 1023, T m 99 6[11] 1173 91 95 6 [ 3 ] d

((Naj)) 933, T m 88 6 [11] 973 84 85 6 [3 ]d

((RbF)) 1048, T m 131 6[10]

((RbCl)) 988, T m 99 6 [10] 1101 89 81 6 [ 3 ] b

(CRbBr)) 953, Tm 91 6[10] 1104 81 83 6 [ 3 ] b

((RbJ)) 913, Tm 83 6 [10] 1045 72 72 6 [ 3 ] b

* In this column Refetence 6 [3] followed by a le t ter refers to the footnotes to Tab le III on p. 104 of Thermodynamics of Nuclear Materials , IAEA, Vienna (1962).

8 9

TABLE XII

L A T T I C E P A R A M E T E R S

Substance Phase Lat t ice parameters Reference

Am Double-hexagonal close packed a = 3. 642 ± 0 . 0 0 5 Â 3 [6]

phase ( P 6 3 / m m c ) c = l l . 76 + 0 . 0 1 Â

» a = 3 . 4 7 4 ± 0 . 0 0 5 Â 3 [7]

c = 11 .25 A

Face centred cubic a = 4 . 8 9 5 ± 0 . 0 0 5 Á 3 [7]

C m Hexagonal a = 3 . 4 9 7 ± 0 .002 Ä 3 [14]

c = 11. 333 ± 0 .005 Á

Pu0 2 a = 5. 3952 ± 0. 0001 Ä 33

uo2 a = b = c = 5 .46852Ä (26 .5°C) 1 [28]

U40s Cubic a = 21 . 7 Â (true unit ce l l ) 40 [16]

U307 ' Tetragonal a = 5 .447 Ä; c = 5 . 4 0 0 Ä ; c / a = 0 . 9 9 1 1 [18]

a a = 5 .467 Â ; c / a = 0. 986 (20°C) 1

Face centred U-subcell a = 5 .472 A ; c = 5 .397 Äi c / a = 0 .9863 1

Face centred U-subcel l a = 5. 363Â ; c = 5 . 5 3 1 Â ; c / a = 1 .031 1 [ 9 ]

0 c / a = 1 .031, U 0 2 3 4 - U 0 2 . 4 3 1

c / a = 1 .016, U 0 2 3 0 - U 0 2 33 1

3 a = 5. 38 Ä ; c / a = 1 .031 40 [28]

Substance Phase Lat t ice pa ramete r s Reference

On oxydat ion of U 0 2 powder to UO2.33 at :

150°C c / a = 1 . 0 1 - 1 . 0 1 9 1 [14]

200°C c / a = 1 . 0 1 6 - 1 . 0 3 2

250 - 2 8 0 ° C c / a = 1 . 0 2 9 - 1 . 0 3 2

(Unit c e l l vo lume remains constant)

460 - 520°C c / a = 1 .010 1 [21]

UOS Tetragonal (PbClF-type) a = 3 . 4 8 3 Á: c = 6 . 6 9 7 Â 27

US Cubic (NaCl- type) a = 5 . 4 9 0 3 + 0 .0002 A 27

U 2 S 3 Orthorhombic a = 1 0 . 4 1 A; b = 10. 65 A 27

c = 3 . 8 9 A

u 3 s 5 Orthorhombic a = 7 . 4 2 k; b = 8 . 0 8 A 27

c = 11 .72 Â

u s 2 Tetragonal (high t e m p . ) a = 10 .27 A ; c = 6 . 3 1 Â 27

Orthorhombic a = 4 . 1 3 Â; b = 7 . 12Â

.— Q AO %

27

Hexagonal (low t e m p . )

C — 0 . 4 Ö / 1

a = 7 . 2 5 2 A: c = 4 . 0 6 7 Â 27

us . Monoclinic a = 5 . 4 0 Â; b = 3 . 9 0 Â 27

c = 1 8 . 2 6 A; ß =80°30 '

UC Cubic (NaCl- type) a = 4 . 9 5 5 A 36

UC 2 Tetragonal a = 3 . 5 1 5 Â ; c / a = 1 . 7 0 4 36

R E F E R E N C E S (The fo l lowing i s copied f r o m the Contents of T h e r m o d y n a m i c s of N u c l e a r Mater ia l s , IAEA, Vienna 1962. The papers have been numbered to c o r r e s -pond to those given in the Reference columns of the Tables of this Supplement. A paper number fol lowed by a number in square brackets ( i . e . 1 [9], 23 [ 22]) indicates a r e f e r e n c e c i ted by the author in h is paper. )

Paper No.

1. Chemica l thermodynamics of the actinide e l ement c h a l c o g e n i d e s 3 E.F. Westrum, Jr. and F. Grfinvold (United States of America)

2. T h e r m o d y n a m i c p r o p e r t i e s of compounds of act in ide e l e m e n t s . . 39 R.J. Ackermann and R.J. Thorn (United States of America)

3. T h e r m o d y n a m i c s of the act inide s 61 B.B. Cunningham (United States of America)

4 . S o m e i n c o n s i s t e n c i e s in the t h e r m o d y n a m i c data for uranium compounds 71 M. H. Rand (United Kingdom)

5. N o n - e q u i l i b r i u m t h e r m o d y n a m i c s 85 I. Prigogine and R. Balescu (Belgium)

6. The s ta t i s t i ca l t h e r m o d y n a m i c s of fused s a l t s 93 H. Reiss (United States of America)

7. S t a t i s t i c o - t h e r m o d y n a m i c a l study of the equi l ibr ium between hydrogen g a s and plutonium dihydride phase I l l S. Takeuchi and K. Susuki (Japan)

8. Ca lcu la t ions of in tegra l and part ial t h e r m o d y n a m i c funct ions for s o l i d s f r o m d i s s o c i a t i o n - p r e s s u r e data 131 A. W. Searcy and D. J. Meschi (United States of America)

9. Modern t h e r m o c h e m i c a l methods for de termin ing heats of f ormat ion 145 H. Skinner (United Kingdom)

10. The appl icat ion of oxygen and f l u o r i n e - b o m b c a l o r i m e t r y to n u c l e a r m a t e r i a l s 155 H.M. Feder, D.R. Fredrickson, E. Greenberg, W.N.Hubbard, R.L. Nuttall, E. Rudzitis, J.L. Settle and S. S. Wise (United States of America)

11. The standard m o l a r f r e e e n e r g y of f o r m a t i o n of s o m e c h l o r i d e s of Mg, Ce , U and Th by s o l i d - s t a t e EMF techniques 163 J. J. Egan, W. McCoy and J. Bräcker (United States of America)

12. E x p e r i m e n t a l equation of s tate data for uran ium and i t s in terpretat ion in the c r i t i c a l reg ion 173 I.C. Skidmore and E. Morris (United Kingdom)

13. F r e e - e n e r g y and phase d i a g r a m s 219 O. Kubaschewski (United Kingdom)

14. T h e r m o d y n a m i c s of high mel t ing uranium and thor ium compounds 243 E. Rudy (Austria)

i 93

15. De terminat ion of thermodynamic funct ions for the format ion of binary i n t e r m e t a l l i c p h a s e s f r o m v a p o u r - p r e s s u r e m e a s u r e m e n t s 271 J.F. Smith (United States of America)

16. Термодинамические свойства циркония и е г о сплавов с оловом 285 Г.Б. Федоров и Е.А. Смирнов (СССР)

17. Теплоты образования интерметаллических соединений плутония с алюминием и железом и урана с железом 309 В. В. Ахачинский, Л.М. Копытин, М.И. Иванов и H.С. Подольская (СССР)

18. T h e r m o d y n a m i c s of the binary s y s t e m s of uranium with Zn, Cd, Ga, In, Tl , Sn and P b 319 I. Johnson and H.M. Feder (United States of America)

19. T h e r m o d y n a m i c s of the uran ium-b i smuth s y s t e m . 331 P.A. Rice, R.E. Balzhiser and D. V. Ragone (United States of Am erica)

20. T h e r m o d y n a m i c s of so lut ions of ac t in ides and f i s s i o n products in b i smuth 345 R.H. Wiswall, Jr. and J.J. Egan (United States of America)

21. The e m b r i t t l e m e n t of niobium in hydrogen contaminated NaK . . 365 A. Thorley and С. Ту zack (United Kingdom)

22. Vapor izat ion p r o c e s s e s of r e f r a c t o r y subs tances 401 P. W. Gilles (United States of America)

23. T h e r m o d y n a m i c s of the earth ox ides at e l evated t e m p e r a t u r e s ; d i s s o c i a t i o n e n e r g i e s of the g a s e o u s monox ides 417 D. White, P.M. Walsh, L.L. Ames and H.W. Goldstein (United States of America)

24. Vapor izat ion p r o p e r t i e s of thorium, uranium and plutonium m e t a l s and ox ides 445 R.J. Ackermann and R. J. Thorn (United States of America )

25. Vo la t i l e ox ides of s o m e important m a t e r i a l s used in nuc lear technology 465 E.H.R. Cordfunke (Netherlands)

26. T h e r m o d y n a m i c study of the thorium phosphides with a m a s s s p e c t r o m e t e r . 447 K.A. Gingerich and J. Efimenko (United States of America)

27. Vapor iza t ion and thermodynamic p r o p e r t i e s of uranium sulphide and oxysulphide 487 E.D. Cater, E.G. Rauh and R.J. Thorn (United States of America)

28. The r e a c t i o n of graphité with nitrogen at e l evated t e m p e r a t u r e s 505 J. Berkowitz (United States of America)

29. The vo lat i l i ty of plutonium carbide 517 R.N.R. Mulford, J.O. Ford and J. G. Hoffman (United States of America)

30. Vapor iza t ion of gadol inium and thor ium d i c a r b i d e s 529 D.D. Jackson, G.W. Barton Jr., O.J. Krikorian and R.S. Newbury (United States of America)

94

31. Vapor izat ion s tud ies of the uranium dicarbide phase 549 H. Eick, E.G. Rauh and R.J. Thorn (United States of America)

32. A study of uranium b o r i d e s and c a r b i d e s by m e a n s of the Knudsen e f fus ion technique 563 C. Alcock and P. Grieveson (United Kingdom)

33. The t h e r m o d y n a m i c p r o p e r t i e s of the act in ide c a r b i d e s including new m e a s u r e m e n t s of the hea t s of f ormat ion of s o m e thor ium, uranium and plutonium c a r b i d e s 581 E.J. Huber, Jr. andC.E. Holley, Jr.(United States of America)

34. Vapor izat ion of the c a r b i d e s of uranium, thor ium and proctac t in ium 601 H.K. Lonsdale and J. N. Graves (United States of America)

35. Vapor izat ion d'uranium et de c a r b u r e s d'uranium 625 W.J. Deiss, H. MichaudandC. Antelme (France)

36. The m e a s u r e m e n t of the s p e c i f i c heat of uranium c a r b i d e s above room t e m p e r a t u r e 645 Y. Mukaibo, K. Naito, K. Sato and T. Uchijima (Japan)

37. Heat s of f ormat ion of uranium s i l i c i d e s and n i t r i d e s 653 P. Gross, C. Hayman and Mrs. H. Clayton (United Kingdom)

38. Давление пара металлического иттрия .' 667 A.H. Несмеянов, Ю.А. Приселков и В.В. Карелин (СССР)

39. T h e r m o d y n a m i c p r o p e r t i e s of ZrH2, ZrD^, YU2 and YD2 675 H. E. Flotow and D. W. Osborne (United States of America)

40. T h e r m o d y n a m i c data for the uranium o x i d e s between UO2 and U 3 0 8 693 T.L. Markin, L.E.J. Roberts and A . Walter (United Kingdom)

41. Equi l ibr ium m e a s u r e m e n t s and interpretat ion of non-s t o i c h i o m e t r y in иОг + х 713 E. Aukrust, T. F friand and K. Hagemark (Norway)

42. The heat of format ion of U 3 0 7 723 T. Mukaibo, K. Naito, K. Sato and T. Uchi.iima (Japan)

43. Определение упругостей паров ураносодержащих соединений 735

B.Е. Иванов, A.A. Круглых, B.C. Павлов, Г.П. Ковтун и В.М. Амоненко (СССР)

44. T h e r m o d y n a m i c p r o p e r t i e s of z i r c o n i u m - o x y g e n , t i t an ium-oxygen and h a f n i u m - o x y g e n a l l o y s 749 K.L. Komarek and M. Silver (United States of America)

45. H i g h - t e m p e r a t u r e heat contents of s o m e r e f r a c t o r y b o r i d e s 775 R.Mezaki, E.W. Tilleux, D.W. Barnes and J. L. Margrave (United States of America)

46. Определение скорости испарения окислов металлов на образцах, нагреваемых электрическим током 789 Н.М. Воронов, A.C. Данилин и И. Т. Ковалев (СССР)

95

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INTERNATIONAL ATOMIC ENERGY AGENCY VIENNA, 1964

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