RECENT TRENDS IN

HIGH PRESSURE RESEARCH

Proceedings of the

XIII AIRAPT International Conference on

High Pressure Science and Technology

7-11 October 1991

Edited by

Anil K. Singh

OXFORD & IBH PUBLISHING CO. PVT. LTD.

New Delhi Bombay Calcutta

CONTENTS

Preface: A.K. Singh V

ELECTRONIC PROPERTIES

Pressure-induced Effects and Phase Transitions in Semiconductors

(Bridgman Medal Lecture) 3

S. Minomura

Pressure Effeot on Electronic Band Structures in

(AIAs)m (GaAs)m Superlattices 13

S. Minomura, S. Hitomi and K. Takarabe

Pressure Effect on Deep Donor States in Si-Doped AlxGa,.xAs 16

S. Minomura, H. Ashizawa and K. Takarabe

Semiconductor Quantum Wells and Heterostructures under High Pressure* 19

H.R. Chandrasekhar and M. Chandrasekhar

High Pressure Studies of Semiconductor Optoelectronic Devices

and Low Dimensional Structures* 25

K. Poguntke, D.J. Dunstan andA.R. Adams

Pressure-tuned Resonance Raman Scattering in Ga^l^As/Ga^AlyAsMultiple Quantum-Well Structures* 31

A. Jayaraman

Phase Transitions in AlAs/GaAs Superlattices 38

U.D. Venkateswaran, L.J. Cui, B.A. Weinstein andF.A. Chambers

Steady-State and Time-Resolved Optical Investigations of

Semiconductors under Pressure* 41

K. Reimann, M. Holtz, K. Syassen, J. Nunnenkamp, J. Kuhl,

R. Notzel, A.J. Shields and K. Ploog

Characterization of Bulk EL-2 Trap in GaAs under Pressure 47

A.K. Saxena and R.P. Benyon

'Invited lectures

VII

Excrtonic Insulator Phase in TmSe044 Teow 50

B. Bucher, P. SteinerandP. Wachter

Effect of Pressure on the Magnetic Transitions in Cr0WRh00, 53

T.G. Ramesh and V. Shubha

Electronic Properties of Some PdTM Alloys (TM-Transition Metal)under the High Hydrogen Pressure 56

A.W. Szafranski, SM Filipek and I. Kownacka

Non-linear Optical Measurements of Electronic Structures of Alkali

Halides, Aromatic Hydrocarbons and Xenon at High Pressures* 59

W.B. Daniels, Zu-he Yu, J. Blechschmidt, M. Lipp, D. Strachan,

D. Winters, C. Yoo and H.M. Zhang

Resonant Raman Scattering and Photoluminescence Studies

in Semiconducting Nanocrystal Composites and

Colloids at High Pressures 65

John Schroeder, Markus R. Silvestri, Xue-Shu Zhao,Peter D. Persans and Lih-Wen Hwang

Lanthanides and Actinides under Pressure—Related But Not Identical* 68

U. Benedict

Behaviour of Uranium under Pressure—Recent Results* 74

P. Ch. Sahu, Mohammad YousufandK. Qovinda Rajan

Theoretical High Pressure Studies In LaS 80

S. Sankarallngam, S. Mathi Jaya, R. Jagadish and R. Asokamani

Ground State Properties and Pressure Studies of

Antiferromagnetic MnRh 83

R. Jagadish, S. Mathi Jaya and R. Asokamani

Effect of Pressure on the Fermi Surface of Metals* 86

R. Ahuja, A.K. Solanki, T. Nautiyal and S. Auluck

Fermi Surface of Copper under Strain 91

R. Ahuja, A.K. Solanki, and S. Auluck

The Fermi Surface of VB Transition Metals: Under Hydrostatic Pressure 94

A.K. Solanki, R. Ahuja and S. Auluck

Effect of Pressure on The Electron Energy Levels of Aluminium

Cluster Using MSX-Alpha Method 97

K. lyakutti and M. Thiagarajan

High Pressure Properties of SrGe03 from Band Structure Calculations 100

S. Mathi Jaya, P. Ravindran and R. Asokamani

VIII

First Principles Study of the Electronic Structure of Tin

at Different Pressures 103

H.G. Salunke, G.P. DasandN.E. Christensen

MOLECULAR VIBRATIONS

Vibrational Spectroscopy of High Pressure Phase Transitions* 109

W.F. Sherman

Optical Properties of Ammonium Nitrate Salt Solutions Studied

by Raman Scattering 115

John Schroeder, Ying—Te Lee and Chung—Sun Choi

Raman Scattering Study of Molecular Motion of Iodine

Precursory to Its Dissociation at 21 GPa 119

Y. Hayashi, Y. Fujii, H. Fujihisa, K. Aoki, H. Yamawaki,O. Shimomura and K. Takemura

High-Pressure Raman and Brillouin Studies of

Hydrogen Sulfide up to 23 GPa 122

Hiroyasu Shimizu and Shigeo Sasaki

High Pressure IR Study of Solid CM 125

H. Yamawaki, K. Aoki, Y. Kakudate, M. Yoshida, S. Usuba,H. Yokoi, S. Fujiwara, Y. Bae, R. Malhotra and D. Lorents

PHASE TRANSITIONS AND EQUATIONS OF STATE

High-Pressure X-Ray Diffraction Study on Electronic

S-D Transition in Zirconium 131

Yuichi Akahama, Mototada Kobayashi and Haruki Kawamura

Equation of State and Phase Transformations Study of Nd at

Ultra-high Pressures* 134

J. Akella, G.S. Smith, J.Z. Hu andS. Weir

Neutron Diffraction Studies of Me-H Systems at Pressures up to

7.5 GPa* 139

S.P. Besedln, V.P. Glazkov, I.N. Goncharenko, A.V. Irodova

and V.A. Somenkov

Electron Density Distribution in Solid Iodine Refined byMaximum Entropy Method 145

H. Fujihisa, Y. Fujii, M. Sakata, M. Takata, Y. Kubota, K. Takemura

and O. Shimomura

A Neutron Diffraction Study of The High Pressure Phases of

Cyclohexane-D12 148

N.B. Wilding, P.D. Hatton and G.S. Pawley

IX

Investigations of Some Structural Phase Transitions at High Pressures

(Thesis Lecture) 151

Hema Sankaran

Pressure-induced Phase Transformation of Quasicrystals 156

V. Akahama, Y. Mori, M. Kobayashi, H. Kawamura,

K. Kimura and S. Takeuchi

High Pressure X-Ray Diffraction Studies on Amorphous Selenium 159

Mohammad Yousuf, P.Ch. Sahu, N.V. Chandra Shekar,

M. Mahendran and K. Govinda Rajan

Pressure and Temperature Dependence of the Lattice

Parameters of TiD, M 162

Syed B. Qadri, E.F. Skelton, M. Nagumo, A.W. Webb,

F.E. Lynch and R.W. Marmaro

Pressure Induced Crystalline Transformations of Diluted

Magnetic Semiconductors* 165

S.B. Qadri, E.F. Skelton and A.W. Webb

Pressure Induced Transformations in CdTe096Se004 169

SyedB. Qadri, E.F. Skelton, A.W. Webb, E.R. Carpenter Jr.

and Jim Kennedy

X-Ray Diffraction From a Sub-Micrometer Bismuth Single Crystalunder a Pressure of Several GPa 172

E.F. Skelton, J.D. Ayers, S.B. Qadri, K.P. Cooper, J.Z. Hu,L.W. Finger and H.K. Mao

Pressure-induced Disordering of Structure in Eu2* Activated Sr-Borates 175

Liu Weina, Liu Hongjian, Feng Yuchen, Sun Shulan,Guan Zhongsu and Su Wenhui

Study on Quasicrystal Formation of AI^Co^Mn^ by Quenchingunder High Static Pressure 178

Yu Richeng, Xu Dapeng, Su Wenhui and Chu Shucheng

The Formation of Quasicrystal in AI077Mn019Yb004 by Quenchingunder High Static Pressure 181Su Wenhui, Xu Dapeng, Xu Xingtang, Yu Richeng and Xing Zhiming

High Pressure X-Ray Studies on LaUx Ba2.x Cu3Oy System 184T.S. Subba Raman, T.S. Sampath Kumar and S. Natarajan

Effect of Pressure on the Lattice Distortion of Indium 187

K. Takemura

High-Pressure X-Ray Diffraction Study of Cesium up to 92 GPa 190K. Takemura, O. Shimomura, and H. Fujihisa

x

Successive Phase Transitions in the Three-DimensionalHalogen-Bridged Mixed-Valence Compound Rb Au Iunder High Pressures

2 2 6

A. Tanaka, H. Sato, N. Kojima, T. Kikegawa and O. Shimomura^

X-Ray Diffraction During Shocks*1QR

R.R. Whitlock and J.S. Wark

The Equation-of-State For PdD0 4at High Pressure

202Ji-an Xu andM.H. Manghnani

Evidence For A T—> T Structure Transition underPressure in La,4Nd06CuO4F. Arrouy, C. Cros, G. Demazeau, O.Schulte and W.B. Holzapfel

Shock Compressibility of Substances at -10 Mbar Pressures 208B.K. Vodolaga

High Pressure Structural Sequences of Group IV Transition Metals 211HuiXia, Yogesh K. Vohra and Arthur L Ruoff

Pressure Raman Scattering in LiRbS04 214F. Camargo, V. Lemos andA.C. Hernandes

A High Pressure Raman Study of Low and High TemperatureForms of Octahalo Cyclic Tetramer, P4N4CI8 217

D. Victor, S. Muthu, N. Chandrabhas, A.K. Sood, P. Venugopalan,K. Venkatesan and A. Jayaraman

High-Pressure Raman and Brillouin Studies of Sulfur Hexafluoride

up to 10 GPa 220

Shigeo Sasaki and Hiroyasu Shimizu

Spectral, Chemical, and Phase Changes at High P and T:

Recent Results for NH3. H20, Ruby, and MgAI204 Spinel* 223

M. Nicol, T.F. Cooney, H. Cynn, A. Koumvakalis, S.K. Sharma and J. Yen

Brillouin and Raman Scattering Studies of Oxide Glasses

under High Pressure 229

John Schroeder, Thomas G. Bilodeau and Susanta K. Saha

XAFS Studies of Perovskite Related Materials at High Pressure 233

R. Ingalls, B. Houser and E.D. Crozier

Raman Spectroscopy at Simultaneous High Pressure and

Temperature: Phase Relations of CaC03 and the Lattice

Dynamics of the Calcite i± CaC03 (II) Phase Transition*

Nancy J. Hess, Subrata Ghose and Gregory J. Exarhos

236

XI

Raman Scattering Study of Phase Transitions in Resorcinol

at High Pressure

S.K. Deb, M.A. Rekha, A.P Roy, V. Vijaykumar, S. Meenakshi

andB.K. Godwal

Raman Study of Pressure Induced Structural Transitions in

Csl04to12GPa 245

N. Chandrabhas, D. Victors. Muthu, A.K. Sood, HI. Bhat

and A. Jayaraman

ESR Investigations of the Ferroelectric Transition in

Ca2 Sr (C2H5COO)6: Mn2t Crystals under Hydrostatic Pressures 248

T.N. Sairam and S. V. Bhat

ESR Studies of Ca2 Pb (C2H6COO)6: Mn2' Single Crystalsunder Hydrostatic Pressures 251

T.N. Sairam and S. V. Bhat

Pressure Induced Glasses (Plenary) 254

S.K. Sikka

Molecular Dynamics Simulations of Pressure Induced Crystal to

Amorphous Transitions in Some Corner Linked PolyhedralCompounds 259

S.L. Chaplot and S.K. Sikka

Orientational Disorder and Pressure Induced Amorphisation in

Lithium Potassium Sulphate* 262

Akhilesh K Arora and T. Sakuntala

High Pressure Phase Transitions in AgGaSe2: A RamanSpectroscopic Study 268Akhilesh K. Arora, T. Sakuntala and L. Artus

Pressure Induced Phase Transition in LiCsS04:A Raman Spectroscopic Study 271M.N. Shashikala, N. Chandrabhas, A.K. Sood and A. Jayaraman

High Pressure Phase Transitions in Silica and Beriinite byMolecular Dynamics Simulations* 274John S. Tse and Dennis D. Klug

Pressure Induced Anomaly at Tc in Metglas 2605A 280V. Shubha and T.G. Ramesh

Pressure Induced Second Order Transition in Nickel 283V. Shubha and T.G. Ramesh

Critical Point For The S-M Transition in Smna,Dyn 10S 286V. Shubha and T.G. Ramesh°82 °18

XII

Effect of Electric Field on Permittivity of Antiferroelectric CupricFormate Tetrahydrate under Hydrostatic Pressure 289Sanji Fujimoto and Ken Kanai

Pressure Induced Semiconductor-to-Metal Transition inthe Three Dimensional Halogen-Bridged Au Mixed-ValenceCompound Rb2Au2l6 292N. Kojima, R. Kato and F. Amita

Structural Phase Transitions and Metallization in the

Three-dimensional Mixed-Valence CompoundsCs2Au2X6 (X = CI, Br, I) under High Pressure 295N. Kojima, H. Kitagawa, T. Kikegawa, O. Shimomura,H. Takahashi and N. Mdri

Crystallization of Semiconducting Chalcogenide Glassesat High Pressures* 298

E.S.R. Gopal

Equilibrium Microstructure Formation During Pressure-inducedPhase Transition* 304

M. Riedel and R. Daessler

The Pressure and Temperature Dependence of the Kinetics of

Crystallization of Amorphous Selenium 310

Murali Mohan and Anil K. Singh

The FCC-BCC Transition in Ytterbium under High Pressurization Rates 313

Anil K. Singh

High Pressure Studies on Mg4CuAI$, Mg3Zn3AI2, Amorphous Ni (P)and Microcrystalline Pd (P) 316

C. Karunakaran, S.N. Vaidya, M.K. Totalani, S.N. Athavale andG.K. Dey

Pressure Effect on Martensitic Transformations in Fe-Ni

and Fe-Pt Invar Alloys 319

S. Nakamichi, R. Tanaka, S. Endo, F. Ono, T. Kakeshita and K. Shimizu

Theoretical High Pressure Studies of the Binary Nitrides* 322

P.E. Van Camp, V.E. Van DorenandJ.T. Devreese

Pressure Variation of the (c/a) Ratio of Zinc from the First

Principles Electron Band Theory

S. Meenakshi, V. Vijayakumar, B.K. Godwal and S.K. Sikka

Group IV B Elements under Pressure: A Comparison between

Theory and Experiments

JyothiS. Gyanchandani, S.K. Sikka and R. Chidambaram

328

331

xm

Theoretical Equation of State of the Primitive Hexagonal Phase

of Silicon 335

A. Neethiulagarajan and V. Vijayakumar

High Pressure Phase Transition in IV-VI Compound Semiconductors* 338R.K. Singh and D.C. Gupta

Effect of High Pressure on Elastic Behaviour of Tin Chalcogenides: SnTe 343

D.C. Gupta and R.K. Singh

OPTICAL PROPERTIES

Spectroscopic Studies on Diamond Anvil under Extreme

Static Stresses (Plenary) 349

Yogesh K Vohra

Refractive Index in a Loaded Diamond Anvil: Possible

Ghost Plasma Edges 359

Arthur L. Ruoff and Huan Luo

Refractive Index of Diamond under Pressu re 362

M.I. Eremets, V.V. Struzhkin, Ju. A. Timofeev, A.N. Utjuzh, A.M. Shirokov

Influence of Paramagnetic Defects on Raman Scattering in

Diamonds of Different Origin 365V.D. Andreyev, T.A. Nachal'naya and Ye. V. Gabrusenok

Fluorescent Spectrum of Ruby under High Pressure and

Pulsed High Magnetic Field 368S. Endo, K. Yamamoto, A. Yamagishi, H. Mikami, H. Hori and M. Date

Luminescence of Sm2+ Ions in Non-Cubic High Pressurea Phase of Divalent Fluorides 371C.S. Yoo, N.C. Holmes andH.B. Radousky

Optical Absorption and Reflection Studies on Sulfur:Evidence for Metallization 374H. Luo, S. Desgreniers, Y.K. Vohra and A.L. Ruoff

High Pressure Photoluminescence Study of Single Crystals of C * 377A.K. Sood

The Emission Spectra of SrB.,0^ X : Eu2+ (X « F, CI)Synthesized under High Pressure

"

383Liu Weina, Sun Shulan, Guan Zhongsu, Gao Diankun,Liu Hongjian and Su Wenhui

Influence of Pressure on the Luminescence of Exchanged Eu (III) :A and Eu (III) :Y Zeolite

386Liu Xiaoyang, Sun Jiayao, Su Wenhui and Pang Wenqin

XIV

High Pressure and Low Temperature Luminescent Spectraand Crystal Parameters of Eu3t in Host Crystal Na5Eu (W04)4 389Chang-Xin Guo, Hong-bin Cui, Bi-lin Li and Yue-fen He

SUPERCONDUCTIVITY

Superconductors and High Pressure* 395E.F. Skelton, N.E. Moulton, S.A. Wolf, D.H. Liebenberg,S.B. Qadri, A.W. Webb andD.D. Berkley

Pressure Dependence of To in the Family YBaCuO 401B. Bucher, E. Kaldis, S. Rusiecki and P. Wachter

The Pressure Dependence of the Magnetic ExchangeInteraction in Eu2Cu04 and YBa2Cu062

404M.I. Eremets, A.A. Maksimov, A.V. Lomsadze, A.V. Puchkov,V.V. Struzhkin, I.I. Tartakovskii

Resistivity Studies on Pr Substituted YBa2Cu307.5under High Pressure 407

S. Arumugam, V. Sankara Sastry and S. Natarajan

Pressure Effects on Modulated Structure in Bi-Based

Superconductors 410

T.S. Sampath Kumar, K. SankarandS. Natarajan

On The Interpretation of High-Pressure Resistivity Results on

Chevrel Phase Compounds and High Tc Superconductors 413

V.S. Sastry, Y. Hariharan, B.K. Guha, M.P. Janawadkar and

T.S. Radhakrishnan

Pressure Induced Phase Transitions in YBa2Cu408 Superconductor 416

B.P. Singh, S.P. Pande, R.K. Nayar, B.V. KumaraswamyandA.V. Narlikar

Thermoelectric Power of YBa2Cu408 under Pressure 419

Sheela K. Ramasesha and Anil K. Singh

Influences of Hot- and Cool-Pressure on Phase Transition of

Structure and Superconductivity in YBa2Cu307^ 422

Wang Yifeng, Su Wenhui, Liu Hongjian, Li Liping and Sun Baoquan

Pressure Dependence of High-Tc Superconductors* 425

Rinke J. Wijngaarden, J.J. Scholtz, E.N. van Eenige, K. Heeck

and R. Griessen

Investigation of Superconductivity in Nb-Ti up to 6GPa 431

S. Arumugam, V.S. Sastry, S. Kalavathi, Y. Hariharan,

S. Natarajan and T.S. Radhakrishnan

xv

Metallisation and Possible Superconductivity in Csl at High Pressure* 434R. Asokamani, G. Subramoniam and Mercy Amirthakumari

Superconductivity of Simple Cubic Antimony under Pressure 437B. Palanivel and M. Rajagopalan

Electronic Structure and Superconductivity of BCC Zirconium

by LMTO Method 440B. Palanivel and M. Rajagopalan

TRANSPORT PROPERTIES

Thermophysics at High Pressure* 445G. Backstrom

Thermopower as a Tool in High Pressure Research* 450T.G. Ramesh and V. Shubha

Thermoelectric Power of Bismuth up to 9 GPa 456Sheela K. Ramasesha, C. Divakar, P.S. Gopalakrishnanand Anil K. Singh

High Pressure Studies of Resistance Anisotropy ofthe Layered Semiconductor InTe

459S. Asokan, E.S.R. Gopal, S. Pal and D.N. Bose

Measurement of the Pressure Dependence of the ElectricalResistance of Nickel at Temperatures up to 750 K 462Murali Mohan, M.A. Parameswara and Anil K. SinghIs There an Anomaly in the Pressure Derivative of Resistivityat Tc in Nickel ?

, 465T.G. Ramesh and V. Shubha

High Pressure Effect on Low Dimensional Conductors* 468S. V. Subramanyam

Effect of Hydrogen Dissolved under High Pressure onLow-Temperature Electrical Resistivities of AmorphousPd/Transition-Metal/Si and Crystalline Pd/Noble-Metal Alloys 474A.W. Szafranski

A Study of High Pressure Behaviour of BulkAs2X3 (X = S, Se, Te) Glasses

477S.S.K Titus, S. Asokan, R. Ramakrishna and E.S.R. GopalElectrical Conductivity and Thermo-Power of GaP and ZnSin the Pressure Range 20-50 GPa

4onA.N. Babushkin * u

XVI

Semimetallic State of Alkali Halides at Pressures Above 20 GPaA.N. Babushkin

483

LIQUID, LIQUID CRYSTALS AND POLYMERS

Fluids at High Shock Pressures and Temperatures (Plenary) 487W.J. Nellis and AC. Mitchell

Fluids with State-Dependent Electronic Structure* 492

F. Hensel, M. Stolz, G. Hohl, C. Pilgrim and R. Winter

Self-Diffusion in Compressed Supercritical Water:

A Molecular Dynamics Study 498A.G. Kalinichev

Combustion and Flames in Supercritical Fluids to 2000 bar* 501

E.U. Franck

Equation of State of Some Normal Alkanes 507

V.K Sachdev

Isothermic Freezing Pressures of Some Binary Dilute Solutions

in Benzene at High Pressures 511

D. Dudek and B. Baranowski

Observations of Triply Reentrant Behavior and

a Multicritical Point in a Single Component Liquid Crystal Systemat High Pressure* 514

V.N. Raja

High Pressure Studies of Materials Exhibiting Fluid to

Hexatic Phase Transitions in Liquid Crystals 520

D.S. ShankarRao, V.N. Raja, S.Krishna Prasad and S. Chandrasekhar

Smectic A-Smectic C-Hexatic B Meeting Point at High Pressure—

A New Multicritical Point 523

Geetha G. Nair, V.N. Raja, S. Krishna Prasad, S. Chandrasekhar

and B.K. Sadashiva

Rotational Viscosity in The Ferroelectric C*Phase—A HighPressure Study 526

S.M. Khened, S. Krishna Prasad. V.N. Raja, S. Chandrasekhar

and B. Shivkumar

Effect of Pressure on the Spontaneous Polarisation,the Critical Unwinding Field and the Transverse Dielectric

Constant in Ferroelectric Liquid Crystals 529

S. Krishna Prasad, S.M. Khened, V.N. Raja, S. Chandrasekhar

and B. Shivkumar

XVII

Brillouin Scattering of Lubricating Oils under High Pressure 532

Y. Nakamura, I. Fujishiro and T. Tamura

Structure of Liquid Bismuth under Pressure 535

K Yaoita, K Tsuji, Y. Katayama, J.Q. Chen, N. Koyama,T. Kikegawa and O. Shimomura

Is There a Unique Equation of State for an Elastomer ?* 538

D.P. Dandekar and J.L. Green

CHEMICAL REACTIONS AND CRYSTAL GROWTH

Can Steric Hindrance Be Overcome in an Organic Reaction?A Pressure Answer* 547

G. Jenner

High Pressure Dimerization of a Gem-disubstituted Cyclopropene.Evidence of Cyclopropene-Vinylcarbene Equilibrium 553M. Miesch, F. Barth, M. Franck-Neumann and G. Jenner

Pressure-induced Retardation of Steric Isomerizations

in Highly Viscous Media 556K Cosstick, T. Asano and N. Ohno

Study by Xanes Spectroscopy of Bromine Organic Compoundsunder High Pressure 559F. Cansell, D. Fabre, J.P. Petitet, J. P. Itie and A. Fontaine

Influence of Oxygen Pressure on the Stoichiometry, StabilityRange and Superconducting Properties of the T/O TypeLa2_xNdxCu 04+6 Solid Solution 562F. Arrouy, A. Wattiaux, C. Cros and G. Demazeau

Unusual Oxidation States of Transition Elements 565G. Demazeau, S.H. Byeon andJ.H. Choy

Spectacular Increase in the Rate of High Pressure Diels-AlderReactions Over a Narrow Pressure Range 569R.W.M. Aben, J.A. KeijsersandJ.W. Scheeren

High Pressure Synthesis of Nd2_xCexCu04 Samples andTheir Properties 573Liu Hongjian, Li Liping7 Wang Yifeng and Su Wenhui

Megabar Chemistry 576Arthur L Ruoff

Fluorescence Spectra of Some Laser Dyes at High Pressures 579A.P.G. Kutty, S. Venkateswaran, S.N. Vaidya and V.B. Kartha

XVIII

Crystal Growth of Semiconductors and Superconductors underHigh Gas Pressure*

S. Porowski, I. Grzegory and A. Morawski

GEO AND PLANETARY SCIENCE

582

Advances in High Temperature Research in Diamond Cells(Frontier lecture)

591R. Boehler

Miscibility of Hydrogen and Helium Mixtures at Megabar Pressures* 601J.E. Klepeis, K.J. Schafer, T.W. Barbee III and M. Ross

High Pressure Properties of Silicates and Consequences for

Planetary Evolution*606

S. Franck

Infrared Studies of Glasses and Crystals of Olivine Compositionsat High Pressures $11S.-Y. Wang, T.F. Cooney and S.K. Sharma

Effect of High P and High T on Olivines—A Raman Spectral Study 614S.K. Sharma, T.F. Cooney and S.-Y. Wang

Modelling of Shock Wave Motion in Quartz-Containing Rocks

by Equilibrium Model 620

B.K. Vodolaga

Synthesis of Quartz under Hydrothermal Conditions: A Comparison 623

R.S. Rawat

Solubility of Chlorine in the Leuco-Granitic Melt at 5 Kbar Pressure

and 800°C-1000°C Temperature 626

R.S. Rawat and D.H. Green

Techniques of Trapping the Synthetic Fluid Inclusions from

a Leucogran'rte in the Quartz Discs at High P-T Conditions 629

R.S. Rawat and D.H. Green

Research on Transformation of ZSM-5 Zeolite under High Pressure

and Temperature 632

LiuXiaoyang, Su Wenhui, Wang Yifeng and Zhao Xudong

Thermobaric Dependences of Physical Parameters of Rocks

and Petrophysical Models of the L'rthosphere 63S

T.S. Lebedev

xix

SUPERHARD MATERIALS

Shock-compression Properties of Ceramics (Plenary) 641

D. Grady

Treatment of Advanced Materials by High Dynamic Pressures* 651

V.F. Nesterenko

New Crystalline Forms of Diamond Produced by a Rapid Cooling

Technique under Shock Compression 656

K. Kondo and H. Hirai

Synthesis of Diamond by Explosive Methods 659

B.K. Vodolaga, A.T. Sapozhnikov and LI. Filatov

Shock-wave Fabrication of Nanocrystalline Materials* 662

K Kondo

Synthesis and Properties of Isotopically Pure (Isopure)Diamond Single Crystals 668

Suresh S. Vagarall and William F. Banholzer

Some Features of the Growth Process of Diamond at High Pressure* 671

M. Wakatsuki

Experimental Simulation of Diamond Genesis 676

A.I. Chepurov and I.I. Fedorov

The Behavior of (i-C) and (a-C) Diamond-like Films andPressures up to 80 GPa 678V. Andreyev and A. Goncharov

New Routes for Preparing Cubic Boron Nitride: Synthesis andCrystal Growth* 681G. Demazeau

New Concept of the Synthesis of Cubic Boron Nitride* 687Satoshi Nakano and Osamu Fukunaga

On the Use of Non-conventional Catalyst Solvent on theSynthesis of Cubic Boron Nitride 692MM Bindal, B.P. Singh, R.K. Nayar, S.K. Singhal and R. Chopra

Sintering of Silicon Carbide and Silicon Nitride under High Pressureand High Temperature 695C. Divakar, O.N. Gregoriev, S.S. Dzhamarov,A.V. Bochko and Anil K Singh

XX

MECHANICAL BEHAVIOUR AND PROCESSING OF MATERIALS

Dislocation Mechanics and Shock Deformation* 701

V. Ramachandran, R.W. Armstrong, D.D. Barker, C.S. CoffeyR.D. Dick, W.H. Holt, J.B. McKirgan, W. Mock, Jr., W.G. Sop'erJ.D. Williams, F.J. Zerilli and X.J. Zhang

Shock Compression of Gas-saturated Powder Materials 709

N.S. Kostyukovand Yu.D. Shishkin

On the Oblique Collisions of the Metallic Plates at Extreme Conditions* 712

A.A. Deribas, A.I. Culidov, B.S. Zlobin, V.V. Kiselev, V.M. Fomin,

I.I. Shabalin and A.A. Shterzer

A Nontraditional Piercing Process Using High Pressure 719

Y. Kurosaki

Effect of Plastic Deformation at High Pressures and Low Temperatures

on Structure and Properties of Materials 722

N.V. Shishkova, V.M. Shepel and E.N. Malyshev

Phase Transformation and Strengthening of Metastable Fe-Mn

Steels under High Pressures 725

8.M. Efros, S.V. GladkovskiyandS.V. Smirnov

Pressure Treatment of Two-phase Titanium Alloys 728

B.M. Efros, T.P. Zaika, Yu.T. Antonishin andA.A. Popov

Effect of Deformation under Pressure on Structure and Propertiesof bcc and hep Polycrystals

731

B. Efros, L. Loladze and V. Yushkov

On Viscous Destruction of Materials under Pressure 734

Ya. Beigelzimer, L. Loladze and B. Efros

HIGH PRESSURE TECHNIQUES

Hypervelocity Launch Capabilities to over 10 Km/s* 739

Lalit C. Chhabildas

Response of Shock-loaded Ceramics Determined with

In-Material Manganin Gauges*747

N.S. BrarandZ. Rosenberg

Angle Dispersive Powder Diffraction Techniques for

Crystal Structure Refinement at High Pressure (Plenary) 753

R.J. Nelmes, P.O. Hatton, M.I. McMahon, R.O. PiltzandJ. Crain

Miniature Diamond Anvil Cells763

M.I. Eremets, A.M. Shirokov and A.V. Lomsadze

xxi

A Miniature Clamp Type Diamond Anvil Cell for X-Ray and

Optical Measurements766

V. Vijayakumar, S. Meenakshi, B.K. Godwal, S.K. Sikka

and R. Chidambaram

X-Ray Diffraction in the 500 GPa Range: Prospects for

Attaining 1 TPa (Plenary)769

Arthur L. Ruoff

Is a Static Pressure of 1 TPa Possible ? 779

Arthur L Ruoff and Huan Luo

Uniaxial Stress Component in Au in Au-Zr Mixture

Compressed up to 30 GPa782

AnilK. Singh, Kalyani Vijayan, HuiXia, Yogesh K. Vohra

and Arthur L. Ruoff

The Peak Position and the Profile Near the Peak of an

X-Ray Diffraction Line from a Specimen under Pressure Gradient 786

Anil K. Singh

Theory of Response of Ruby Fluorescence to External Stresses* 790

grinder M. Sharma and Y.M. Gupta

The 250 GPa Limit of the Ruby Pressure Gauge 798

Arthur L. Ruoff

Estimation of Pressure in the Diamond Anvil Cell with

"Rounded-Cone-Plane" Anvils 801

A.N. Babushkin

On High Pressure Standards* 803

B.K. Godwal and Raymond Jeanloz

Simple Sapphire Ball Cell for High Pressure Studies in the Ultraviolet 809

W.B. Daniels, M. Lipp, D. Strachan, D. Winters andZu-he Yu

Optical Fibers in Liquid-Crystal High-Pressure Sensing 812

Tomasz R. Wolinski and Wojtek J. Bock

Universal Stress Generating Device for Investigations of Optical Fibers 815

Roland Wisniewski and Wojtek J. Bock

Computer Aided Technique for the Determination of Ultrasonic Transit Time 818

C. Divakar, B.S. Adiga and AnilK. Singh

Density Measurements of Te under High Pressure 821

V. Katayama, K Tsuji, K Yaoita, J.-Q. Chen, N. Koyama,T. Kikegawa and O. Shimomura

XXII

ANew Apparatus to Conduct Variable Temperature High PressureMossbauer Spectroscopy*

y r,essure

C.A. McCammon 824

827

Pressure Behaviour of 200-t Cubic Press Below 2.5 GPaat Room TemperatureMM Bindal, B.P. Singh, R.K. Nayar, S.K. Singhal and Rajeev Chopra

A High Resolution Resistivity and Thermopower Set Up for

High Pressure-High Temperature Studies Mf)

V. Shubha and T.G. Ramesh

An IBM-PC Add-on Card for Automated High Pressure HighTemperature Resistivity Measurements 834

J. Jayapandian, B. Purniah, CM Chittaranjan, P.Ch. Sahu,O.K. Sheela andKP. Gopinathan

Effect of Pressure Transmitting Fluids on the Accuracy of

Pressure Measurement* 837

J.K.N. Sharma

A Comparative Study of Pneumatic Pressure Measurements

to 1 MPa by Different Primary Methods 843

K. Jain, C. Ehrlich, J. Houck, B. Welch and J.K.N. Sharma

An Approach to the Use of Controlled Clearance Piston Gagesin Different Modes 846

K. Jain, C. Ehrlich and J. Houck

Determination of Argon Triple Point Pressure 849

A.K. Bandyopadhyay, J.K.N. Sharma, W. BlankeandJ. Jager

A Systematic Study on the Effective Area of the

Piston Gauges with Four Different Gases up to 5 MPa 852

J.K.N. Sharma and A.K. Bandyopadhyay

MISCELLANEOUS

NMR at Pressures up to 10 GPa: Probing Electronic Structures

and Diffusion in Alkali Metals*857

D. Brinkmann

Shock-induced Radiation Related to the Shear Bands in Fused Quartz 863

K. Kondo and T. Hiramatsu

Shock Compressibility of the TATB-based Explosive Composition

in the Pressure Range from 0,1 to 40 GPa

E. V. Shorohov and B. V. Litvinov

866

XXIII

Shock Waves Configurations in Cylindrical Loading Arrangements(Computer Simulation) 869V. Andreyev, N. Nikityuk and O. Leshchenko

Theoretical Calculation of the Bulk Modulus of the C^Molecule and Crystal* 872

Rodney S. Ruoff

Pressure Induced Elastic Anomaly in Zn 878

SurinderM. Sharma, S.K. Sikka and R. Chidambaram

Pressure Dependence of the Elastic Constants of PolycrystallineTitanium Diboride 881

A. Abbate, J. Frankel and D. Dandekar

Elastic Properties of Ge-Sb-Se Glasses under Pressure 884C. Divakar and Anil K Singh

Elastical Properties on High Tc Superconductor (YBajCUgO^Composites at High Pressures up to 0.4 GPa 887

Ru-ju Wang, Ji-an Xu, and Murli H. Manghnani

Measurement of the Velocity of Sound in Aqueous Solutions of

NaOH between 20 and 350°C and 0.1 and 300 MPa 890

J.-P. PetitetandD. Vrel

Pressure-tuning Infrared Spectroscopic Study of Human Cancers:Structural Modifications at the Molecular Level* 893

P.T.T. Wong

On Possibility of Coherent Nuclear Reactions at AtmosphericPressure and at High Pressures* 899S.N. Vaidya

Effects of Hydrostatic Pressure on the Shear Properties on

Graphite/Epoxy Composite Material* 904K.D. PaeandE.S. Shin

Density Change Corrections for the Transformed VolumeFraction Obtained from Resistometry 913Murali Mohan and Anil K Singh

Author Index gi7

xxiv