ChemInform Abstract: Structure and Low Temperature Physical Properties of Ba8Cu6Ge40

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Electric propertiesD 8000 Structure and Low Temperature Physical Properties of Ba8Cu6Ge40. — The title

compound (actual composition Ba8Cu6.32Ge38.48) is prepared from the elements (1073 K, 240 h) and characterized by powder XRD, magnetization, heat capacity, elec-trical resistivity, Seebeck coefficient, and thermal conductivity measurements. It crys-tallizes with clathrate structure in the space group Pm3n. The material is diamagnetic and exhibits low thermal conductivity, high thermoelectric power, and low electrical conductivity. The maximum figure of merit is 0.0074 at 300 K. For potential thermo-electric applications, the electrical conductivity needs to be improved. — (ZHANG, H.; ZHAO*, J.-T.; TANG, M.-B.; MAN, Z.-Y.; CHEN, H.-H.; YANG, X.-X.; J. Alloys Compd. 476 (2009) 1-2, 1-4; State Key Lab. High Perform. Ceram. Superfine Microstruct., Shanghai Inst. Ceram., Shanghai 200050, Peop. Rep. China; Eng.) — W. Pewestorf

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ChemInform 2009, 40, issue 31 © 2009 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim