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Synthesis and Rietveld refinement of skutterudite-related phase CoSn1.5Te1.5

Published online by Cambridge University Press:  29 February 2012

F. Laufek ,
J. Návrátil  and
V. Goliáš
F. Laufek*
Affiliation:
Czech Geological Survey, Geologická 6, 152 00 Praha 5, Czech Republic
J. Návrátil
Affiliation:
Joint Laboratory of Solid State Chemistry of IMC AS ČRand University of Pardubice, Studentská 84, 532 10 Pardubice, Czech Republic
V. Goliáš
Affiliation:
Faculty of Science, Charles University, Albertov 6, 128 43 Praha 2, Czech Republic
*
a)Author to whom correspondence should be addressed. Electronic mail: frantisek.laufek@geology.cz
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Abstract

Crystal structure of the skutterudite-related phase has been refined by the Rietveld method from X-ray powder diffraction data. Refined crystallographic data for CoSn1.5Te1.5 are a=12.9063(2) Å, c=15.7837(3) Å, V=2276.89(4) Å3, space group R3 (No. 148), Z=24, and Dx=7.50 g/cm3. The crystal structure of the title compound can be viewed as a modification of the skutterudite structure (CoAs3)—it is isostructural with CoGe1.5Te1.5 and IrSn1.5Te1.5. In the structure of CoSn1.5Te1.5, the Sn and Te atoms exhibit long-range ordering, which results in lowering of the original cubic symmetry of the skutterudite structure to the trigonal one.

Keywords

CoSn1.5Te1.5X-ray powder diffraction dataRietveld refinementskutterudite
Type
Technical Articles
Information
Powder Diffraction , Volume 23 , Issue 1 , March 2008 , pp. 15 - 19
Copyright
Copyright © Cambridge University Press 2008

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