Structure of Cd 12.7(1) Sb 10
2007; American Chemical Society; Volume: 19; Issue: 6 Linguagem: Inglês
10.1021/cm0629659
ISSN1520-5002
AutoresOksana Ya. Zelinska, Hai-Ying Bie, Arthur Mar,
Tópico(s)Phase-change materials and chalcogenides
ResumoThe cadmium analogue of the thermoelectric material "β-Zn4Sb3" has been prepared by reaction of a mixture of the elements with nominal stoichiometry "Cd57Sb43" at 430 °C. The composition of this phase, previously assumed to be "Cd4Sb3" in analogy to "β-Zn4Sb3", has been determined to be approximately Cd12.7(1)Sb10, in agreement with recently revised formulations for the zinc analogue, which is now better described as Zn13Sb10. Single-crystal X-ray diffraction studies at 295 K showed that the structure of Cd12.7Sb10 (space group R3̄c, Z = 6, a = 13.0395(14) Å, c = 13.0346(14) Å) is similar to that of Zn13Sb10, but with a more complex set of interstitial metal sites. The structure remains unchanged at 193 K. The electrical resistivity of Cd12.7Sb10 decreases linearly with decreasing temperature and shows a modest upturn near 35 K.
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