Structure of Cd12.7(1)Sb10
| Autor: | Haiying Bie, Oksana Ya. Zelinska, Arthur Mar |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Cadmium
Materials science General Chemical Engineering chemistry.chemical_element General Chemistry Zinc Thermoelectric materials Metal Crystallography chemistry Electrical resistivity and conductivity visual_art Phase (matter) Materials Chemistry visual_art.visual_art_medium Composition (visual arts) Stoichiometry |
| Zdroj: | Chemistry of Materials. 19:1518-1522 |
| ISSN: | 1520-5002 0897-4756 |
| Popis: | The cadmium analogue of the thermoelectric material "β-Zn 4 Sb 3 " has been prepared by reaction of a mixture of the elements with nominal stoichiometry "Cd 57 Sb 43 " at 430 °C. The composition of this phase, previously assumed to be "Cd 4 Sb 3 " in analogy to "β-Zn 4 Sb 3 ", has been determined to be approximately Cd 12.7 (1)Sb 10 , in agreement with recently revised formulations for the zinc analogue, which is now better described as Zn 13 Sb10. Single-crystal X-ray diffraction studies at 295 K showed that the structure of Cd 12.7 Sb 10 (space group R3c, Z = 6, a = 13.0395(14) A, c = 13.0346(14) A) is similar to that of Zn 13 -Sb10, but with a more complex set of interstitial metal sites. The structure remains unchanged at 193 K. The electrical resistivity of Cd 12.7 Sb 10 decreases linearly with decreasing temperature and shows a modest upturn near 35 K. |
| Databáze: | OpenAIRE |
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