Cd13-xInySb10 (x approximate to 2.7, y approximate to 1.5): An Interstitial-Free Variant of Thermoelectric beta-Zn4Sb3
2009 (English)In: Chemistry - A European Journal, ISSN 0947-6539, E-ISSN 1521-3765, Vol. 15, no 27, 6704-6710 p.Article in journal (Refereed) Published
Although free from structural disorder, the new intermetallic compound Cd13−xInySb10 (see figure) displays similarly low thermal conductivity values as disordered thermoelectric β-Zn4Sb3 with an isostructural framework.
Cd13−xInySb10 (x≈2.7, y≈1.5) was synthesized in the form of mm-sized crystals from reaction mixtures containing excess cadmium. The intermetallic compound crystallizes in the rhombohedral space group Rm with a=12.9704(4), c=12.9443(5) Å, V=1886.0(1) Å3, Z=3 and is isostructural to thermoelectric β-Zn4Sb3 and β-Cd4Sb3. However, in contrast to these last two compounds Cd13−xInySb10 is free from interstitial atoms and does not display any temperature polymorphism. The electrical resistivity of Cd13−xInySb10 is considerably higher than that of Zn4Sb3 and Cd4Sb3 although the temperature behavior remains that of a metal. The thermal conductivity of Cd13−xInySb10 is low, with room-temperature magnitudes around 0.8 W m−1 K−1, which is comparable to disordered or complex structured Cd4Sb3 and Zn4Sb3.
Place, publisher, year, edition, pages
2009. Vol. 15, no 27, 6704-6710 p.
antimony, cadmium, heterometallic complexes, indium, semiconductors, thermoelectrics
Research subject Inorganic Chemistry
IdentifiersURN: urn:nbn:se:su:diva-36345DOI: 10.1002/chem.200802695OAI: oai:DiVA.org:su-36345DiVA: diva2:289282