Low-Temperature Structural Transitions in the Phonon-Glass Thermoelectric Material β-Zn4Sb3: Ordering of Zn Interstitials and Defects
Chemistry of Materials2007Vol. 19(4), pp. 834–838
Citations Over TimeTop 10% of 2007 papers
Johanna Nylén, Sven Lidin, Magnus Andersson, Bo B. Iversen, Hongxue Liu, Nate Newman, Ulrich Häußermann
Abstract
The low-temperature phase transitions of thermoelectric Zn4Sb3 have been characterized using single-crystal X-ray diffraction, electrical resistance, and thermal conductivity measurements. Room-temperature stable, disordered β-Zn4Sb3 undergoes a phase transition at 254 K to ordered α-Zn4Sb3, which has an ideal composition Zn13Sb10. Below 235 K, a second low-temperature phase (α‘-Zn4Sb3) can be detected. The sequence of phase transitions β−α−α‘ is reversible. The α−α‘ transformation originates from a slight Zn deficiency with respect to Zn13Sb10. The actual composition of Zn4Sb3 is Zn13-δSb10.
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