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Low-temperature structural transitions in the phonon-glass thermoelectric material beta-Zn4Sb3: Ordering of Zn interstitials and defects
KTH, School of Information and Communication Technology (ICT), Material Physics, Material Physics, MF.ORCID iD: 0000-0002-9858-6235
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2007 (English)In: Chemistry of Materials, ISSN 0897-4756, E-ISSN 1520-5002, Vol. 19, no 4, 834-838 p.Article in journal (Refereed) Published
Abstract [en]

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 beta-Zn4Sb3 undergoes a phase transition at 254 K to ordered alpha-Zn4Sb3, which has an ideal composition Zn13Sb10. Below 235 K, a second low-temperature phase (alpha'-Zn4Sb3) can be detected. The sequence of phase transitions beta-alpha-alpha' is reversible. The alpha-alpha' transformation originates from a slight Zn deficiency with respect to Zn13Sb10. The actual composition of Zn4Sb3 is Zn13-delta Sb10.

Place, publisher, year, edition, pages
2007. Vol. 19, no 4, 834-838 p.
Keyword [en]
zn4sb3, alpha-zn4sb3, zinc
URN: urn:nbn:se:kth:diva-16380DOI: 10.1021/cm062384jISI: 000244161800027ScopusID: 2-s2.0-33947153872OAI: diva2:334422
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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