Title

An Antimony-121 Mössbauer Spectral Study of α-Zn4Sb3

Abstract

The Mössbauer spectra of α-Zn4Sb3, a compound that is best formulated as α-Zn13Sb10 or (Zn2+)13(Sb3-)6(Sb2 4-)2, have been measured between 5 and 120 K. The resulting six spectra have been simultaneously fit with two components in the ratio of 3:2 corresponding to the Sb3- and Sb2- ions identified in this valence semiconductor. The fits yield temperature independent isomer shifts of -8.17(2) and -9.73(2) mm/s and quadrupole interactions of -4.9(2) and 0 mm/s for the Sb3- and Sb2- ions, respectively; the corresponding Mössbauer temperatures are 197(5) and 207(5) K, temperatures that are lower than the Debye temperature of ß-Zn4Sb3. The isomer shifts correspond to electronic configurations between 5s25p6 and 5s1.755p 4.01 for the Sb3- ions and between 5s25p 5 and 5s1.805p3.38 for the Sb2- ions, configurations that are in good agreement with the expected configurations for this valence semiconductor and with the results of band structure calculations.

Department(s)

Chemistry

International Standard Serial Number (ISSN)

201669

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2007 American Chemical Society (ACS), All rights reserved.

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