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Cadmium substitution in miargyrite (AgSbS2) and related phases: an experimental reconnaissance

Published online by Cambridge University Press:  05 July 2018

I. Kelleher ,
S. A. T. Redfern  and
R. A. D. Pattrick
I. Kelleher
Affiliation:
Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge, UK
S. A. T. Redfern
Affiliation:
Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge, UK
R. A. D. Pattrick
Affiliation:
Department of Earth Sciences, The University of Manchester, Manchester, M13 9PL, UK
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Abstract

An experimental study of cadmium substitution into AgXS2 phases (X = As, Bi, Sb) indicates significant amounts of cadmium can be incorporated in the structure by the mechanism 2Cd ⇌ Ag + X. The limit of substitution of Cd in the high-temperature polymorph of miargyrite, β-AgSbS2 is 6.2 at.%, whereas the low-temperature polymorph, α-AgSbS2, can accommodate at least 12 at.% cadmium. Substitution of Cd into the cubic β-AgSbS2 induces a small monoclinic distortion and the unit cell becomes pseudo-cubic. The α ⇌ β transition in Cd-substituted miargyrites is modified by the solute ions, with both a reduction of Tc and transition smearing evident. Similar effects are also recorded in Cd-substituted AgAsS2 and AgBiS2.

Keywords

cadmium substitutionmiargyriteAsBiSb
Type
Mineralogy
Information
Mineralogical Magazine , Volume 60 , Issue 400 , June 1996 , pp. 393 - 401
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1996

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