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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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References

Geller, S. and Wernick, J.H. (1959) Ternary semiconducting compounds with sodium chloridc-like structures: AgSbS2, AgSbTc2, AgBiS2 and AgBiSe2. Acta Crystallogr., 12, 46–54.CrossRefGoogle Scholar
Graham, A.R. (1951) Matilditc, aramayitc, miargyritc. Amer. Mineral., 36, 436—49.Google Scholar
Hall, H.T. (1966) The systems Ag-Sb-S, Ag-As-S and Ag-Bi-S: phase relations and their mineralogical significance.Unpublished Ph.D. thesis, Brown University, USA.Google Scholar
Hofmann, W. (1938) Die struktur von miargyrit, AgSbS2- Sitz. Preuss. Akad. Wiss. Phys. Math. KL VI, 111–9.Google Scholar
Keighin, C.W. and Honea, R.M. (1969) The system Ag- Sb-S from 600°C to 200°C. Mineral. Depositay 4, 153–71.Google Scholar
Knowles, C.R. (1964) A redetermination of the structure of miargyrite, AgSbS2. Acta Crystallogr., 17, 847–51.CrossRefGoogle Scholar
Lcvanyuk, A.P., Osipov, V.V., Sigov, A.S. and Sobyanin, A.A. (1979) Change of defect structure and the resultant anomalies in the properties of materials near phase transition points. Sov. Phys. JEPT, 49, 176–88.Google Scholar
Matsumoto, T. and Nowacki, W. (1968) The crystal structure of trechmannitc, AgAsS2. Z Krist. Min., 129, 163–77.CrossRefGoogle Scholar
Pattrick, R.A.D. and Hall, A.J. (1983) Silver substitution into zinc, cadmium, and iron tetrahedrites. Mineral Mag. 47, 441–51.CrossRefGoogle Scholar
Roland, G.W. (1968) Synthetic irechmannite. Amer. Mineral.y 53, 1208—14.Google Scholar
Shannon, R.D. (1981) in Structure and Bonding in Crystals(O'Keeffe, M. and NavroLsky, A., eds.), Academic Press, 55—70.Google Scholar
Strukov, B.A., Tavaskin, S.A., Minaeva, K.A. and Fcdorikh, V.A. (1980) Critical phenomena in perfect and imperfect TGS crystals. Ferroelectrics, 25, 399–402.CrossRefGoogle Scholar