The role of silver on the stabilization of the incommensurately modulated structure in calaverite, AuTe2
Bindi, Luca; Arakcheeva, Alla; Chapuis, Gervais
2009

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Abstract

Structural investigations of several minerals belonging to the calaverite group with composition Au1–xAgxTe2 (x = 0.00, 0.02, 0.05, 0.09, 0.19, and 0.33) indicate that Ag is randomly distributed on the Au sites. This suppresses the valence fluctuation of Au and, therefore, the structure modulations. The results are compared with the previously published incommensurately modulated structure of calaverite, Au0.9Ag0.1Te2, which is characterized by valence fluctuations of Au reinforced by an ordered distribution of Ag. The (3+1)-dimensional calaverite structure type is able to reproduce both (3+1)D and 3D related structures with the general formula AB2 (A = Au, Ag, Cu, Nb, Ta; B = Te). Keywords: Calaverite, modulated structure, valence fluctuations, krennerite

Details

Title The role of silver on the stabilization of the incommensurately modulated structure in calaverite, AuTe2
Author(s) Bindi, Luca ; Arakcheeva, Alla ; Chapuis, Gervais
Published in American Mineralogist
Volume 94
Issue 5-6
Pages 728-736
Date 2009
Publisher Mineralogical Society of America
ISSN 0003-004X
Keywords
DOI https://doi.org/10.2138/am.2009.3159
Other identifier(s) View record in Web of Science
Laboratories LCR
Record Appears in Scientific production and competences > SB - School of Basic Sciences > IPHYS - Institute of Physics > LCR - Laboratory of Cristallography
Peer-reviewed publications
Work produced at EPFL
Journal Articles
Published
Record creation date 2015-08-24

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