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The effect of As-Sb substitution in the Raman spectra of tetrahedrite-tennantite and pyrargyrite-proustite solid solutions

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Abstract:

Raman spectra of 17 fahlore samples (tetrahedrite-tennantite solid solution series) and 3 samples of the pyrargyrite-proustite solid solution series were recorded. The fundamental stretching and bending vibrations of the pyramidal (Sb, As)S3 groups occur between 200 and 400 cm−1. The position, shape, relative intensity and appearance of the bands vary depending upon the Sb/(Sb+As) ratios of both mineral series. The symmetric stretching mode (v 1) shows a two-mode behavior in the tetrahedrite-tennantite solid solution series, whereas one-mode behavior is observed in all other cases. The excellent correlations between the positions of the vibrational modes and the Sb/(Sb+As) ratio, can be applied to determine the composition of the investigated sample by at least one band in the Raman spectrum of the mineral.

Keywords: FAHLORE; PYRAMIDAL(AS; PYRARGYRITE-PROUSTITE SOLID SOLUTION; RAMAN SPECTROSCOPY; SB)S3 GROUP; TETRAHEDRITE-TENNANTITE SOLID SOLUTION

Document Type: Research Article

DOI: https://doi.org/10.1127/0935-1221/2007/0019-1737

Publication date: 2007-08-01

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  • The European Journal of Mineralogy publishes original papers, review articles and letters dealing with the mineralogical sciences s.l. These include primarily mineralogy, petrology, geochemistry, crystallography and ore deposits, as well as environmental, applied and technical mineralogy. Nevertheless, papers in any related field, including cultural heritage, will be considered.
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