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Biagioni, C. & Moelo, Y. (2017) Lead-antimony sulfosalts from Tuscany (Italy). XVIII. New data on the crystal-chemistry of boscardinite. Mineral. Mag. 81 47–60.
Added by: Richard Baschera (2017-04-03 12:21:46) Last edited by: Richard Baschera (2017-04-03 12:36:33) |
| Type de référence: Article DOI: 10.1180/minmag.2016.080.068 Numéro d'identification (ISBN etc.): 0026-461X Clé BibTeX: Biagioni2017 Voir tous les détails bibliographiques  |
Catégories: IMN, INTERNATIONAL Mots-clés: Apuan Alps, arsiccio mine occurrence, binn valley, boscardinite, chabourneite, Italy, jas roux, lengenbach quarry, Monte Arsiccio mine, sartorite, sartorite homologous series, series, silver, sulfosalt, switzerland, thallium, tuscany Créateurs: Biagioni, Moelo Collection: Mineral. Mag. |
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| Résumé |
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{Boscardinite, ideally TlPb4(Sb7As2)(Sigma 9)S-18, has been described recently as a new homeotypic derivative of baumhauerite, found at Monte Arsiccio mine, Apuan Alps, Tuscany, Italy. New findings of boscardinite in different mineral associations of this deposit have allowed the collection of new crystal-hemical data. Electron-microprobe analysis of the crystal used for the single-crystal X-ray diffraction study gave (in wt.%): Ag 1.81(5), Tl 12.60(21), Pb 17.99(12), Hg 0.14(5), As 9.36(12), Sb 33.60(27), S 23.41(30), Cl 0.06(1), total 98.97(100). On the basis of Sigma Me = 14 apfu, it corresponds to Ag0.42Tl1.52Pb2.14Hg0.02 (Sb6.82As3.08)(Sigma 9.90)S18.04Cl0.04. With respect to the type specimen, these new findings are characterized by a strong Pb depletion, coupled with higher Tl contents, and a significant As enrichment. The single-crystal X-ray diffraction study of this (Tl, As)-enriched boscardinite confirms the structural features described for the type sample. The unit-cell parameters are a = 8.1017(4)
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