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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
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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.
Consultations : 2/511
Indice de consultation : 4%
Indice de popularité : 1%
{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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