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Biagioni, C., Moelo, Y., Perchiazzi, N., Demitri, N. & Zaccarini, F. (2019) Parapierrotite from the Monte Arsiccio mine (Apuan Alps, Tuscany, Italy): occurrence and new data on its crystal-chemistry. Eur. J. Mineral. 31 1055–1065.
Added by: Richard Baschera (2020-01-20 08:48:56) Last edited by: Richard Baschera (2020-01-20 08:50:28) |
| Type de référence: Article DOI: 10.1127/ejm/2019/0031-2865 Numéro d'identification (ISBN etc.): 0935-1221 Clé BibTeX: Biagioni2019 Voir tous les détails bibliographiques  |
Catégories: IMN, INTERNATIONAL Mots-clés: (tuscany, antimony, Apuan Alps, crystal structure, lead-antimony sulfosalts, mercury-arsenic sulfosalts, Monte Arsiccio mine, parapierrotite, pierrotite, pyrite, routhierite, sulfosalt, thallium Créateurs: Biagioni, Demitri, Moelo, Perchiazzi, Zaccarini Collection: Eur. J. Mineral. |
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| Résumé |
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{A new finding of parapierrotite from the Monte Arsiccio mine, Apuan Alps, Tuscany, Italy, is reported here. Parapierrotite was identified in two different samples, as striated prismatic crystals, black in colour, ranging from 0.05 to 0.5 mm in length. In the studied specimens, parapierrotite is associated with sphalerite, zinkenite, tetrahedrite, and routhierite or with stibnite, protochabourneite, and routhierite. Chemical analysis indicated the presence of a Pb-bearing variety of parapierrotite; the electron microprobe data are (average of 15 spot analyses - in wt%): Tl 17.06(33), Pb 3.64(55), As 0.09(7), Sb 56.07(38), S 23.94(13), total 100.80(34). On the basis of Sigma Me = 6 atoms per formula unit, the chemical formula of Pb-bearing parapierrotite from the Monte Arsiccio mine is Tl0.89(1)Pb0.19(3)(Sb4.91(13)As0.01)(Sigma 4.)S-92(7).96(36), ideally Tl0.9Pb0.2Sb4.9S8. Its crystal structure study gave a monoclinic unit cell, space group Pn, with a = 8.1005(14)
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