TILLMANNSITE, (AG3HG)(V,AS)O4, A NEW MINERAL: ITS DESCRIPTION AND CRYSTAL STRUCTURE
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dc.contributor.author | Sarp H. | |
dc.contributor.author | Pushcharovsky D.Yu. | |
dc.contributor.author | Zubkova N.V. | |
dc.contributor.author | MacLean E.J. | |
dc.contributor.author | Teat S.J. | |
dc.date.accessioned | 2021-11-23T00:58:45Z | |
dc.date.available | 2021-11-23T00:58:45Z | |
dc.date.issued | 2003 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=13439774 | |
dc.identifier.citation | European Journal of Mineralogy, 2003, 15, 1, 177-180 | |
dc.identifier.issn | 0935-1221 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/32397 | |
dc.description.abstract | Tillmannsite, (Ag3Hg)(V,As)O4, was found in the old copper mines of Roua (Alpes-Maritimes, France), associated with pecoraite, vésigniéite, olivenite, kolfanite, janggunite, chlorargyrite, cuprite, native copper, native silver, native silver containing 2 % of mercury, domeykite, djurleite and algodonite. It forms aggregates (0.2 mm diameter) consisting of pseudooctahedral crystals (50μm maximum dimension). The crystals are red, brownish red. The mineral is tetragonal, I4, a = 7.727(7) Å, c = 4.648(5) Å, V = 277.5(5) Å3, Z = 2 and Dcalc = 7.733(3) g/cm3. The strongest lines in the X-ray powder diffraction pattern (dobs in Å, (hkl), Ivis) are: 5.45, (110), 25; 2.772, (211), 100; 2.324, (002), 30; 2.254, (301), 20. Luster is adamantine translucent, streak is brownish red; crystals are uniaxial (+) with ω - 2.3, ε - 2.5 at 589 nm. Pleochroism is intense with ε = red orange intense, ω = orange brown. The crystal structure was solved from data collected using synchrotron radiation by traditional direct methods and refined using 350 observed unique reflections to R(F) = 0.037, Rw(F2) = 0.075. The structure of tillmannsite containes isolated tetrahedra (V,As)O4 and tetrahedral clusters (Ag3Hg) formed by metallic atoms. Each (Ag,Hg) metallic atom is coordinated by 3 metallic neighbors and by 3 oxygens. | |
dc.subject | tillmannsite | |
dc.subject | crystal structure | |
dc.subject | vanadate | |
dc.subject | silver | |
dc.subject | mercury | |
dc.subject | roua france | |
dc.title | TILLMANNSITE, (AG3HG)(V,AS)O4, A NEW MINERAL: ITS DESCRIPTION AND CRYSTAL STRUCTURE | |
dc.type | Статья |
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