 | Pieczka, Adam, Cooper, Mark A., Hawthorne, Frank C. (2019) Lepageite, Mn32+(Fe73+Fe42+)O3[Sb53+As83+O34], a new arsenite-antimonite mineral from the Szklary pegmatite, Lower Silesia, Poland. American Mineralogist, 104 (7) 1043-1050 doi:10.2138/am-2019-6903 | Journal (article/letter/editorial) | | the formulas of dumortierite-supergroup end-members do not reflect common presence of Sb+As in compositions...could correspond to weakly bonded ligands but they do not contribute significantly to the incident bond-valence...and As(9), and are all isolated groups in that they do not link to each other or to the polyhedra of the...± Mn, only karibibite and schneiderhöhnite have been discovered in pegmatites: karibibite, Fe33+(As3+O2)4(As23+O5)(OH)..., first at Tuften, Norway (Larsen 2013), and karibibite + schneiderhöhnite, 3+ Fe2+Fe3+ 3 As5 O13, in |
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Boca Rica claim, Sapucaia do Norte, Galiléia, Minas Gerais, Brazil