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Bederite: ([ ],Na)Ca2(Mn++,Mg,Fe++)2(Fe+++,Mg++,Al)2Mn++2(PO4)6·2(H2O)
Comments: Dark brown massive bederite. Location: El Penon Pegmatite, Nevados de Palermo, Salta, Argentina. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species