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Barbosalite: Fe++Fe+++2(PO4)2(OH)2
Comments: Black, cruciform quadrilling twins of barbosalite crystals. Location: Sapucaia, Mina Gerais, Brazil. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals
Barbosalite: Fe++Fe+++2(PO4)2(OH)2 Phosphosiderite: Fe+++PO4·2(H2O)
Comments: Transparent, brown crystal of phosphosiderite on black barbosalite. Location: Bull Moose mine, Custer, Custer County, South Dakota, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals