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ATHENA

MINERALOGY

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Mineral: PERLOFFITE
Formula: Ba(Mn,Fe2+)2Fe3+2(PO4)3(OH)3
Crystal System: Monoclinic
Group: Bjarebyite group
IMA Number: 1976-002
References: MR 8 (1977), 112; HB4 (2000)
Type Locality: Big Chief mine, Glendale, Pennington Co., South Dakota, USA

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