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ATHENA

MINERALOGY

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Mineral: JAHNSITE-(CaMnFe)
Formula: CaMn2+Fe2+2Fe3+2(PO4)4(OH)2(H2O)8
Crystal System: Monoclinic
Group: Jahnsite group. Jahnsite subgroup
IMA Number: 1978 s.p.
References: MM 42 (1978), 309; HB4 (2000)
Type Locality: Tip Top pegmatite, Custer, Custer Co., South Dakota, USA

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