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ATHENA

MINERALOGY

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Mineral: JAHNSITE-(CaMnMg)
Formula: CaMn2+(Mg,Fe2+)2Fe3+2(PO4)4(OH)2.8H2O
Crystal System: Monoclinic
Group: Jahnsite group. Jahnsite subgroup
IMA Number: 1973-022
References: MM 42 (1978), 309; HB4 (2000)
Type Locality: Tip Top pegmatite, Custer, Custer Co., South Dakota, USA

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