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ATHENA

MINERALOGY

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Mineral:PROTOANTHOPHYLLITE
Formula:(Mg,Fe2+)2Mg5Si8O22(OH)2 · H2O
Crystal System:Orthorhombic
Strunz Nr:8/F.12-140
Group:Amphibole group group I: Mg, Fe, Mn, Li
References:AM 87 (2002), 1096; AM 88 (2003), 1718
Type Locality:Takase mine, Chugoku district, Japan

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