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ATHENA

MINERALOGY

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Mineral: EKMANITE = a Mn rich STILPNOMELANE
Formula: (Fe2+,Mg,Mn,Fe3+)3(Si,Al)4O10(OH)2.2H2O (?)
Crystal System: Orthorhombic
References: AM 39 (1954), 946
Type Locality: Gryhytte, Sweden

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