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ATHENA

MINERALOGY

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Mineral: MANJIROITE
Formula: (Na,K)(Mn4+,Mn2+)8O16.nH2O
Crystal System: Quadradic (Tetragonal)
Group: Hollandite supergroup. Coronadite group
IMA Number: 1966-009
References: AM 53 (1968), 2103; HB3 (1997); AM 107 (2022), 564
Type Locality: Kohare mine, Iwate, Japan

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