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ATHENA

MINERALOGY

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Mineral:JANGGUNITE
Formula:Mn4+5-x(Mn2+,Fe3+)1+xO8(OH)6 (x=0.2)
Crystal System:Orthorhombic
Strunz Nr:4/D.13-10
References:MM 41 (1977), 519; HB3 (1997)
Type Locality:Janggun mine, Bonghwa, Korea

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