Owl - coll. P.P. ATHENA

MINERALOGY
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Mineral:MANJIROITE
Formula:(Na,K)(Mn4+,Mn2+)8O16 · nH2O
Crystal System:Quadratic (Tetragonal)
Strunz Nr:4/D.08-10
Group:Coronadite Group
References:AM 53 (1968), 2103; HB3 (1997)
Type Locality:Kohare mine, Iwate, Japan

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