Owl - coll. P.P. ATHENA

MINERALOGY
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Mineral:JOHANNSENITE
Formula:CaMnSi2O6
Crystal System:Monoclinic
Strunz Nr:8/F.01-70
Group:Pyroxene Group
References:DAN Earth Sci. 312 (1990), 213; HB2/1 (1995)
Type Locality:Bohemia mining distr., Lane Co., Oregon, USA

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