Owl - coll. P.P. ATHENA

MINERALOGY
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Mineral:PERMANGANOGRUNERITE (?)
Formula:[]Mn4Fe2+3Si8O22(OH)2 (?)
Crystal System:Monoclinic
Strunz Nr:8/F.07-55
Group:Amphibole Group Group I: Mg, Fe, Mn, Li
References:CM 35 (1997), 219
Comments:[] = vacancy

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