Owl - coll. P.P. ATHENA

MINERALOGY
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Mineral:MARGARITE
Formula:CaAl2[]Al2Si2O10(OH)2
Crystal System:Monoclinic
Strunz Nr:8/H.12-40
Group:Mica Group Brittle micas. Dioctahedral
References:AM 63 (1978), 186; HB2/2 (1995); CM 36 (1998), 905
Type Locality:Mt Greiner, Sterzing, Tyrol, Austria
Comments:Dioctahedral brittle mica. [] = vacancy

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