Owl - coll. P.P. ATHENA

MINERALOGY
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Mineral:GRIPHITE
Formula:Na4Ca6(Mn,Fe2+,Mg)19Li2Al8(PO4)24(F,OH)8
Crystal System:Cubic
Strunz Nr:7/B.02-10
References:BM 101 (1978), 536; AM 64 (1979), 1333; HB4 (2000)
Type Locality:Everly mine, Harney City, Pennington Co., South Dakota, USA

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