Owl - coll. P.P. ATHENA

MINERALOGY
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Mineral:ORLYMANITE
Formula:Ca4Mn2+3Si8O20(OH)6 · 2H2O
Crystal System:Rhomboedral (Trigonal)
Strunz Nr:8/H.34-25
References:AM 75 (1990), 923; HB2/2 (1995); NM 90-94 (1997)
Type Locality:Wessels mine, Kalahari Mn field, Kuruman Hill, Cape Province, South Africa

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