Owl - coll. P.P. ATHENA

MINERALOGY
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Mineral:POLDERVAARTITE
Formula:Ca(Ca0.5Mn2+0.5)(SiO3OH)(OH)
Crystal System:Orthorhombic
Strunz Nr:8/B.22-25
References:AM 78 (1993), 1082; HB2/2 (1995); NM 90-94 (1997); MR 5 (2008), 373
Type Locality:Wessels mine, Kalahari Mn field, Kuruman Hill, Cape Province, South Africa

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