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ATHENA

MINERALOGY

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Mineral: ORLYMANITE
Formula: Ca4Mn2+3Si8O20(OH)6.2H2O
Crystal System: Rhombohedral (Trigonal)
IMA Number: 1988-029
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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