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ATHENA

MINERALOGY

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Mineral: EGGLETONITE
Formula: (Na,K,Ca)2(Mn,Fe)8(Si,Al)12O29(OH)7.11H2O
Crystal System: Monoclinic
Group: Ganophyllite group
IMA Number: 1982-059
References: MM 48 (1984), 93; HB2/1 (1995)
Type Locality: Big Rock Quarry, Little Rock, Pulaski Co., Arkansas, USA

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