Owl - coll. P.P. 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
Strunz Nr:8/H.17-60
Group:Ganophyllite Group
References:MM 48 (1984), 93; HB2/1 (1995)
Type Locality:Big Rock Quarry, Little Rock, Pulaski Co., Arkansas, USA

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