Owl - coll. P.P. ATHENA

MINERALOGY
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Mineral:BEIDELLITE
Formula:(Na,Ca0.5)0.3Al2(Si,Al)4O10(OH)2 · nH2O
Crystal System:Monoclinic
Strunz Nr:8/H.19-30
Group:Smectite Group
References:AM 47 (1962), 137; HB2/1 (1995)
Type Locality:Beidell, Saguache Co., Colorado, USA

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