Owl - coll. P.P. ATHENA

MINERALOGY
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Mineral:PERHAMITE
Formula:(Ca,Sr)3Al7.7Si3P4O23.5(OH)14.1 · 8H2O
Crystal System:Rhomboedral (Trigonal) pseudo Hexagonal
Strunz Nr:8/J.20-10
References:MM 41 (1977), 437; HB2/2 (1995); MM 70 (2006), 201; AM 91 (2006), 1949
Type Locality:Bell Pit, Newry, Oxford Co., Maine, USA

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