Owl - coll. P.P. ATHENA

MINERALOGY
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Mineral:GREGORYITE
Formula:(Na2,K2,Ca)CO3
Crystal System:Hexagonal (?)
Strunz Nr:5/B.05-40
References:Lithos 13 (1980), 213; HB5 (2003)
Type Locality:Oldoinyo Lengai volcano, Tanzania

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