Owl - coll. P.P. ATHENA

MINERALOGY
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Mineral:EFREMOVITE
Formula:(NH4)2Mg2(SO4)3
Crystal System:Cubic
Strunz Nr:6/A.03-30
Group:Langbeinite Group
References:ZVMO 118/3 (1989), 84; HB5 (2003)
Type Locality:Chelyabinsk coal Basin, Ural Mts, Russia

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