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Lermontovite

Type Locality
Gremuchka ore zone, mine №1, Beshtau Mt., Lermontovskoe U Deposit, Pyatigorsk, Stavropol'skiy Kray, Northern Caucasus Region, Russia
Mineral Data
U(PO4)(OH)·H2O
Strunz: 
8.DN.15
Physical Properties
Hardness: 
0.0
Tenacity: 
very brittle