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Uraninite

Type Locality
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic
Mineral Data
UO2
Strunz: 
4.DL.05
Physical Properties
Crystal System: 
Isometric
Hardness: 
5.0 - 6.0
Tenacity: 
brittle
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