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Haidingerite

Type Locality
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic
Mineral Data
CaHAsO4·H2O
Strunz: 
8.CJ.20
Physical Properties
Crystal System: 
Orthorhombic
Streak: 
White
Hardness: 
2.0 - 2.5
Tenacity: 
sectile