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Walpurgite

Type Locality
Walpurgis Flacher vein, Weißer Hirsch Mine (Shaft 3), Neustädtel, Schneeberg District, Erzgebirge, Saxony, Germany
Mineral Data
(BiO)4(UO2)(AsO4)2·3H2O
Strunz: 
8.EA.05
Physical Properties
Hardness: 
3.5