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Tschermigite

Type Locality
Cermniky (Tschermig), Kadaň (Kaaden), Ústí Region, Bohemia (Böhmen; Boehmen), Czech Republic
Mineral Data
(NH4)Al(SO4)2·12H2O
Strunz: 
7.CC.20
Physical Properties
Hardness: 
1.5 - 2.0
Photos