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Natrochalcite

Type Locality
Chuquicamata Mine, Chuquicamata District, Calama, El Loa Province, Antofagasta Region, Chile
Mineral Data
NaCu2(SO4)2(OH)·2H2O
Strunz: 
7.DF.15
Physical Properties
Crystal System: 
Monoclinic
Hardness: 
4.5