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Köttigite

Type Locality
Daniel Mine (St. Daniel Mine), Neustädtel, Schneeberg District, Erzgebirge, Saxony, Germany
Mineral Data
Zn3(AsO4)2·8H2O
Strunz: 
8.CE.40
Physical Properties
Crystal System: 
Monoclinic Prismatic crystals or crusts
Hardness: 
2.5 - 3.0
Tenacity: 
flexible
Synonyms
Synonyms: 
Koettigite and Kottigite