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Sanidine

Type Locality
Drachenfels, Königswinter, Siebengebirge, North Rhine-Westphalia, Germany
Mineral Data
KAlSi3O8
Strunz: 
9.FA.30
Physical Properties
Crystal System: 
Monoclinic - Prismatic
Streak: 
White
Hardness: 
6.0
Tenacity: 
brittle
Synonyms
Synonyms: 
Sanidino