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Cryolite

Type Locality
Ivigtut Cryolite deposit, Ivittuut (Ivigtut), Arsuk Fjord, Sermersooq, Greenland
Mineral Data
Na3[AlF6]
Strunz: 
3.CB.15
Physical Properties
Crystal System: 
Monoclinic
Streak: 
White
Hardness: 
2.5
Tenacity: 
brittle
Synonyms
Synonyms: 
Criolite
Photos