Formula : NaCa[AlF6] * H2O
System: monoclinic Hardness:2 Rarity:rare
Strunz id:III/C.2-20 -
HALOGENIDES
Name origin: Named after Hans Peter Jorgen Julius Thomsen (1826-1909), Professor of Chemistry, University of Copenhagen (Denmark), and founder of the Greenland cryolite industry.
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