Formula : Na6[F/Cl/(SO4)2]
System: cubic Hardness:3½ Rarity:rare
Strunz id:VI/B.12-10 -
SULFATES, CHROMATES, MOLYBDATES and TUNGSTATES
Name origin: The name is derived from its composition, containing SULFur, plus Greek "hals", salt, alluding to its content of halogens.
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