General Information:
Chemical Formula:
Na3(SO4)F
Composition:
(Molecular Weight = 184.03 gm)
Sodium 37.48 % Na
Sulfur 17.42 % S
Oxygen 34.78 % O
Fluorine 10.32 % F
Empirical Formula:
Na3(SO4)F
Environment:
Sublimate from steam issuing from the spring. Also in nepheline syenite pegmatites in Russia.
IMA Status:
Approved IMA 1973
Locality:
Hortense Hot Springs, Chalk Creek, Chaffee County, Colorado, USA.
Name Origin:
Named for Lia Nikolaevna Kofarko (1936-), Russian geochemist, who first noticed the mineral in Russia.
Physical Properties:
Color:
colorless, white, or light blue.
Density:
2.676 - 2.679, Average = 2.67
Habits:
Pseudo Hexagonal - Crystals show a hexagonal outline., Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite)., Encrustations - Forms crust-like aggre gates on matrix.
Hardness:
3.5 - Copper Penny
Luminescence:
Fluorescent.
Luster:
Vitreous (Glassy)
Streak:
white
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