General Information:
Chemical Formula:
NaCaAlF6·(H2O)
Composition:
(Molecular Weight = 222.06 gm)
Sodium 10.35 % Na
Calcium 18.05 % Ca
Aluminum 12.15 % Al
Hydrogen 0.91 % H
Oxygen 7.21 % O
Fluorine 51.33 % F
Empirical Formula:
NaCaAlF6·(H2O)
Environment:
Alteration product of cryolite.
Locality:
Greenland, Ural Mountains, Russia.
Physical Properties:
Cleavage:
[001] Perfect, [110] Imperfect
Color:
colorless, white, reddish, or brownish.
Density:
2.98
Diaphaniety:
Transparent
Habits:
Pseudo Cubic - Crystals show a cubic outline., Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).,
Hardness:
2 - Gypsum
Luminescence:
Non-fluorescent.
Luster:
Vitreous - Greasy
Streak:
white
More details...