Pachnolite

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:
Aleration product of cryolite.
 Locality:
Greenland, Ural Mountains, Russia.
Physical Properties:
 Cleavage:
[001] Poor
 Color:
colorless or white.
 Density:
2.98
 Diaphaniety:
Transparent
 Habits:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Twinning Common - Crystals are usually twinned., Pseudo Orthorhombic - Crystals show an orthorhombic shape.
 Hardness:
3 - Calcite
 Luminescence:
Non-fluorescent.
 Luster:
Vitreous - Greasy
 Streak:
white
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