General Information:
Chemical Formula:
Ca3Al2(SiO4)3-x(OH)4x(x=0.2-1.5)
Composition:
(Molecular Weight = 426.39 gm)
Calcium 28.20 % Ca
Aluminum 12.66 % Al
Silicon 13.17 % Si
Hydrogen 0.95 % H
Oxygen 45.03 % O
Empirical Formula:
Ca3Al2(SiO4)2(OH)4
Environment:
Contact metamorphic and altered igneous rocks.
IMA Status:
Approved IMA 1983
Locality:
Marienberg, near Aussig, Bohemia of Czechoslovakia.
Physical Properties:
Cleavage:
None
Color:
colorless, white, pale gray, brown, or pink.
Density:
3.13
Diaphaniety:
Transparent to translucent
Habits:
Crystalline - Fine - Occurs as well-formed fine sized crystals., ,
Hardness:
6.5 - Pyrite
Luminescence:
Fluorescent.
Luster:
Vitreous (Glassy)
Streak:
white
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