General Information:
Chemical Formula:
KAl2(Si3B)O10(OH,F)2
Composition:
(Molecular Weight = 383.13 gm)
Potassium 10.20 % K
Aluminum 14.08 % Al
Silicon 21.99 % Si
Boron 2.82 % B
Hydrogen 0.39 % H
Oxygen 48.02 % O
Fluorine 2.48 % F
Empirical Formula:
KAl2Si3BO10(OH)1.5F0.5
IMA Status:
Approved IMA 1989
Physical Properties:
Cleavage:
[001] Perfect
Color:
white or beige white.
Density:
2.81
Diaphaniety:
Opaque
Habits:
Crystalline - Fine - Occurs as well-formed fine sized crystals., Massive - Fibrous - Distinctly fibrous fine-grained forms.,
Hardness:
2.5-3 - Finger Nail-Calcite
Luster:
Vitreous - Dull
Streak:
white
More details...