General Information:
Chemical Formula:
K3Na3Ca5(Si12O30)[F,(OH)]4·(H2O)
Composition:
(Molecular Weight = 1,295.68 gm)
Potassium 9.05 % K
Sodium 5.32 % Na
Calcium 15.47 % Ca
Silicon 26.01 % Si
Hydrogen 0.23 % H
Oxygen 39.51 % O
Fluorine 4.40 % F
Empirical Formula:
K3Na3Ca5Si12O30F3(OH)·(H2O)
IMA Status:
Approved IMA
Locality:
Charoite, Murun, East Siberia.
Physical Properties:
Cleavage:
[010] Good, [100] Good
Color:
greenish blue, bluish gray, greenish gray, or lilac gray.
Density:
2.68
Diaphaniety:
Transparent to Translucent
Hardness:
5.5 - Knife Blade
Luster:
Vitreous (Glassy)
Streak:
pale blue
More details...