General Information:
Chemical Formula:
(Na,K,Ca)2Al2Si7O18·7(H2O)
Composition:
(Molecular Weight = 694.19 gm)
Potassium 1.69 % K
Sodium 1.99 % Na
Calcium 0.58 % Ca
Aluminum 7.77 % Al
Silicon 28.32 % Si
Hydrogen 2.03 % H
Oxygen 57.62 % O
Empirical Formula:
Na0.6K0.3Ca0.1Al2Si7O18·7(H2O)
IMA Status:
Approved IMA 1974
Physical Properties:
Cleavage:
[???] Perfect
Color:
white or pink.
Density:
2.13
Diaphaniety:
Transparent to Translucent
Hardness:
3-4 - Calcite-Fluorite
Luster:
Vitreous (Glassy)
Streak:
white
More details...