General Information:
Chemical Formula:
NaCa2Mg5Si7AlO22(OH)2
Composition:
(Molecular Weight = 834.25 gm)
Sodium 2.76 % Na
Calcium 9.61 % Ca
Magnesium 14.57 % Mg
Aluminum 3.23 % Al
Silicon 23.57 % Si
Hydrogen 0.24 % H
Oxygen 46.03 % O
Empirical Formula:
NaCa2Mg5Si7AlO22(OH)2
IMA Status:
Approved IMA 1978
Physical Properties:
Cleavage:
[110] Perfect, [010] Distinct
Color:
bluish green, colorless, gray, white, or light green.
Density:
3 - 3.059, Average = 3.02
Diaphaniety:
Transparent to translucent
Habits:
Tabular - Form dimensions are thin in one direction., ,
Hardness:
6 - Orthoclase
Luminescence:
Fluorescent.
Luster:
Vitreous (Glassy)
Streak:
white
More details...