General Information:
Chemical Formula:
NaBeSi3O7(OH)
Composition:
(Molecular Weight = 245.26 gm)
Sodium 9.37 % Na
Beryllium 3.67 % Be
Silicon 34.35 % Si
Hydrogen 0.41 % H
Oxygen 52.19 % O
Empirical Formula:
NaBe(Si3O7)(OH)
Environment:
Syenite rocks.
Locality:
Island Ovre-Aro, Langesundfiord, norway.
Physical Properties:
Cleavage:
[001] Good, [551] Good
Color:
blue, colorless, violet, gray, or yellow.
Density:
2.553
Diaphaniety:
Transparent to translucent
Habits:
Twinning Common - Crystals are usually twinned., Tabular - Form dimensions are thin in one direction.,
Hardness:
6 - Orthoclase
Luster:
Vitreous (Glassy)
Streak:
white
More details...