General Information:
Chemical Formula:
Be2SiO4
Composition:
(Molecular Weight = 110.11 gm)
Beryllium 16.37 % Be
Silicon 25.51 % Si
Oxygen 58.12 % O
Empirical Formula:
Be2(SiO4)
Environment:
Alpine fissures, pegmatites, and hydrothermally altered rocks.
Locality:
Habachtal, Austria.
Name Origin:
From the Greek phenakos - "liar."
Physical Properties:
Cleavage:
[1120] Distinct
Color:
colorless, wine yellow, yellow, pink, or pinkish red.
Density:
2.97 - 3, Average = 2.98
Diaphaniety:
Transparent to subtranslucent
Habits:
Massive - Fibrous - Distinctly fibrous fine-grained forms., Granular - Generally occurs as anhedral to subhedral crystals in matrix.,
Hardness:
7.5-8
Luminescence:
Non-fluorescent.
Luster:
Vitreous (Glassy)
Streak:
white
More details...