Armenite

General Information:
 Chemical Formula:
BaCa2Al6Si9O30·2(H2O)
 Composition:
(Molecular Weight = 1,148.15 gm)
Barium 11.96 % Ba
Calcium 6.98 % Ca
Aluminum 14.10 % Al
Silicon 22.02 % Si
Hydrogen 0.35 % H 
Oxygen 44.59 % O 
 Empirical Formula:
BaCa2Al6Si9O30·2(H2O)
 Environment:
Silicate mineral found in Ba-rich hydrothermal veins or fissures.
 Locality:
Armen Mine, Kongsberg, Norway.
 Name Origin:
The name origin for Armenite is the type locality.
Physical Properties:
 Cleavage:
[010] Perfect, [110] Distinct
 Color:
colorless, gray green, or white.
 Density:
2.76
 Diaphaniety:
Translucent
 Hardness:
7.5 - Garnet
 Luster:
Vitreous (Glassy)
 Streak:
white
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