Banalsite

General Information:
 Chemical Formula:
BaNa2Al4Si4O16
 Composition:
(Molecular Weight = 659.57 gm)
Barium 20.82 % Ba
Sodium 6.97 % Na
Aluminum 16.36 % Al
Silicon 17.03 % Si
Oxygen 38.81 % O 
 Empirical Formula:
BaNa2Al4Si4O16
 Environment:
Found in a vein in manganese ore. May form a series with stronalsite.
 Locality:
Benalli mine, Rhiw, Lleyn Peninsula, Caernarvonshire, Wales, UK.
 Name Origin:
Named from a contraction of the component cation symbols: Ba, Na,Al, and Si.
Physical Properties:
 Cleavage:
[110] Good, [001] Good
 Color:
white.
 Density:
3.065
 Diaphaniety:
Translucent to transparent
 Hardness:
6 - Orthoclase
 Luster:
Vitreous - Pearly
 Streak:
white
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