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
More details...