Natrosilite

General Information:
 Chemical Formula:
Na2Si2O5
 Composition:
(Molecular Weight = 182.15 gm)
Sodium 25.24 % Na
Silicon 30.84 % Si
Oxygen 43.92 % O 
 Empirical Formula:
Na2Si2O5
 IMA Status:
Approved IMA 1975
Physical Properties:
 Cleavage:
[100] Perfect, [001] Distinct, [011] Indistinct
 Color:
colorless or white.
 Density:
2.48
 Diaphaniety:
Transparent
 Streak:
white
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