Makatite

General Information:
 Chemical Formula:
Na2Si4O8(OH)2·4(H2O)
 Composition:
(Molecular Weight = 392.39 gm)
Sodium 11.72 % Na
Silicon 28.63 % Si
Hydrogen 2.57 % H 
Oxygen 57.08 % O 
 Empirical Formula:
Na2Si4O8(OH)2·4(H2O)
 IMA Status:
Approved IMA 1970
Physical Properties:
 Color:
colorless or white.
 Density:
2.072
 Streak:
white
More details...