Calciotalc

General Information:
 Chemical Formula:
CaMg2Si4O10(OH)2
 Composition:
(Molecular Weight = 395.04 gm)
Calcium 10.15 % Ca
Magnesium 12.31 % Mg
Silicon 28.44 % Si
Hydrogen 0.51 % H 
Oxygen 48.60 % O 
 Empirical Formula:
CaMg2Si4O10(OH)2
 IMA Status:
Approved IMA 1959
Physical Properties:
 Color:
gray.
 Hardness:
2-3 - Gypsum-Calcite
 Luster:
Silky - Pearly
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