Rankinite

General Information:
 Chemical Formula:
Ca3Si2O7
 Composition:
(Molecular Weight = 288.40 gm)
Calcium 41.69 % Ca
Silicon 19.48 % Si
Oxygen 38.83 % O 
 Empirical Formula:
Ca3Si2O7
Physical Properties:
 Cleavage:
None
 Color:
colorless or white.
 Density:
2.96 - 3, Average = 2.98
 Diaphaniety:
Transparent
 Hardness:
5.5 - Knife Blade
 Luster:
Vitreous (Glassy)
 Streak:
white
More details...

B: (Kimia) rankinit
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