Davanite

General Information:
 Chemical Formula:
K2TiSi6O15
 Composition:
(Molecular Weight = 534.58 gm)
Potassium 14.63 % K 
Titanium 8.96 % Ti
Silicon 31.52 % Si
Oxygen 44.89 % O 
 Empirical Formula:
K2TiSi6O15
 IMA Status:
Approved IMA 1983
Physical Properties:
 Cleavage:
None
 Color:
colorless.
 Density:
2.76
 Diaphaniety:
Transparent
 Hardness:
5 - Apatite
 Luster:
Vitreous (Glassy)
 Streak:
white
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