Pabstite

General Information:
 Chemical Formula:
Ba(Sn,Ti)Si3O9
 Composition:
(Molecular Weight = 466.58 gm)
Barium 29.43 % Ba
Titanium 2.57 % Ti
Silicon 18.06 % Si
Tin 19.08 % Sn
Oxygen 30.86 % O 
 Empirical Formula:
BaSn0.75Ti0.25Si3O9
 IMA Status:
Approved IMA 1965
 Locality:
Kalkar quarry, north of Santa Cruz, Santa Cruz Co., California.
Physical Properties:
 Color:
colorless or white.
 Density:
4.03
 Diaphaniety:
Transparent to Translucent
 Hardness:
6 - Orthoclase
 Luminescence:
Fluorescent.
 Luster:
Vitreous (Glassy)
 Streak:
white
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