Batisite

General Information:
 Chemical Formula:
(Ba,K,Na)3Ti2Si4O14
 Composition:
(Molecular Weight = 624.94 gm)
Potassium 3.75 % K 
Barium 26.37 % Ba
Sodium 0.74 % Na
Titanium 15.32 % Ti
Silicon 17.98 % Si
Oxygen 35.84 % O 
 Empirical Formula:
Ba1.2K0.6Na0.2Ti2Si4O14
 IMA Status:
Approved IMA 1959
Physical Properties:
 Cleavage:
[100] Good
 Color:
brown pink, yellow brown, or dark brown.
 Density:
3.432
 Diaphaniety:
Translucent to Opaque
 Hardness:
5.9
 Luster:
Vitreous - Greasy
 Streak:
pink white
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