Jonesite

General Information:
 Chemical Formula:
Ba4(K,Na)2Ti4Al2Si10O36·6(H2O)
 Composition:
(Molecular Weight = 1,829.86 gm)
Potassium 3.21 % K 
Barium 30.02 % Ba
Sodium 0.63 % Na
Titanium 10.47 % Ti
Aluminum 2.95 % Al
Silicon 15.35 % Si
Hydrogen 0.66 % H 
Oxygen 36.72 % O 
 Empirical Formula:
Ba4K1.5Na0.5Ti4Al2Si10O36·6(H2O)
 IMA Status:
Approved IMA 1977
Physical Properties:
 Color:
colorless.
 Density:
3.25
 Diaphaniety:
Transparent
 Hardness:
3-4 - Calcite-Fluorite
 Luminescence:
Fluorescent.
 Luster:
Vitreous (Glassy)
 Streak:
white
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