Parakeldyshite

General Information:
 Chemical Formula:
Na2ZrSi2O7
 Composition:
(Molecular Weight = 305.37 gm)
Sodium 15.06 % Na
Zirconium 29.87 % Zr
Silicon 18.39 % Si
Oxygen 36.68 % O 
 Empirical Formula:
Na2ZrSi2O7
 IMA Status:
Approved IMA 1975
Physical Properties:
 Color:
bluish white or white.
 Density:
3.39
 Diaphaniety:
Translucent
 Hardness:
5.5-6 - Knife Blade-Orthoclase
 Luminescence:
Fluorescent.
 Luster:
Vitreous (Glassy)
 Streak:
white
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