Haradaite

General Information:
 Chemical Formula:
Sr2V+++2O2(Si4O12)
 Composition:
(Molecular Weight = 613.46 gm)
Strontium 28.57 % Sr
Vanadium 16.61 % V 
Silicon 18.31 % Si
Oxygen 36.51 % O 
 Empirical Formula:
Sr2V3+2Si4O14
 IMA Status:
Approved IMA 1974
Physical Properties:
 Cleavage:
[010] Perfect, [100] Distinct, [001] Distinct
 Color:
green, light blue, or light green.
 Density:
3.8
 Hardness:
4.5 - Between Fluorite and Apatite
 Luster:
Vitreous (Glassy)
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