General Information:
Chemical Formula:
Ca(VO)Si4O10·4(H2O)
Composition:
(Molecular Weight = 451.42 gm)
Calcium 8.88 % Ca
Vanadium 11.28 % V
Silicon 24.89 % Si
Hydrogen 1.79 % H
Oxygen 53.16 % O
Empirical Formula:
CaV4+Si4O11·4(H2O)
Environment:
Secondary mineralization in basalts and andesites.
IMA Status:
Approved IMA 1967
Locality:
Deccan trap basalts, Poona, India.
Name Origin:
Named after its composition of calcium, vanadium, and silicon.
Physical Properties:
Cleavage:
[010] Good
Color:
greenish blue or dark blue.
Density:
2.21 - 2.31, Average = 2.25
Diaphaniety:
Subtransparent
Hardness:
3-4 - Calcite-Fluorite
Luster:
Vitreous (Glassy)
Streak:
bluish white
More details...