Minerals

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General Information

Cavansite

Cavansite got its name from its chemical composition: calcium vanadium silicate. Cavansiet contains vanadium, but is not used as an ore due to the fact its rare. It can be found as spheres with a diameter up to a few centimeters.[1]

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Chemical & Physical Information

Trivial NameCavansite
Chemical NameCalcium Vanadium Phylosilicate Tetrahydrate
Chemical FormulaCa(VO)Si4O10,4H2O
Density2,25 g·cm-3
Molar mass?
Hardness3-4
Crytal systemOrthorhombic
Unit cell?
Crystal habit?
FractureBrittle
CleavageGood [010]
ColourGreen to dark bleu
LusterGlass
StreakBleu White
OpacityTranslucent
SafetySafe
ExtraPentagonite is its polymorphous form.
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Photos

Cavansite

(6 mm)

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Sources

[1] Wikipedia

[2] Specimen from my personal collection, photo taken by me.