Russellite

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Russellite
Category Tungstate minerals
Chemical formula (BiO2)[WO4]
Identification
Color yellow-green, yellow
Crystal system orthorhombic
Mohs Scale hardness
Dispersion relatively strong
Density 7.33 - 7.37 g/cm3
References Mindat.org

Russellite is a mineral with the chemical formula (BiO2)[WO4].[1]

In the orthorhombic crystal system, Russellite is yellow or yellow-green in colour, with a Mohs hardness of 3½.[1]

Russellite is named for the mineralogist Sir Arthur Russell, and the type locality is the Castle-an-Dinas Mine,[1] near St Columb Major in Cornwall, where it was found in wolframite.[2]

[edit] References

  1. ^ a b c Russellite: Russellite mineral information and data
  2. ^ Embrey, P. G.; Symes, R. F. (1987). "The Mines and Mining", Minerals of Cornwall and Devon. London: British Museum (Natural History), p.54. ISBN 0565009893.