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Category Tungstate minerals
(repeating unit)
Strunz classification 4.DE.15
Crystal system Orthorhombic
Crystal class Pyramidal (mm2)
H-M symbol: (mm2)
Space group Pca21
Unit cell a = 5.43 Å, b = 16.43 Å
c = 5.45 Å; Z = 4
Color Yellow-green, yellow
Crystal habit Fine-grained, compact, massive
Mohs scale hardness 3.5
Specific gravity 7.33 - 7.37
Optical properties Biaxial (+)
Refractive index 2.17 - 2.51
Dispersion relatively strong
References [1][2][3]

Russellite is a bismuth tungstate mineral with the chemical formula Bi2WO6.[1] It crystallizes in the orthorhombic crystal system. Russellite is yellow or yellow-green in color, with a Mohs hardness of ​3 12.[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 1938 in wolframite.[4] It occurs as a secondary alteration of other bismuth bearing minerals in tin - tungsten hydrothermal ore deposits, pegmatites and greisens. It typically occurs associated with native bismuth, bismuthinite, bismite, wolframite, ferberite, scheelite, ferritungstite, anthoinite, mpororoite, koechlinite, cassiterite, topaz, muscovite, tourmaline and quartz.[2]


  1. ^ a b c d Russellite: Russellite data on
  2. ^ a b Handbook of Mineralogy
  3. ^ Webmineral data
  4. ^ Embrey, P. G.; Symes, R. F. (1987). "The Mines and Mining". Minerals of Cornwall and Devon. London: British Museum (Natural History). p. 54. ISBN 0-565-00989-3.