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Hübnerite



 

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Hübnerite or hubnerite is a mineral consisting of manganese tungstate (chemical formula: MnWO4). It is the manganese endmember of the manganese - iron wolframite solid solution series. It forms reddish brown to black monoclinic prismatic submetallic crystals. The crystals are typically flattened and occur with fine striations. It has a high specific gravity of 7.15 and a Mohs hardness of 4.5. It is transparent to translucent with perfect cleavage. Refractive index values are nα=2.170 - 2.200, nβ=2.220, and nγ=2.300 - 2.320.

Typical occurrence is in association with high-temperature hydrothermal vein deposits and altered granites with greisen, granite pegmatites and in alluvial deposits.

It was first described in 1865 and named after the German mineralogist, Adolf Huebner.

See also

References

  • mineral galleries
  • webmineral.com
  • Mindat data
 
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Hübnerite". A list of authors is available in Wikipedia.
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