Hübnerite: Difference between revisions
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[[Image:Hubnerite.jpg|thumb|right|300px|Hubnerite from Cerro de Pasco, Peru]] | [[Image:Hubnerite.jpg|thumb|right|300px|Hubnerite from Cerro de Pasco, Peru]] | ||
'''Hübnerite''' or '''hubnerite''' is a | '''Hübnerite''' or '''hubnerite''' is a mineral consisting of manganese tungstate (chemical formula: MnWO<sub>4</sub>). 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 na=2.170 - 2.200, nß=2.220, and n?=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== | ==See also== | ||
*[[List of minerals]] | *[[Wikipedia:List of minerals]] | ||
*[[List of minerals named after people]] | *[[Wikipedia:List of minerals named after people]] | ||
==References== | ==References== | ||
Revision as of 03:39, 30 March 2009
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 na=2.170 - 2.200, nß=2.220, and n?=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.