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 mineral consisting of [[manganese]] [[tungstate]] (chemical formula: MnWO<sub>4</sub>). It is the manganese endmember of the manganese - iron [[wolframite]] [[solid solution]] series. | '''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 nα=2.170 - 2.200, nβ=2.220, and nγ=2.300 - 2.320. | 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 [[granite]]s with [[greisen]], granite [[pegmatite]]s and in alluvial deposits. | Typical occurrence is in association with high-temperature [[hydrothermal]] vein deposits and altered [[granite]]s with [[greisen]], [[granite]] [[pegmatite]]s and in [[alluvial]] deposits. | ||
It was first described in 1865 and named after the German | It was first described in 1865 and named after the German [[mineralogist]], [[Adolf Huebner]]. | ||
==See also== | ==See also== | ||
Revision as of 03:05, 7 September 2007
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
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