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Hübnerite or hubnerite is a mineral consisting of manganese tungsten oxide (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…
Overview, Geological occurrence & Structure
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wolframite minerals crystals mineral family manganese cleavage reddish brown structure occurrence crystal color specific gravity perfect monoclinic tungsten prismatic formula
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Hübnerite | 2V angle | 73° measured | 1.00 | infobox |
| Hübnerite | Birefringence | 0.1200–0.1300 | 1.00 | infobox |
| Hübnerite | Category | Oxide minerals | 1.00 | infobox |
| Hübnerite | Cleavage | Perfect on {010} | 1.00 | infobox |
| Hübnerite | Color | Yellowish brown to reddish brown, blackish brown, black; Deep red internal reflections in reflected light | 1.00 | infobox |
| Hübnerite | Crystal class | Prismatic (2/m) (same H-M symbol) | 1.00 | infobox |
| Hübnerite | Crystal habit | Prismatic striated crystals, tabular to flattened, in radiating groups | 1.00 | infobox |
| Hübnerite | Crystal system | Monoclinic | 1.00 | infobox |
| Hübnerite | Diaphaneity | Transparent to translucent | 1.00 | infobox |
| Hübnerite | Formula | .mw-parser-output .template-chem2-su{display:inline-block;font-size:80%;line-height:1;vertical-align:-0.35em}.mw-parser-output .template-chem2-su>span{display:block;text-align:l… | 1.00 | infobox |
| Hübnerite | Fracture | Irregular/uneven | 1.00 | infobox |
| Hübnerite | IMA symbol | Hbr | 1.00 | infobox |
| Hübnerite | Luster | Metallic to adamantine towards resinous. | 1.00 | infobox |
| Hübnerite | Mohs scale hardness | 4–.mw-parser-output .frac{white-space:nowrap}.mw-parser-output .frac .num,.mw-parser-output .frac .den{font-size:80%;line-height:0;vertical-align:super}.mw-parser-output .frac .… | 1.00 | infobox |
| Hübnerite | Optical properties | Biaxial (+) | 1.00 | infobox |
| Hübnerite | Pleochroism | Perceptible; X = yellow to green, red-orange; Y = yellowish brown to greenish yellow, red-orange to red; Z = green; brick-red to red | 1.00 | infobox |
| Hübnerite | Refractive index | nα=2.17–2.2, nβ=2.22, nγ=2.3–2.32 | 1.00 | infobox |
| Hübnerite | Space group | P21/c | 1.00 | infobox |
| Hübnerite | Specific gravity | 7.12–7.18 | 1.00 | infobox |
| Hübnerite | Streak | Yellow to reddish brown, greenish gray | 1.00 | infobox |
| Hübnerite | Strunz classification | 4.DB.30 | 1.00 | infobox |
| Hübnerite | Tenacity | Brittle | 1.00 | infobox |
| Hübnerite | Twinning | Contact twins | 1.00 | infobox |
| Hübnerite | Unit cell | a = 4.86, b = 5.78 c = 5.02 [Å]; β = 90.816°, Z = 4 | 1.00 | infobox |
| Hübnerite | is a | synonym of the original name | 0.90 | text |
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