Classification of IMA2007-034 |
| IMA status: | Approved 2007 |
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| mindat.org URL: | http://www.mindat.org/min-35898.html
Please feel free to link to this page. |
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Type Occurrence of IMA2007-034 |
| Type Locality: | Luobusa Cr deposit, Qusum (Qusong) Co., Shannan Prefecture, Tibet Autonomous Region, China |
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| Year of Discovery: | 1986 |
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| Geological Setting of type material: | Chromite deposit, hosted in mafic-ultramafic rocks. |
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Occurrences of IMA2007-034 |
| Geological Setting: | In kimberlite; in a PGE-bearing Cu-Ni sulphide deposit hosted by mafic-ultramafic rocks. |
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Physical Properties of IMA2007-034 |
| Diaphaneity (Transparency): | Opaque |
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| Colour: | Black, steel grey |
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| Fracture: | Conchoidal |
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Crystallography of IMA2007-034 |
| Crystal System: | Hexagonal |
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| Class (H-M): | 6 m2 - Ditrigonal Dipyramidal |
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| Space Group: | P6m2 |
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| Cell Parameters: | a = 2.902Å, c = 2.831Å
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| Ratio: | a:c = 1 : 0.976 |
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| Unit Cell Volume: | V 20.65 ų (Calculated from Unit Cell) |
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| Z: | 1 |
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Optical Data of IMA2007-034 |
| Type: | Anisotropic |
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| Anisotropism: | Isotropic to weakly anisotropic |
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| Bireflectance: | No bireflectance observed |
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| Reflectivity: | | 400nm | R=66.46% | | 420nm | R=64.42% | | 440nm | R=55.13% | | 480nm | R=53.14% | | 500nm | R=50.73% | | 520nm | R=48.56% | | 540nm | R=46.66% | | 546nm | R=46.09% | | 560nm | R=45.39% | | 580nm | R=45.02% | | 589nm | R=44.94% | | 600nm | R=44.5l% | | 620nm | R=43.88% | | 640nm | R=43.32% | | 660nm | R=41.64% | | 680nm | R=40.75% | | 700nm | R=40.60% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 66.46%. |
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| Colour in reflected light: | White to yellowish white |
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| Internal Reflections: | None |
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Chemical Properties of IMA2007-034 |
| Formula: | |
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| All elements listed in formula: | C, W |
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| Analyical Data: | Results from electron microprobe analyses of material from Sichuan (1, mean out of 3 analyses) and Shandong (2, range of results of 10 analyses); presence of carbon and absence of other elements with mass fractions above 1 wt.-% confirmed by Auger spectroscopy.
(1) (2)
W (91.13) (88.05-89.58) |
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Other Information |
| Health Warning: | No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care. |
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References for IMA2007-034 |
| Reference List: | Strukturberichte (1926), 575.
Acta Crystallographica (1961) 14, 200.
Jianhong Zhang, Guojie Yang, and Zhaohui Li (1986): Discovery of natural tungsten carbide (WC) in China. Kuangwu Xuebao 6, 344-349 (in Chinese with English abstract). - American Mineralogist (1989) 74, 948 (abstract).
Doklady Akademy Nauk SSSR (1997) 352, 226-229.
American Mineralogist (1999) 84, 1468. |
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Articles/Blogs about IMA2007-034 |
Internet Links for IMA2007-034 |
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| External Links: | Look for IMA2007-034 on WebmineralLook for IMA2007-034 on Athena MineralogyLook for IMA2007-034 on WikipediaLook for IMA2007-034 on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure DatabaseSearch for IMA2007-034 in the Natural History Museum (London) online catalogue |
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Localities for IMA2007-034 |
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