Classification of Otjisumeite |
| IMA status: | Approved |
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| Strunz 8th edition ID: | 4/C.08-70
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| Nickel-Strunz 10th (pending) edition ID: | 9.JA.15
9 : SILICATES (Germanates) J : Germanates A : |
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| Dana 8th edition ID: | 7.10.3.1
7 : MULTIPLE OXIDES 10 : AB4X9 |
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| Hey's CIM Ref.: | 7.11.18
7 : Oxides and Hydroxides 11 : Oxides of Sn and Pb |
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| mindat.org URL: | http://www.mindat.org/min-3041.html Please feel free to link to this page. |
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Type Occurrence of Otjisumeite |
| Type Locality: | Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia |
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| Year of Discovery: | 1981 |
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Physical Properties of Otjisumeite |
| Hardness (Mohs): | 3 |
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Crystallography of Otjisumeite |
| Crystal System: | Triclinic |
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| Cell Parameters: | a = 6.94Å, b = 6.58Å, c = 9.27Å α = 102.94°, β = 103.05°, γ = 114.77° |
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| Ratio: | a:b:c = 1.055 : 1 : 1.409 |
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| Unit Cell Volume: | V 349.32 ų (Calculated from Unit Cell) |
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Optical Data of Otjisumeite |
| Type: | Biaxial (+) |
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| RI values: | nα = 1.920 nβ = 1.922 nγ = 1.943 |
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| 2V: | Measured: 20° , Calculated: 36° |
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| Maximum Birefringence: | δ = 0.023
 Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration. |
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| Surface Relief: | Very High |
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| Dispersion: | none |
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Chemical Properties of Otjisumeite |
| Formula: | |
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| Essential elements: | Ge, O, Pb |
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| All elements listed in formula: | Ge, O, Pb |
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Relationship of Otjisumeite to other Species |
| Related Minerals - Nickel-Strunz Grouping): | |
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| Related Minerals - Hey's Index Grouping: | |
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Other Names for Otjisumeite |
| Synonyms: | |
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| German names: | |
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| Spanish names: | |
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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 Otjisumeite |
| Reference List: | American Mineralogist (1987): 72: 1026-1027.
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Internet Links for Otjisumeite |
| Search Engines: |
Look for Otjisumeite on Google
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| External Links: | Look for Otjisumeite on WebmineralLook for Otjisumeite on Athena MineralogyLook for Otjisumeite on WikipediaLook for Otjisumeite on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure DatabaseSearch for Otjisumeite in the Natural History Museum (London) online catalogueOtjisumeite details from Handbook of Mineralogy (PDF) |
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| Mineral Dealers: | Search for Otjisumeite at Thames Valley MineralsFabre Minerals - search for Otjisumeite specimense-Rocks - Mineral Auctions and SalesWright's Rock Shop - excellent mineral specimens since 1970Search for Otjisumeite on minvision.comBuy Fine Minerals from mineralsweb.comBuy fine minerals and gemstones from Pala InternationalFind Otjisumeite on www.crystalclassics.co.ukLapis Mineral MagazinTop quality minerals from Kristalle of CaliforniaThe Arkenstone - Fine MineralsRare and Unusual minerals at Mineralogical Research Company |
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| Jobs: | Mining & Geology Jobs |
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Localities for Otjisumeite |
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