Classification of Turtmannite |
| IMA status: | Approved 2000 |
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| Nickel-Strunz 10th (pending) edition ID: | 8.BE.45
8 : PHOSPHATES, ARSENATES, VANADATES B : Phosphates, etc., with additional anions, without H2O E : With only medium-sized cations, (OH, etc.):RO4 > 2:1 |
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| mindat.org URL: | http://www.mindat.org/min-11090.html Please feel free to link to this page. |
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Type Occurrence of Turtmannite |
| Type Locality: | Pipji glacier, Turtmann Valley, Wallis (Valais), Switzerland |
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Physical Properties of Turtmannite |
| Lustre: | Vitreous |
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| Colour: | Light yellow |
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| Streak: | White |
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Crystallography of Turtmannite |
| Crystal System: | Trigonal |
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Optical Data of Turtmannite |
| Type: | Uniaxial (-) |
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| RI values: | nε = 1.787 |
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| Maximum Birefringence: | δ = 0.000
 Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration. |
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| Surface Relief: | Moderate |
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Chemical Properties of Turtmannite |
| Formula: | | (Mn,Mg) | | Mg | | [(V,As)O | | ] | | [SiO | | ] | | [AsO | | ] | | O | | (OH) | | |
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| Essential elements: | As, H, Mg, Mn, O, Si, V |
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| All elements listed in formula: | As, H, Mg, Mn, O, Si, V |
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Relationship of Turtmannite to other Species |
Related Minerals - Nickel-Strunz Grouping):
- + | |
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Other Names for Turtmannite |
| Synonyms: | |
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| Other Languages: | |
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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 Turtmannite |
| Reference List: | Brugger, J., Armbruster, T., Meisser, N., Hejny, C. & Grobety, B. (2001): Description and crystal structure of turtmannite, a new mineral with a 68 Å period related to mcgovernite. American Mineralogist: 86: 1494-1505.
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Internet Links for Turtmannite |
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| External Links: | Look for Turtmannite on WebmineralLook for Turtmannite on Athena MineralogyLook for Turtmannite on WikipediaLook for Turtmannite on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure DatabaseSearch for Turtmannite in the Natural History Museum (London) online catalogue |
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Localities for Turtmannite |