Classification of Tengchongite |
| IMA status: | Approved 1984 |
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| Strunz 8th edition ID: | 6/G.06-20
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| Nickel-Strunz 10th (pending) edition ID: | 7.HB.20
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates) H : Uranium and uranyl molybdates and wolframates B : With U6+ |
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| Dana 8th edition ID: | 49.3.1.2
49 : HYDRATED MOLYBDATES AND TUNGSTATES 3 : Hydrated Molybdates and Tungstates Containing Hydroxyl or Halogen |
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| Hey's CIM Ref.: | 27.3.12
27 : Sulphites, Chromates, Molybdates and Tungstates 3 : Molybdates |
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| mindat.org URL: | http://www.mindat.org/min-3909.html Please feel free to link to this page. |
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Type Occurrence of Tengchongite |
| Type Locality: | Unnamed U deposit, Tengchong Co., Baoshan Prefecture, Yunnan Province, China |
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| Year of Discovery: | 1986 |
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Physical Properties of Tengchongite |
| Lustre: | Vitreous |
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| Diaphaneity (Transparency): | Transparent, Translucent |
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| Colour: | Yellow |
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| Hardness (Mohs): | 2 - 2½ |
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Crystallography of Tengchongite |
| Crystal System: | Orthorhombic |
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| Cell Parameters: | a = 15.61Å, b = 13.04Å, c = 17.71Å
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| Ratio: | a:b:c = 1.197 : 1 : 1.358 |
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| Unit Cell Volume: | V 3,604.95 ų (Calculated from Unit Cell) |
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Optical Data of Tengchongite |
| Type: | Biaxial (-) |
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| RI values: | nα = 1.663 nβ = 1.760 nγ = 1.762 |
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| 2V: | Measured: 16° , Calculated: 14° |
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| Maximum Birefringence: | δ = 0.099
 Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration. |
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| Surface Relief: | High |
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| Dispersion: | weak |
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Chemical Properties of Tengchongite |
| Formula: | |
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| Essential elements: | Ca, H, Mo, O, U |
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| All elements listed in formula: | Ca, H, Mo, O, U |
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Relationship of Tengchongite 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 Tengchongite |
| 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 Tengchongite |
| Reference List: | Chen Zhangru, Luo Keding, Tan Falan, Zhang Yi, and Gu Xiaofa (1986): Tengchongite, a new mineral of hydrated calcium uranyl molybdate. Kexue Tongbao [Science Bulletin] 31, 396-401 (in Chinese). - American Mineralogist (1988), 73, 195-196 (abstract). |
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Internet Links for Tengchongite |
| Search Engines: |
Look for Tengchongite on Google
Look for Tengchongite images on Google |
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| External Links: | Look for Tengchongite on WebmineralLook for Tengchongite on Athena MineralogyLook for Tengchongite on WikipediaLook for Tengchongite on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure DatabaseSearch for Tengchongite in the Natural History Museum (London) online catalogueTengchongite details from Handbook of Mineralogy (PDF) |
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Localities for Tengchongite |