Classification of Cleusonite |
| IMA status: | Approved 1998 |
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| Strunz 8th edition ID: | 4/C.09-90
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| Nickel-Strunz 10th (pending) edition ID: | 4.CC.40
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates) C : Metal: Oxygen = 2: 3,3: 5, and similar C : With large and medium-sized cations |
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| mindat.org URL: | http://www.mindat.org/min-26262.html Please feel free to link to this page. |
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Type Occurrence of Cleusonite |
| Type Locality: | Cleuson lake, Nendaz Valley, Wallis (Valais), Switzerland |
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| General Appearance of Type Material: | cm-sized tabular crystals |
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| Geological Setting of type material: | greenschist facies metamorphosed gneissic series of the Mont Fort and Siviez-Mischabel Nappes |
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Physical Properties of Cleusonite |
| Lustre: | Sub-Metallic |
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| Diaphaneity (Transparency): | Opaque |
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| Colour: | Black |
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| Density (measured): | 4.74 - 4.93 g/cm3 |
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| Density (calculated): | 5.27 g/cm3 |
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Crystallography of Cleusonite |
| Crystal System: | Trigonal |
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| Class (H-M): | 3 - Pyramidal |
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| Space Group: | R3 |
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| Cell Parameters: | a = 10.385(2) Å, c = 20.900(7) Å
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| Ratio: | a:c = 1 : 2.013 |
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| Unit Cell Volume: | V 1,952.05 ų (Calculated from Unit Cell) |
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| Morphology: | Multiple rhombohedra and hexagonal prisms. |
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| Twinning: | Generally twinned. |
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| Comment: | Cells: a = 10.576(3), c = 21.325(5) Å (untreated crystal) to a = 10.4188(6), c = 20.942(1) Å (800°C treatment) and to a = 10.385(2), c = 20.900(7) Å (1000°C treatment). |
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Optical Data of Cleusonite |
| Type: | Isotropic |
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| Colour in reflected light: | light grey to white |
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Chemical Properties of Cleusonite |
| Formula: | | (Pb,Sr)(U | | ,U | | )(Fe | | ,Zn) | | (Ti,Fe | | ,Fe | | ) | | (O,OH) | | |
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| All elements listed in formula: | Fe, H, O, Pb, Sr, Ti, U, Zn |
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| Common Impurities: | Al,Mn,V |
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Relationship of Cleusonite to other Species |
| Member of Group: | |
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Related Minerals - Nickel-Strunz Grouping):
- + | |
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Other Names for Cleusonite |
| 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 Cleusonite |
| Reference List: | Wülser, P.-A., Meisser, N., Brugger, J., Schenk, K., Ansermet, S., Bonin, M., Bussy, F. (2005): Cleusonite, (Pb,Sr)(U4+,U6+)(Fe2+,Zn)2(Ti,Fe2+,Fe3+)18(O,OH)38, a new mineral species of the crichtonite group from the western Swiss Alps. European Journal of Mineralogy, 17, 933-942 |
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Internet Links for Cleusonite |
| Search Engines: |
Look for Cleusonite on Google
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| External Links: | Look for Cleusonite on WebmineralLook for Cleusonite on Athena MineralogyLook for Cleusonite on WikipediaLook for Cleusonite on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure DatabaseSearch for Cleusonite in the Natural History Museum (London) online catalogue |
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Localities for Cleusonite |
The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the  symbol to view information about a locality.
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