Classification of Wiluite |
| IMA status: | Approved 1997 |
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| Strunz 8th edition ID: | 8/C.26-20
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| Nickel-Strunz 10th (pending) edition ID: | 9.BG.35
9 : SILICATES (Germanates) B : Sorosilicates G : Sorosilicates with mixed SiO4 and Si2O7 groups; cations in octahedral [6] and greater coordination |
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Type Occurrence of Wiluite |
| Type Locality: | Vilyui River Basin (Vilui River Basin; Wilui River Basin), Saha Republic (Sakha Republic; Yakutia), Eastern-Siberian Region, Russia |
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Physical Properties of Wiluite |
| Lustre: | Vitreous |
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| Colour: | Dark green |
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| Streak: | Colourless |
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| Hardness (Mohs): | 6 |
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| Fracture: | Irregular/Uneven |
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Crystallography of Wiluite |
| Crystal System: | Tetragonal |
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Optical Data of Wiluite |
| Type: | Uniaxial (+) |
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| RI values: | nω = 1.721 nε = 1.725 |
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| Maximum Birefringence: | δ = 0.004
 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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Chemical Properties of Wiluite |
| Formula: | | Ca | | (Al,Mg,Fe,Ti) | | (B,Al,[ ]) | | Si | | O | | (O,OH) | | |
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| Essential elements: | Al, B, Ca, O, Si |
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| All elements listed in formula: | Al, B, Ca, Fe, H, Mg, O, Si, Ti |
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Relationship of Wiluite to other Species |
| Member of Group: | |
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Related Minerals - Nickel-Strunz Grouping):
- + | |
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Other Names for Wiluite |
| 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 Wiluite |
| Reference List: | Klaproth, M.H. (1797): Untersuchung des Vesuvians, Vesuvian aus Sibirien, Beiträge zur chemischen Kenntniss der Mineralkörper, Zweiter Band, Rottmann Berlin, 33-38
Canadian Mineralogist (1994): 32: 505-523.
Groat, L.A., Hawthorne, F.C., Ercit, T.S., and Grice, J.D. (1998) Wiluite, Ca19(Al,Mg,Fe,Ti)13(B,Al,[])5Si18O68(O,OH)10, a new mineral species isostructural with vesuvianite, from the Sakha Republic, Russian Federation. Canadian Mineralogist (1998): 36: 1301-1304.
Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).
Bellatreccia, F., Cámara, F, Ottolini, L., Della Ventura, G., Cibin, G., and Mottana, A. (2005) Wiluite from Ariccia, Latium, Italy: Occurrence and Crystal Structure. Canadian Mineralogist: 43: 1457-1468.
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Internet Links for Wiluite |
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| External Links: | Look for Wiluite on WebmineralLook for Wiluite on Athena MineralogyLook for Wiluite on WikipediaLook for Wiluite on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure DatabaseSearch for Wiluite in the Natural History Museum (London) online catalogue |
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Localities for Wiluite |
The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the  symbol to view information about a locality.
The  symbol next to localities in the list
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