Classification of Povondraite |
| IMA status: | Approved |
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| Strunz 8th edition ID: | 8/E.19-75
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| Nickel-Strunz 10th (pending) edition ID: | 9.CK.05
9 : SILICATES (Germanates) C : Cyclosilicates K : [Si6O18]12- 6-membered single rings, with insular complex anions |
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| Dana 7th edition ID: | 61.3.1.8 |
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| Dana 8th edition ID: | 61.3.1.6
61 : CYCLOSILICATES Six-Membered Rings 3 : Six-Membered Rings with borate groups |
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| mindat.org URL: | http://www.mindat.org/min-3274.html Please feel free to link to this page. |
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Type Occurrence of Povondraite |
| Type Locality: | Alto Chapare District, Chapare Province, Cochabamba Department, Bolivia |
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| Year of Discovery: | 1993 |
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Physical Properties of Povondraite |
| Lustre: | Resinous |
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| Colour: | Dark brown to brownish black |
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| Streak: | Brown |
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| Hardness (Mohs): | 7 |
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| Cleavage: | None Observed |
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Crystallography of Povondraite |
| Crystal System: | Trigonal |
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| Cell Parameters: | a = 16.18Å, c = 7.44Å
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| Ratio: | a:c = 1 : 0.46 |
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| Unit Cell Volume: | V 1,686.79 ų (Calculated from Unit Cell) |
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Optical Data of Povondraite |
| Type: | Uniaxial (-) |
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| RI values: | nω = 1.820 nε = 1.751 |
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| Maximum Birefringence: | δ = 0.069
 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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Chemical Properties of Povondraite |
| Formula: | | [Na][Fe | | ][Fe | | ][O | | |OH|(BO | | ) | | |Si | | O | | ] |
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| Essential elements: | B, Fe, H, Na, O, Si |
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| All elements listed in formula: | B, Fe, H, Na, O, Si |
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| Common Impurities: | K,Mg,Al,Cu,Pb,Sn,Ti,V,H2O |
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Relationship of Povondraite to other Species |
| Member of: | Tourmaline Group |
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| Related Minerals - Nickel-Strunz Grouping): | | 9.CK.05 | Buergerite | | [Na][Fe | | ][Al | | ][O | | |F|(BO | | ) | | |Si | | O | | ] |
| | 9.CK.05 | Chromdravite | | [Na][Mg | | ][(Cr | | ,Fe | | ) | | ][(OH) | | |OH|(BO | | ) | | |Si | | O | | ] |
| | 9.CK.05 | Dravite | | [Na][Mg | | ][Al | | ][(OH) | | |OH|(BO | | ) | | |Si | | O | | ] |
| | 9.CK.05 | Elbaite | | [Na][(Li,Al) | | ][Al | | ][(OH) | | |OH|(BO | | ) | | |Si | | O | | ] |
| | 9.CK.05 | Feruvite | | [Ca][(Fe | | ,Mg) | | ][MgAl | | ][(OH) | | |OH|(BO | | ) | | |Si | | O | | ] |
| | 9.CK.05 | Foitite | | [ ][Fe | | (Al,Fe | | )][Al | | ][(OH) | | |OH|(BO | | ) | | |Si | | O | | ] |
| | 9.CK.05 | Liddicoatite | | [Ca][Li | | Al][Al | | ][(OH) | | |F|(BO | | ) | | |Si | | O | | ] |
| | 9.CK.05 | Olenite | | ([ ],Na)[(Al,Li) | | ][Al | | ][(O,OH) | | |OH|(BO | | ) | | |Si | | O | | ] |
| | 9.CK.05 | Schorl | | [Na][Fe | | ][Al | | ][(OH) | | |OH|(BO | | ) | | |Si | | O | | ] |
| | 9.CK.05 | Uvite | | [Ca][(Mg,Fe | | ) | | ][MgAl | | ][(OH) | | |OH|(BO | | ) | | |Si | | O | | ] |
| | 9.CK.05 | Magnesiofoitite | | [ ][Mg | | (Al,Fe | | )][Al | | ][(OH) | | |OH|(BO | | ) | | |Si | | O | | ] |
| | 9.CK.05 | Rossmanite | | [ ][LiAl | | ][Al | | ][(OH) | | |OH|(BO | | ) | | |Si | | O | | ] |
| | 9.CK.05 | Vanadiumdravite | | [Na][Mg | | ][V | | ][(OH) | | |OH|(BO | | ) | | |Si | | O | | ] |
| | 9.CK.05 | Oxy-Dravite | | Na (MgAl | | )(MgAl | | )Si | | O | | (BO | | ) | | (OH) | | O |
| | 9.CK.05 | Oxy-rossmanite | | [ ][LiAl | | ]Al | | (BO | | ) | | [Si | | O | | ](OH) | | (O) |
| | 9.CK.10 | Abenakiite-(Ce) | | | 9.CK.15 | Scawtite | | | 9.CK.20 | Steenstrupine-(Ce) | | Na | | Mn | | (Fe | | ,Mn | | ) | | Ce | | (Zr,Th)[(OH) | | |HPO | | |(PO | | ) | | |(Si | | O | | ) | | ]·2H | | O |
| | 9.CK.20 | Thorosteenstrupine | |
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| Related Minerals - Dana Grouping): | | 61.3.1.1 | Foitite | | [ ][Fe | | (Al,Fe | | )][Al | | ][(OH) | | |OH|(BO | | ) | | |Si | | O | | ] |
| | 61.3.1.2 | Magnesiofoitite | | [ ][Mg | | (Al,Fe | | )][Al | | ][(OH) | | |OH|(BO | | ) | | |Si | | O | | ] |
| | 61.3.1.3 | Rossmanite | | [ ][LiAl | | ][Al | | ][(OH) | | |OH|(BO | | ) | | |Si | | O | | ] |
| | 61.3.1.4 | Liddicoatite | | [Ca][Li | | Al][Al | | ][(OH) | | |F|(BO | | ) | | |Si | | O | | ] |
| | 61.3.1.5 | Uvite | | [Ca][(Mg,Fe | | ) | | ][MgAl | | ][(OH) | | |OH|(BO | | ) | | |Si | | O | | ] |
| | 61.3.1.6 | Feruvite | | [Ca][(Fe | | ,Mg) | | ][MgAl | | ][(OH) | | |OH|(BO | | ) | | |Si | | O | | ] |
| | 61.3.1.7 | Buergerite | | [Na][Fe | | ][Al | | ][O | | |F|(BO | | ) | | |Si | | O | | ] |
| | 61.3.1.9 | Olenite | | ([ ],Na)[(Al,Li) | | ][Al | | ][(O,OH) | | |OH|(BO | | ) | | |Si | | O | | ] |
| | 61.3.1.10 | Elbaite | | [Na][(Li,Al) | | ][Al | | ][(OH) | | |OH|(BO | | ) | | |Si | | O | | ] |
| | 61.3.1.11 | Dravite | | [Na][Mg | | ][Al | | ][(OH) | | |OH|(BO | | ) | | |Si | | O | | ] |
| | 61.3.1.12 | Schorl | | [Na][Fe | | ][Al | | ][(OH) | | |OH|(BO | | ) | | |Si | | O | | ] |
| | 61.3.1.13 | Chromdravite | | [Na][Mg | | ][(Cr | | ,Fe | | ) | | ][(OH) | | |OH|(BO | | ) | | |Si | | O | | ] |
| | 61.3.1.14 | Vanadiumdravite | | [Na][Mg | | ][V | | ][(OH) | | |OH|(BO | | ) | | |Si | | O | | ] |
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Other Names for Povondraite |
| Synonyms: | |
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| German names: | |
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| Japanese names: | |
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| Russian 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 Povondraite |
| Reference List: | American Mineralogist (1979): 64: 945-948.
Grice, J.D., T.S. Ercit, and F.C. Hawthorne (1993), Povondraite, a redefinition of the tourmaline ferridravite: American Mineralogist: 78: 433-436.
New Minerals (1997), New Minerals 1990-1994.
Zacek, V., Petrov, A., and Hyrsl, J. (1998) Chemistry and origin of povondraite-bearing rocks from Alto Chapare, Cochabamba, Bolivia. Journal ofn the Czech Geological Society: 43: 59-67.
Journal of the Czech Geological Society, Prague (2000): 45: 3-12.
Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).
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Internet Links for Povondraite |
| Search Engines: |
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| External Links: | Look for Povondraite on WebmineralLook for Povondraite on Athena MineralogyLook for Povondraite on WikipediaLook for Povondraite on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure DatabaseSearch for Povondraite in the Natural History Museum (London) online cataloguePovondraite details from Handbook of Mineralogy (PDF) |
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| Mineral Dealers: | Search for Povondraite on minvision.comWright's Rock Shop - excellent mineral specimens since 1970Rare and Unusual minerals at Mineralogical Research CompanyHigh-end worldwide specimens & outstanding customer serviceWilensky Fine MineralsFine Minerals from Dan Weinrich MineralsBuy fine minerals and gemstones from Pala InternationalBuy Fine Minerals from mineralsweb.comBuy from David K Joyce mineralsFind Povondraite on www.crystalclassics.co.ukSearch for Povondraite at Thames Valley MineralsTop quality minerals from Kristalle of California |
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| Jobs: | Mining & Geology Jobs |
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Localities for Povondraite |