| Reference Type | Journal (article/letter/editorial) |
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| Title | Metamunirite, a new anhydrous sodium metavanadate from San Miguel County, Colorado |
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| Journal | Mineralogical Magazine | ISSN | 0026-461X |
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| Authors | Evans, Howard T. | Author |
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| Year | 1991 (December) | Volume | 55 |
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| Issue | 381 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_55/55-381-509.pdf+ |
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| DOI | doi:10.1180/minmag.1991.055.381.02Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 1760 | Long-form Identifier | mindat:1:5:1760:6 |
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| GUID | 0 |
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| Full Reference | Evans, Howard T. (1991) Metamunirite, a new anhydrous sodium metavanadate from San Miguel County, Colorado. Mineralogical Magazine, 55 (381) 509-513 doi:10.1180/minmag.1991.055.381.02 |
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| Plain Text | Evans, Howard T. (1991) Metamunirite, a new anhydrous sodium metavanadate from San Miguel County, Colorado. Mineralogical Magazine, 55 (381) 509-513 doi:10.1180/minmag.1991.055.381.02 |
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| In | (1991, December) Mineralogical Magazine Vol. 55 (381) Mineralogical Society |
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| Abstract/Notes | AbstractMetamunirite, β-NaVO3, is found in cavities in sandstone in San Miguel County, Colorado, occurring as fine, fibrous, colourless needles. X-ray powder and precession photographs show the crystals to be orthorhombic, space group Pnma, with a = 14.134(7), b = 3.648(2), c = 5.357(2) Å. They are optically biaxial positive with nα = 1.780(2) (‖c), nβ = 1.800(2) (‖a), nγ ≫ 185 (‖b, fibre axis; positive elongation), 2Vz moderate. A crystal structure analysis, confirming the previously determined structure of β-NaVO3, shows the presence of (VO3)n chains made up of zig-zag VO5 square pyramids. Metamunirite is probably formed by dehydration of munirite, NaVO3.2H2O. |
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