| Reference Type | Journal (article/letter/editorial) |
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| Title | Mineralogical and cathodoluminescence characteristics of Ca-rich kutnohorite from the Úrkút Mn-carbonate mineralization, Hungary |
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| Journal | Mineralogical Magazine |
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| Authors | Polgári, M. | Author |
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| Bajnóczi, B. | Author |
| Kovács Kis, V. | Author |
| Götze, J. | Author |
| Dobosi, G. | Author |
| Tóth, M. | Author |
| Vigh, T. | Author |
| Year | 2007 (October) | Volume | 71 |
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| Page(s) | 493-508 | Issue | 5 |
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| Publisher | Mineralogical Society |
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| DOI | doi:10.1180/minmag.2007.071.5.493Search in ResearchGate |
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| Mindat Ref. ID | 243772 | Long-form Identifier | mindat:1:5:243772:3 |
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| GUID | b32236bf-d8fa-4cfb-b838-1b19bdad7e0c |
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| Full Reference | Polgári, M., Bajnóczi, B., Kovács Kis, V., Götze, J., Dobosi, G., Tóth, M., Vigh, T. (2007) Mineralogical and cathodoluminescence characteristics of Ca-rich kutnohorite from the Úrkút Mn-carbonate mineralization, Hungary. Mineralogical Magazine, 71 (5) 493-508 doi:10.1180/minmag.2007.071.5.493 |
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| Plain Text | Polgári, M., Bajnóczi, B., Kovács Kis, V., Götze, J., Dobosi, G., Tóth, M., Vigh, T. (2007) Mineralogical and cathodoluminescence characteristics of Ca-rich kutnohorite from the Úrkút Mn-carbonate mineralization, Hungary. Mineralogical Magazine, 71 (5) 493-508 doi:10.1180/minmag.2007.071.5.493 |
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| Abstract/Notes | AbstractKutnohorite with moderate and bright orange-red cathodoluminescence (CL) was studied by CL microscopy and spectroscopy. This mineral was found in fossiliferous concretions composed mainly of rhodochrosite from the Mn-carbonate mineralization at Úrkút, Hungary. The CL microscopy reveals that kutnohorite occurs as impregnations, layers and veinlets. X-ray diffraction, infrared spectroscopy and electron microprobe studies indicate that the luminescent kutnohorite has excess Ca (72.9–80.0 mol.% CaCO3, 16.3–20.5 mol.% MnCO3, 3.3–5.6 mol.% MgCO3 and 0.0–0.5 mol.% FeCO3). Transmission electron microscopy shows that the luminescent carbonate has a dolomite-type structure, with modulated and mosaic microstructures. The CL spectra of this Ca-rich kutnohorite have a single emission band at 630 nm that is characteristic of Mn2+ substitution in the structure. Our results provide evidence for moderate-to-bright cathodoluminescence of Mn-rich natural carbonates even at 8–10 wt.% Mn and up to 2400 ppm Fe. The self-quenching of Mn appears incomplete in the case of Ca-rich kutnohorite from Úrkút. |
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