| Reference Type | Journal (article/letter/editorial) |
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| Title | The crystal chemistry of the uranyl carbonate mineral grimselite, (K, Na)3Na[(UO2)(CO3)3](H2O), from Jáchymov, Czech Republic |
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| Journal | Mineralogical Magazine |
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| Authors | Plášil, J. | Author |
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| Fejfarová, K. | Author |
| Skála, R. | Author |
| Škoda, R. | Author |
| Meisser, N. | Author |
| Hlousek, J. | Author |
| Císařová, I. | Author |
| Dušek, M. | Author |
| Veselovský, F. | Author |
| Čejka, J. | Author |
| Sejkora, J. | Author |
| Ondruš, P. | Author |
| Year | 2012 (June) | Volume | 76 |
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| Issue | 3 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/rruff_1.0/uploads/MM76_443.pdf+ |
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| DOI | doi:10.1180/minmag.2012.076.3.01Search in ResearchGate |
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| Generate Citation Formats |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 244226 | Long-form Identifier | mindat:1:5:244226:0 |
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| GUID | 0 |
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| Full Reference | Plášil, J., Fejfarová, K., Skála, R., Škoda, R., Meisser, N., Hlousek, J., Císařová, I., Dušek, M., Veselovský, F., Čejka, J., Sejkora, J., Ondruš, P. (2012) The crystal chemistry of the uranyl carbonate mineral grimselite, (K, Na)3Na[(UO2)(CO3)3](H2O), from Jáchymov, Czech Republic. Mineralogical Magazine, 76 (3) 443-453 doi:10.1180/minmag.2012.076.3.01 |
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| Plain Text | Plášil, J., Fejfarová, K., Skála, R., Škoda, R., Meisser, N., Hlousek, J., Císařová, I., Dušek, M., Veselovský, F., Čejka, J., Sejkora, J., Ondruš, P. (2012) The crystal chemistry of the uranyl carbonate mineral grimselite, (K, Na)3Na[(UO2)(CO3)3](H2O), from Jáchymov, Czech Republic. Mineralogical Magazine, 76 (3) 443-453 doi:10.1180/minmag.2012.076.3.01 |
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| Abstract/Notes | Two crystals of the uranyl carbonate mineral grimselite, ideally K3Na[(UO2)(CO3)3](H2O), from Jáchymov in the Czech Republic were studied by single-crystal X-ray diffraction and electron-probe microanalysis. One crystal has considerably more Na than the ideal chemical composition due to substitution of Na into KO8 polyhedra; the composition of the other crystal is nearer to ideal, and similar to synthetic grimselite. The presence of Na atoms in KO8 polyhedra, which are located in channels in the crystal structure, reduces their volume, and as a result the unit-cell volume also decreases. Structure refinement shows that the formula for the sample with the anomalously high Na content is (K2.43Na0.57)Σ3.00Na[(UO2)(CO3)3](H2O). The unit-cell parameters, refined in space group P2c, are a = 9.2507(1), c = 8.1788(1) Å, V = 606.14(3) Å3 and Z = 2. The crystal structure was refined to R1 = 0.0082 and wR1 = 0.0185 with a GOF = 1.33, based on 626 observed diffraction peaks [Iobs>3σ(I)]. |
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