| Reference Type | Journal (article/letter/editorial) |
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| Title | Kinetics and Mechanism of Hübnerite (MnWO4) and Ferberite (FeWO4) Crystallization under Hydrothermal Conditions |
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| Journal | Zeitschrift für Naturforschung A |
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| Authors | Buhl, J. Chr. | Author |
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| Willgallis, A. | Author |
| Year | 1984 (October 1) | Volume | 39 |
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| Page(s) | 963-965 | Issue | 10 |
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| Publisher | Walter de Gruyter GmbH |
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| URL | |
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| DOI | doi:10.1515/zna-1984-1009Search 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 | 10716982 | Long-form Identifier | mindat:1:5:10716982:6 |
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| GUID | 0 |
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| Full Reference | Buhl, J. Chr., Willgallis, A. (1984) Kinetics and Mechanism of Hübnerite (MnWO4) and Ferberite (FeWO4) Crystallization under Hydrothermal Conditions. Zeitschrift für Naturforschung A, 39 (10). 963-965 doi:10.1515/zna-1984-1009 |
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| Plain Text | Buhl, J. Chr., Willgallis, A. (1984) Kinetics and Mechanism of Hübnerite (MnWO4) and Ferberite (FeWO4) Crystallization under Hydrothermal Conditions. Zeitschrift für Naturforschung A, 39 (10). 963-965 doi:10.1515/zna-1984-1009 |
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| In | (1984, January) Zeitschrift für Naturforschung A Vol. 39 (10) Walter de Gruyter GmbH |
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| Abstract/Notes | Abstract
The kinetics of the crystallization of hiibnerite (MnWO4) and ferberite (FeWO4) was studied by hydrothermally reacting the metal (II)-chlorides and sodium tungstate in a special autoclave at two temperatures (300 °C. 400 °C) and a pressure of 1 kbar. The rates of crystallization were determined by continual removal of the reactants from the autoclave. At both temperatures, the decrease of tungstate concentration in solution followed at first order reaction. The rate constants of the reactions were calculated and the Jerofejev-equation was used to describe the kinetics. The rate of hiibnerite formation was larger and increased faster with temperature. This should affect the formation of mixed crystals by initiating a shift of the composition towards higher MnWO4/FeWO4 ratios and might well account for a zonation or inhomogeneity of natural wolframites. |
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