Solubilities of lanthanum oxide in fluoride melts: Part I. Solubility in M3AlF6 (M = Li, Na, K) |
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| Authors: | M. Ambrová ,J. Juri&scaron ová |
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| Affiliation: | Department of Inorganic Technology, Faculty of Chemical and Food Technology, Slovak University of Technology, SK-81237 Bratislava, Slovakia |
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| Abstract: | Solubility of lanthanum oxide was measured by thermal analysis. The solubility in alkali cryolites is rather high, because of chemical reactions between lanthanum oxide and cryolites. In Li3AlF6-La2O3, alumina precipitates, in the other systems the mixed oxide LaAlO3 is formed. In La2O3-Li3AlF6 the eutectic point is at 9.5 mol% La2O3 and 755 °C. The eutectic points in La2O3-Na3AlF6 and La2O3-K3AlF6 are at 11.5 mol% La2O3, and at 937 and 934 °C, respectively. |
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| Keywords: | Solubility Lanthanum oxide Molten cryolite Molten fluorides Thermal analysis |
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