Solubilities of lanthanum oxide in fluoride melts: Part I. Solubility in M<sub>3</sub>AlF<sub>6</sub> (M = Li, Na, K)期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Solubilities of lanthanum oxide in fluoride melts: Part I. Solubility in M₃AlF₆ (M = Li, Na, K)

Authors:	M. Ambrová ^{,J. Juri&scaron} ová

Affiliation:	Department of Inorganic Technology, Faculty of Chemical and Food Technology, Slovak University of Technology, SK-81237 Bratislava, Slovakia

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.

Keywords:	Solubility Lanthanum oxide Molten cryolite Molten fluorides Thermal analysis
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