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On the solubility of lanthanum oxide in molten alkali fluorides

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Abstract

The solubilities of lanthanum oxide in LiF, NaF, KF and eutectic melt LiF-NaF-KF (46.5 mole% LiF; 11.5 mole% NaF and 42.0 mole% KF) were measured in order to find the suitable electrolyte for electrodeposition of lanthanum. Solidus-liquidus lines were obtained by the method of thermal analysis. The solubility of lanthanum oxide in alkali fluorides is rather low and decreases in the order LiF>NaF>KF.

It was found that lanthanum oxide reacts with the components of the melt. LaOF and alkali metal oxide are formed during dissolution of La2O3 in the melt.

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Authors and Affiliations

  1. Department of Inorganic Chemistry, Technology and Materials, Faculty of Chemical and Food Technology, Slovak University of Technology, 812 37, Bratislava, Slovakia

    M. Ambrová, J. Jurišová, V. Danielik & J. Gabčová

Authors
  1. M. Ambrová
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  2. J. Jurišová
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  3. V. Danielik
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  4. J. Gabčová
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Correspondence to M. Ambrová.

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Ambrová, M., Jurišová, J., Danielik, V. et al. On the solubility of lanthanum oxide in molten alkali fluorides. J Therm Anal Calorim 91, 569–573 (2008). https://doi.org/10.1007/s10973-007-8533-6

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  • DOI: https://doi.org/10.1007/s10973-007-8533-6

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