Behavior of molybdenum was studied in individual fused alkali chlorides and their mixtures employing electrochemical and spectroscopic techniques. Formal standard electrode potentials of molybdenum and thermodynamics of molybdenum chloride were obtained in molten LiCl, NaCl, KCl, RbCl, CsCl at 1123 K, NaCl-CsCl eutectic at 793-1023 K, NaCl-KCl equimolar mixture at 973-1123 K, LiCl-KCl-CsCl eutectic at 633-1173 K. Diffusion coefficients of molybdenum ions were determined in LiCl-KCl-CsCl eutectic melt. Electronic absorption spectra of Mo(III) ions were measured in individual salts and their mixtures and spectroscopic parameters of MoCl6
3- complex ions determined.
The behavior of molybdenum in chloride melts is studied, and the standard potentials of Mo are determined in the melts based on eutectic mixtures LiCl-KCl-CsCl (at 633-1173 K) and NaCl-CsCl (at 793-1023 K), an equimolar NaCl-KCl mixture at 973-1123 K, and individual LiCl, NaCl, KCl, RbCl, and CsCl at 1123 K. The change in the conventional standard Gibbs energy of molybdenum trichloride for mation in the NaCl-KCl, NaCl-CsCl, and LiCl-KCl-CsCl melts is calculated. The effect of the cation composition of the salt solvent on the conventional standard electrode potential of molybdenum in the chlo ride melts is considered. The diffusion coefficients of Mo(III) ions in the LiCl-KCl-CsCl melt are deter mined.
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