Abstract
Literature data on internal mobility of cations in MCl-LnCl 3 systems are available only for three KCl-LnCl 3 systems (lanthanum, neodymium and dysprosium) and for one system with sodium chloride — NaCl-NdCl 3. These data, as well as mobilities of Ln 3+ cations in molten LnCl 3, calculated on the basis of electrical conductivities and molar volumes of melts, have been critically reviewed. A simple equation was proposed to describe the dependence of internal mobility of Ln 3+ cations on the LnCl 3 equivalent fraction in the melt. The single coefficient in this equation is characteristic for specified system and represents a difference between internal mobility of Ln 3+ cations in molten LnCl 3 and mobility of this cations in infinitely diluted solution of LnCl 3 in alkali metal (potassium) chloride. It has been assumed that this coefficient linearly depends on the Ln 3+ radius, what enabled calculation of internal mobilities of Ln 3+ ions for other KCl-LnCl 3 systems, not investigated yet. Significant difference between mobility of Nd 3+ cations in NaCl-NdCl 3 and KCl-NdCl 3 systems reveals that alkali metal cations distinctly affect migration properties of lanthanide ions in molten halide melts.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
