Abstract: | Solution Thermodynamics of FeCl2 in Molten Mixtures of Alkaline Chlorides and LaCl3 or CeCl3 Activity coefficients and the chemical excess potential of FeCl2 dissolved in molten chloride mixtures were determined by EMF measurements with galvanic cells of the type in the concentration range from 0.01–5 mole-% at 720 and 820°C. An average cationic potential is defined and used to calculate a distance parameter () for the different solvent melt mixtures. may be estimated by equations of the type |