Potential measurements of thorium tetrachloride in alkali halide solutions

Abstract

The thermodynamic behaviour of ThCl4 – alkali chloride solutions was investigated using galvanic and formation cells of the type[Formula: see text]and[Formula: see text]where ACl represents NaCl, KCl, CsCl, or equimolar mixtures of NaCl–KCl, NaCl–CsCl, and KCl–CsCl. In addition, the thermodynamic behaviour of thorium in mixed alkali chloride – alkali fluoride melts was studied using an electrometric titration technique. It was found that these melts are highly nonideal due to the formation of octahedrally coordinated complexes. Key words: ThCl4 solutions, potentials, thermodynamic properties, titration.