Electrochemical and thermodynamic properties of thulium trichloride in a molten NaCl-KCl-CsCl eutectic

Potentiometric method was used to measure the redox potentials of Tm³⁺/Tm²⁺ in a eutectic melt of sodium, potassium, and cesium chlorides relative to a chlorine reference electrode in the temperature range 823–973 K. The main thermodynamic characteristics of the redox reaction TmCl_2(solution) + 1/2Cl_2(g) ⇆ TmCl_3(solution) were calculate from the conditional standard potentials $ E_{{{Tm^{3 + } } mathord{left/ {vphantom {{Tm^{3 + } } {Tm^{2 + } }}} right. kern-nulldelimiterspace} {Tm^{2 + } }}}^* $ E_{{{Tm^{3 + } } mathord{left/ {vphantom {{Tm^{3 + } } {Tm^{2 + } }}} right. kern-nulldelimiterspace} {Tm^{2 + } }}}^* .