Interrelation between the physicochemical properties of MnCl2-MCl (M = Li, Na, K, Rb, and Cs) melts

Our own experimental studies of vapor pressure and surface tension were used to analyze isotherms of various types of the properties under consideration. The data obtained were processed using a mathematical model to calculate the molar surface and excess molar Gibbs energy, which clearly indicated that the surface properties obeyed the general rules that governed changes in these properties of solutions according to the position of alkali metals in the periodic table of the elements. The data on various physicochemical properties of the cesium chloride-manganese chloride system are evidence of the presence of singular extremum points on concentration dependence isotherms.     

Vapor pressure and activity of components of melts formed by manganese chloride and chlorides of alkaline-earth metals

The boiling points of melts were measured at different pressures over the melts for certain concentrations of components of the liquid phase in binary systems constituted by manganese chloride and chlorides of alkaline-earth metals. The temperature dependences of the saturated vapor pressure, normal boiling points, and enthalpies of evaporation were calculated. The concentration dependences of the thermodynamic activities of the components of four binary systems were analyzed.     

Calculation of the Thermodynamic Properties of the Copper-Zinc System from Measured Boiling Point Values

The temperature dependences of the saturated vapor pressure, the enthalpies of vaporization, standard boiling points, enthalpies, entropies, Gibbs energies, and component activities were calculated for liquid alloys of the copper-zinc system from the measured boiling points at various pressures. The calculation results were compared with the previous data obtained for this system by other methods.     

Modeling of Thermodynamic Properties and Fusion Diagrams of Ternary Oxosulfide Systems

Three different approximations are used to determine the thermodynamic properties of components and fusion diagrams of ternary oxosulfide systems FeS-FeO-Cu₂S and FeS-FeO-Ni₃S₂. The coordinates of eutectic points and eutectic temperatures are obtained, and equations for calculating the thermodynamic activities of the components are derived for the system FeS-FeO-Cu₂S.