“…From LaCl3-MgCl2 to LaCl3-CaCl2, the values of the mixing enthalpy become more negative. The behaviour of the LaCl3-MgCl2 and LaCl3-CaCl2 systems investigated in the present study is found to be similar to that of the analogous systems such as LnCl3-AECl2 (Ln = Pr [14], Nd [14], Eu [2], Gd [7,15], Yb [7,15]; AE = Mg, Ca, Sr, Ba). It appears that the enthalpies of mixing increase to more negative values from Mg to Ca which is expected from the increasing "relative ionic potential" as suggested by Hong and Kleppa [16].…”