“…The methods used to investigate these systems are mass spectrometric analysis, (11) u.v.-vis spectrometric analysis, (12,13) entrainment, quenching and chemical transport experiments, (14) and radiochemical analysis. (15,16) We have reported thermodynamic measurements for aqueous solutions (17,18) and non-aqueous solutions (19) at room temperature, and for molten alloys, (20)(21)(22)(23) molten salt mixtures, (24,25) and molten slags (26)(27)(28) at high temperature. Very recently, we studied the thermodynamics of the rare earth vapour complexes LnAl n Cl 3n + 3 for Ln = Sc and Y with n = 2, measured by quenching experiments.…”