Solubility polytherms and eutectic concentrations of scandium, yttrium, and lanthanum perchlorate solutions.

Freezing points of solutions M(ClO)-HO (M = Sc, Y, La) of different concentrations were determined. The solubility polytherms of the perchlorate systems studied, as well as aluminum, gallium, and indium perchlorates were compared with the concentration dependences of different properties of the corresponding solutions. Viscometry and IR spectroscopy allowed the special points on these dependences to be correlated with eutectic concentrations. Structural changes in the systems studied as a function of solute concentration were described. [ABSTRACT FROM AUTHOR]