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The solubilities of Yb(ClO4)3. 3H2O-18C6-C2H5OH ternary system at 25 were invstigated by a semimicro method for study of phase equilibrium. and the refractive indexes of saturated solutions were determined. The behavior of water in this system during the equilibrium was examined. The results indicate that there are two kinds of complexes formed in the system, their chemical compositions are: Yb(ClO4)3 18C6. 3H2O. 2C2H5OH (I) and Yb(ClO4)3 18C6 3H2O C2H5OH. Both are incongruently soluble in EtOH. The influences of rare earth ions and salt anions on formation of complexes were discussed. The two solid complexes have been prepared, and their composihons and properties have been investigated by chemical analysis, IR, DTG and DSC. According to the DSC, the enthalpies of some steps during the decomposition have been obtained for complexes and .
The behavior of water in this system during the equilibrium was examined. The results indicate that there are two kinds of complexes formed in the system, their chemical compositions are: Yb (ClO4) 3 18C6. 3H2O. 2C2H5OH (I) and Yb (ClO4) 3 18C6 3H2O C2H5OH. Both are incongruently soluble in EtOH. The influences of rare earth ions and salt anions on formation of complexes were discussed. The two solid complexes have been prepared, and their composihons and properties have been investigated by chemical analysis, IR, DTG and DSC. According to the DSC, the enthalpies of some steps during the decomposition have been obtained for complexes and.