Abstract
A series of PbxPr1-x(NO3)(2) crystals have been grown from aqueous solutions and characterized by X-ray powder diffraction. All diffraction data were well indexed according to the simple cubic structure. The variation of lattice constants with the concentrations of Pb2+ in the crystals accorded quite well to the Vegard's Law. The composition of the Sr(NO,), crystal doped with Pb2+ was studied by electron microprobe and it was found that Pb2+ was enriched in the 111 sectors. Equilibrium behavior in the Pb(NO3)(2)-Sr(NO3)(2)-H2O system was analyzed by Lippmann's phase diagram and the equilibrium distribution coefficient D-ph = 133.6. This large value of D indicates that Pb2+ ion is preferentially distributed to the solid phase.
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