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Journal of Structural Chemistry

2008 year, number 5

X-ray diffraction experiment on DyBr3:20H2O, YbBr3:20H2O solutions. Pre-main peak as a prerequisite to consider the structural organization of solutions

O. V. Grechin, V. V. Kuznetsov, M. V. Yakimova
Keywords: aqueous solutions, lanthanide cations, X-ray diffraction method, pre-main peak (PMP), diffusion-averaged structure (D-structure), cation coordination environment, simulation of solutions
Pages: 982-984


Primary data of the X-ray diffraction experiment on DyBr3 and YbBr3 aqueous solutions in salt:water molar ratios of 1:20 are presented. The occurrence of a pre-main peak in the curves of normalized scattering intensities determines the average distance between cations in these solutions, and hence, directs to a model description of the structure of solutions. Based on the determination of boundaries of the cation complex and taking into account the deficit of solvent, the model of the cation complex is supposed to consist of two coordination shells involving at least two anions.