Structure of the solvation spheres of ions in aqueous solutions of LuCl3 according to X-ray diffraction data

Abstract

A model approach based on the experimental XRD data was used for aqueous solutions of lutetium chloride in a wide range of concentrations under the standard conditions. The parameters of the nearest environment of ions were determined. The coordination number of the lutetium ion in solutions without solvent deficiency was found to be eight. The cation was also found to form the second coordination sphere. The transition to the concentrated and saturated solutions led to a decrease in the number of water molecules in the first sphere of the cation to six. Noncontact ion associates were shown to be characteristic for all systems under study.