[en] Linear extrapolation of experimental data obtained on low concentration mixtures DyCl₃ + HCl allows the determination of dysprosium limit equivalent conductibility, which is 62.9 ± 0.7 Ω^-1 cm² eq^-1. Experiments on very diluted DyCl₃ in pure water evidences a slight hydrolysis of the cation, the first constant is estimated to be about 6.10^-8 M (pK = 7.2 ± 0.5) by using the Onsager-Kim law on electrolyte mixtures

[en] Crystalline dysprosium dichloride has been prepared by means of interaction between pressed mixture of DyCl₃ powder and metallic dysprosium filings. The substance is studied by powder X-ray diffraction method. By the method of homology its monoclinic crystal system is ascertained, structural type being EuI₂. Unit cell parameters and X-ray density are as follows: a = 6.81 ± 0.04 A, b = 13.29 ± 0.04 A, c = 7.10 ± 0.02 A, β =91.56 ± 0.23 deg. At Z = 8 ρ_roent = 4.83 ± 0.02 g/cm³, ρ_exp = 4.77 ± 0.04 g/cm³

No abstract available

[en] The possibility of forming the clusters An₂Cl₃ (An = Th, U, Np) from a homogeneous melt is studied. Reaction of AnCl₃ (An = U and Np) or ThCl₄ with DyCl₂ results in reduction to the metallic actinide

[en] E.m.f. of solid-phase galvanic cells: (-)Sr|SrCl₂||BaCl₂||DyCl₂|Dy(+) and (-)Ca|CaCl₂||BaCl₂||DyCl₂|Dy(+) were measured. Experimental data were processed according to the method of the 3d law of thermodynamics, using publication values of thermodynamic characteristics of e.m.f. - forming reaction participants. The value of formation enthalpy was obtained: Δ_fH⁰(DyCl₂, cryst., 298.15 K) = 676.4+-2.5 kJ x mol^-1

[en] Solubility has been studied at 20 and 40 deg C in aqueous-salt systems containing dysprosium chloride and hydrochlorides of mono-(1), di- (2), and trimethylamines (3). The isotherms of system 1 are of the eutonic type. The initial salt components, six-watered crystalohydrate of dysprosium chloride and methylamine hydrochloride, are the equilibrium solid phases of saturated solutions. The solubility isotherms of system 2 and 3 point to the formation of the compounds DyCl₃x5(CH₃)₂NHxHCl and DyCl₃x4(CH₃)₃NxHCl. Their individuality has been proved by DTA and composition confirmed by chemical analysis

No abstract available

[en] The isotope effect on the internal mobility of the dysprosium ion in molten dysprosium chloride has been measured from 973 to 1,073 K by countercurrent electromigration. Heavier Dy isotopes have been enriched toward the anode. The mass effect defined by μ = (Δu/u_Dy)/(ΔM/M_Dy) has been calculated to be -0.032, where Δu is the difference in the mobilities of M (mass number) = 160, 161, 163, or 164 with reference to that of M = 162. A comparison of this value with those previously determined for other molten metal chloride systems suggests that the main electrically conducting species containing Dy is the trivalent cation and not the species shown to exist in the melt by other techniques

No abstract available

[en] The Raman spectroscopic studies for rare earth halides and their binary melt systems with alkali halides have shown that the predominant species of YCl₃-ACl binary system rich in ACl (X_YCl3 < 0.25, A = alkali metal) are the YCl₆^3- octahedra. It was reported that the octahedral symmetry of rare earth metal halides is distorted in small-cation-rich systems having larger polarizing power. In the present study, DyCl3-LiCl-KCl ternary system was investigated with high-temperature Raman spectroscopy to identify the ionic species in chloride melts. The Raman spectra of dysprosium chloride lithium-potassium chloride ternary system was characterized at various DyCl₃ concentrations. The corner- or edge-sharing species of distorted octahedral DyCl₆^3- complexes have been observed in the melts of high DyCl₃ concentration (≥ 31 mol%)