Published in Russian Journal of Inorganic Chemistry
Voronoi-Dirichlet polyhedra and the intersecting spheres method were used to analyze the oxygen surroundings of Pb(II) and Pb(IV) atoms in the crystal structures of 433 compounds. The stereochemical activity of the lone electron pair of Pb(II) atoms was quantified. This effect is responsible for the asymmetry of the coordination sphere of Pb(II) at...
Published in Russian Journal of Inorganic Chemistry
Double borates of composition M3In(BO3)3 (M = Ba, Sr) were prepared by solid-phase reactions and studied using X-ray diffraction powder analysis and IR spectroscopy. The compounds were shown to be isostructural and to crystallize in trigonal space group \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \u...
Published in Russian Journal of Inorganic Chemistry
A tetragonal (space group I4/mmm) solid solution La2-2x(Ca1-ySry)1 + 2xMn2O7 based on the Raddlesden-Popper phase (n = 2), which is formed by the simultaneous substitution of calcium in Ca3Mn2O7 by strontium and lanthanum, is synthesized by high-temperature annealing of La2O3, Mn2O3, CaCO3, and SrCO3 mixtures (1500°C, air). The concentration area o...
Published in Russian Journal of Inorganic Chemistry
The SiO2-Fe2O3(F3O4) system has been studied in air, oxygen, and an inert atmosphere. The dissociation temperatures for iron oxides, the onset and full melting temperatures for coexisting phases, and the melt demixing temperatures have been determined as a function of the oxygen partial pressure. A scenario of the phase and chemical transformations...
Published in Russian Journal of Inorganic Chemistry
The reactions of pentaamminechloroplatinum(IV) with potassium iodide and sodium sulfite are studied. In the presence of an equimolar amount of the iodide, the chloride ions are completely substituted without subsequent displacement of the ammonia molecules that are in the trans position to the entering iodide ions. The reaction with sodium sulfite ...
Published in Russian Journal of Inorganic Chemistry
The combinatorial and topologic analysis (the TOPOS 4.0 program package, the coordination sequences method) is carried out for the crystal structures of the orthogermanates Li[6]Sc[6]Ge[4]O4 (the olivine type, space group Pnuma) and Li[6]Ho[8]Ho2[7] (GeO4)2F2 (space group I2/c). The same type of 2D TR,Ge-net with the Schläfli index of 3442 + 3242 a...
Published in Russian Journal of Inorganic Chemistry
The energies of low-energy optical transitions were calculated, using the linearized attached cylindrical waves (LACW) method, as a function of inverse diameter d−1 for (n, n) metal nanotubes with n ranging from 3 to 12 and for (n, 0) semiconductor nanotubes with n ranging from 10 to 25. The calculations show that E11 in the metal nanotubes is high...
Published in Russian Journal of Inorganic Chemistry
The structure, energy, and vibrational characteristics of different stepwise-hydrogenated closo-alane clusters Al13Hm− (m = 1–12) were calculated within the B3LYP approximation of the density functional theory using 6-31G* and 6-311+G* basis sets. For each of the m values, there is a set of several low-lying, closely spaced (within ∼0.1–0.3 eV) iso...
Published in Russian Journal of Inorganic Chemistry
The valence state of cerium ions in the ferrite garnets {Gd1.96BiCe0.04}Ga1.2Fe3.8O12, {GdBiCe0.5Ca0.5}Ga1.2Fe3.8O12, and {GdBiCe0.25Ca0.25}Ga1.2Fe3.8O12 was studied by L3 X-ray absorption spectroscopy. Information on the change in the chemical bonding in ferrite garnets upon the violation of lattice completeness was obtained from the shifts of abs...
Published in Russian Journal of Inorganic Chemistry
Specific features of the textures (the preferred orientation of the nanometer building blocks) in the structures of mixed-anion compounds—rare-earth borogermanates, germanophosphates, and borotungstates that arise from the acid-base interaction in the Ln2O3-B2O3-GeO2, Ln2O3-GeO2-P2O5, and Ln2O3-B2O3-WO3 systems (Ln = La-Gd)—have been studied. Based...
