[en] Studied is the structure of double hafnium and sodium sulfate. The Hf(SO₄)₂x3Na₂SO₄xH₂O structure determined according to the difractometric data comprises complex anions [Hf(SO₄)₅xH₂O]^6-, bound with Na⁺ cations and with hydrogen bonds. Eight O atoms, encicling a hafnium atom (Hf-02x10^-2.33A), belong to 5 sulfate groups in the water molecule. Three sulfate groups are monodentante, and two groups are bidentate-cycling in relation to Hf

[en] The X-ray structural investigation of the complex compound of La acetate with thiourea and water [La(C₂H₃O₂)₃(H₂O)₂]xSc(NH₂)₂ is carried out. Monoclinic crystals are with the following lattice parameters: a=8.641(3), b=18,780(10), c=9.932(4) A. The structure of the compound is of a shain-island type. The chains of La-decahedron formed by the atoms of oxygen of acetate groups and water molecules are created by means uniting general ribs and stretch along [100]. Thiourea molecules which interact with La polyhedron with rho... H-Osub(Hsub(2)O) hydrogen bonds are situated between them. Bond lengths in acetate groups and thiourea are common

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[en] Crystal structure of double tungstate Na₂ZrW₃O₁₂ is determined according to three-dimensional diffraction data. Specified parameters of tetragonal lattice are as follows: a=5.040(2), c=36.743(11)A, sp. gr. I4₁, Z=4. It is shown that typical zigzag-like ribbons of W(2)- and W(3)- octahedrons joined in the rib together with Na(2)- and Zr- octahedrons, bordering them (in the adjacent level) from one side and W(1) - tetrahedrons with Na(1) - octavertices from the other one, determine hybride tungsten - scheelite character of the structure. The presence of two types of tungsten-oxygen radicals which are not bonded with each other results to crystallochemical formula Na₂ZrW₂O₈(WO₄). Description of the crystal structure in the diagram of volumetrically-centered anion matrix is presented

[en] At the temperature of liquid nitrogen in a γ-irradiated monocrystal of p-nitrostyrene oxide (O-p-NS) detected are the nitrogen-centred σ-radical identified as NO₂ in the complex with the molecule of the basic substance, formyl radical and non-identified paramagnetic centres. Samples have been irradiated by the γ-rays of ⁶⁰Co with the doses of 5-30 Mrad at the temperature of liquid nitrogen. The annealing of O-p-NS monocrystals irradiated by γ-rays results in irreversible change of ESR low-temperature spectrum. Presented are the characteristics of electronic structure of nitrogen-centered free radicals, the formation of which may be supposed to be in the result of direct action of ionizing radiation on O-p-NS molecule or in result of further transformations of radiolysis products

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[en] A possibility of using X-ray emission spectra for calibration of parameters applied in semi empirical methods for molecule electronic structure calculation is considered. Connection between the position of metal level αsub(M) and the value of resonance parameter νsub(ML) with X-ray spectral parameters is disclosed. The values of parameters for these metals are determined by the experimental spectra of the metal in octahedral Pd, Rh, [Ru(CN)⁶]₄^- complexes. Relation between the X-ray spectrum profile and charge on the metal atom in analog compounds is analyzed

[en] Monocrystals of lithium holium molybdate are studied. Li⁷Ho³(MoO⁴)⁸ compound is decomposed thermally at 725 deg C in double molybdate LiHo(NoO⁴)² (sol.) and normal Li²MoO⁴ (l.). It is crystallized in the triclinic lattice parameters: a=5.191, b=6.729, c=10.279 A, d=108.10, ν=100.19, ν=66.31 deg, sp. gr. anti P1, Z=0.5. Crystal chemical composition of the lattice is as follows: Lisub(3)(Hosub(0.75))Lisub(0.25)sub(2)(MoOsub(4))sub(4). The crystal structure comprises layers of M-octagons (M=0.75Ho+0.25Li) connected by common sides and having common apexes with Mo-tetrahedrons framing them. The layers are parallel to (001) and they are bound with each other by means of Li atoms. The structure has a close similarity to scheelite type structures. Interatomic distances in molybdate are presented

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