Behavior of the Al<Subscript>2</Subscript>O<Subscript>3</Subscript>-ZrO<Subscript>2</Subscript> System at High Temperatures

The system Al₂O₃-ZrO₂ at temperatures of up to 2100°C was studied by differential thermal analysis.__________Translated from Zhurnal Prikladnoi Khimii, Vol. 78, No. 3, 2005, pp. 353–356.Original Russian Text Copyright © 2005 by Kamaev, Archugov, Mikhailov.     

New Catalytic Reactions in the Presence of Mo-V-Phosphoric Heteropoly Acid Solutions

The possibility of performing new catalytic reactions in the presence of solutions of H _x+3PMo_12−x . V_xO₄₀ Mo-V-phosphoric heteropoly acids was examined.__________Translated from Zhurnal Prikladnoi Khimii, Vol. 78, No. 5, 2005, pp. 772–778.Original Russian Text Copyright © 2005 by Zhizhina, Simonova, Russkikh, Matveev.     

Complexation processes in KF-SbF<Subscript>3</Subscript>-H<Subscript>2</Subscript>O system studied by calorimetric titration

Complexation in a KF-SbF₃-H₂O system is studied in a range of molar ratios of fluorides KF : SbF₃= (0.1–2) : 1 by calorimetric titration. The equilibrium formation constants of complexes KSb₂F₇, KSbF₄, and K₂SbF₅ (5.8×10⁵±800, 3.3×10⁴±500, and 1.9×10⁶± 950, respectively) and the changes in enthalpy (–31.75± 0.74, –28.15±0.44, and –25.5±0.64 J mol^–1, respectively) and entropy (4±7, –8±5, and –35±9 J mol^–1 K^–1, respectively) are determined. The thermodynamic stability of the antimony(III) fluoride complexes is found to increase on going from KSb₂F₇ to K₂SbF₅.Translated from Koordinatsionnaya Khimiya, Vol. 31, No. 3, 2005, pp. 168–171.Original Russian Text Copyright © 2005 by Kovaleva, Zemnukhova, Lebedeva, Fedorishcheva.This revised version was published online in April 2005 with a corrected cover date.This revised version was published online in April 2005 with a corrected cover date.     

Electrochemical Precipitation of Dispersed Ni-Ag Powders in Ammonia Electrolytes

The electrochemical precipitation of a dispersed Ni-Ag powder from aqueous systems [Ni(NH₃)₆]²⁺-[Ag(NH₃)₂]⁺-(NH₄)₂SO₄−NH₃ ⋂ H₂O was studied.__________Translated from Zhurnal Prikladnoi Khimii, Vol. 78, No. 4, 2005, pp. 563–565.Original Russian Text Copyright © 2005 by Kuntyi, Olenych.     

Improved Synthesis of Thiofluorescein

Thiofluorescein was synthesized in a preparative yield by successive demethylation of 3,3′-dimethoxydiphenyl sulfide to 3,3′-dihydroxydiphenyl sulfide and condensation of the latter with phthalic anhydride in H₂SO₄. The title compound was also obtained in a higher yield from 3,3′-dimethoxydiphenyl sulfide directly in a one-pot process combining the condensation in H₂SO₄ and demethylation in 2 Py · H₂SO₄.__________Translated from Zhurnal Organicheskoi Khimii, Vol. 41, No. 1, 2005, pp. 60–63.Original Russian Text Copyright © 2005 by Russkikh, Konstantinova, Berezhnaya, Gerasimova, Shelkovnikov.     

Hydrothermal Synthesis of Magnesium Silicate Montmorillonite for Polymer-Clay Nanocomposites

Conditions of hydrothermal synthesis of magnesium silicate montmorillonite Mg₃Si₄O₁₀(OH)₂·nH₂O with a particle size of 50–100 nm are optimized, including the temperature, initial chemicals, reaction medium, and run duration.__________Translated from Zhurnal Prikladnoi Khimii, Vol. 78, No. 1, 2005, pp. 28–35Original Russian Text Copyright © 2005 by Golubeva, Korytkova, Gusarov.     

Interaction of Cl<Subscript>2</Subscript> and SO<Subscript>2</Subscript> with Finely Divided In<Subscript>2</Subscript>O<Subscript>3</Subscript>

The effect of O₂, Cl₂, and SO₂ on electrophysical and sorption properties of powdered In₂O₃ with a large specific area is studied at 23–200°C. The specimen is most sensitive to Cl₂ and SO₂ at near-room temperatures.__________Translated from Elektrokhimiya, Vol. 41, No. 5, 2005, pp. 529–536.Original Russian Text Copyright © 2005 by Vinokurova, Derlyukova.     

Synthesis and Properties of Scandium and Alkaline-Earth Double Borates M<Subscript>3</Subscript>Sc(BO<Subscript>3</Subscript>)<Subscript>3</Subscript>

Compounds M₃Sc(BO₃)₃ (M = Ba, Sr) were prepared by solid-phase reactions and studied by X-ray diffraction (XRD) analysis and IR spectroscopy. The structural type of the compounds was determined and their unit cell parameters were refined.__________Translated from Zhurnal Prikladnoi Khimii, Vol. 78, No. 1, 2005, pp. 25–27.Original Russian Text Copyright © 2005 by Khamaganova, Khrushcheva.     

Sorption of Light Fullerenes (C<Subscript>60</Subscript> and C<Subscript>70</Subscript>) on Materials Prepared by Sublimation of Graphite Rods

Sorption of fullerenes C₆₀ and C₇₀ from o-xylene, toluene, and o-dichlorobenzene solutions under static conditions on a sorbent prepared by sublimation of graphite rods was studied. The sorption isotherms of both fullerenes at 25°C were measured.__________Translated from Zhurnal Prikladnoi Khimii, Vol. 78, No. 2, 2005, pp. 345–346.Original Russian Text Copyright © 2005 by Semenov, Arapov, Charykov, Nekrasov, Alekhin, Gerasimov, Seregin.     

Preparation of Titanium Phosphate Sorbents from Products of Processing Sphene Concentrate and Properties of These Sorbents

Procedures for the preparation and granulation of sorbents based on TiO(HPO₄)·nH₂O from the products of processing of sphene concentrate were developed. The sorption and hydrodynamic characteristics of the sorbents were determined.__________Translated from Zhurnal Prikladnoi Khimii, Vol. 78, No. 1, 2005, pp. 66–72.Original Russian Text Copyright © 2005 by Ivanenko, Lokshin, Vladimirova, Avsaragov.     

Eutectic Composition Systems NaF-DyF3, NaF-HoF3, and MgF2-ScF3 as Ionic Conductors

Electrophysical properties of eutectic composites formed in the NaF-DyF₃, NaF-HoF₃, and MgF₂-ScF₃ systems are studied at 18–528°C. The conductivity of 25NaF-75DyF₃, 25NaF-75HoF₃, and 55MgF₂-45ScF₃ at 20°C (9 × 10⁻⁸, 3 × 10⁻⁷, and 2 × 10⁻⁶ S/cm) exceed that of the initial materials by 2–4 orders of magnitude.__________Translated from Elektrokhimiya, Vol. 41, No. 8, 2005, pp. 1010–1013.Original Russian Text Copyright © 2005 by Sorokin, Buchinskaya, Bystrova, Konovalova, Sobolev.     

Ba3 ? xSrxSm(BO3)3 Solid Solutions (0 < x < 3)

Samples of a continuous series of Ba_{3 − x} Sr _x Sm(BO₃)₃ solid solutions (0 < x < 3), crystallizing in the trigonal crystal (system, space group R3ˉ) were synthesized by solid-phase reactions. Formation of a continuous series of solid solutions in the system was confirmed by X-ray phase analysis. The X-ray characteristics of phases of variable composition were determined. __________ Translated from Zhurnal Prikladnoi Khimii, Vol. 78, No. 12, 2005, pp. 2054–2055. Original Russian Text Copyright ? 2005 by Khamaganova, Oshorova.     

Structure and Properties of Solid Solutions in the System YBaCuFeO<Subscript>5</Subscript>-YBaCuCoO<Subscript>5</Subscript>

The crystal structure parameters of solid solutions YBaCuFe_{1 − x} Co_xO₅ (0 ≤ x ≤ 1) were determined, and their thermal stability, thermal expansion, conductance, thermoelectromotive force, dielectric properties, and magnetic sensibility were studied.__________Translated from Zhurnal Prikladnoi Khimii, Vol. 78, No. 5, 2005, pp. 716–720.Original Russian Text Copyright © 2005 by Chizhova, Klyndyuk, Bashkirov, Petrov, Yanushkevich.     

Temperature dependence of the polarization resistance of the O<Subscript>2</Subscript>,Au/La<Subscript>0.88</Subscript>Sr<Subscript>0.12</Subscript>Ga<Subscript>0.82</Subscript>Mg<Subscript>0.18</Subscript>O<Subscript>2.85</Subscript> electrode system

The impedance of a porous gold electrode in contact with solid electrolyte La_0.88Sr_0.12Ga_0.82Mg_0.18O_2.85 and the effect of the manufacture conditions on its polarization resistance are studied at 600–800°C in air. The overall oxygen reaction rate on a gold electrode is described as the sum of two partial constituents, namely, the oxygen exchange at the gas/electrolyte interface at the gold/gas/electrolyte triple-phased boundary.Translated from Elektrokhimiya, Vol. 41, No. 2, 2005, pp. 190–197.Original Russian Text Copyright © 2005 by Shkerin, Sokolova, Khlupin, Beresnev.This revised version was published online in April 2005 with corrections to the article note and article title and cover date.     

Analytical characteristics of electrodes selective for cationic phospholipid–Ba <Superscript>2+</Superscript> complexes

The interaction between organic cations of phospholipids products of their hydrolysis with the PMo₁₂O ₄₀ ^3– heteropoly anion was studied. A procedure was proposed for the direct potentiometric determination of phospholipids using ion-selective electrodes bearing poorly soluble ion pairs formed by the complexes of lecithin or ethanolamine glycerophosphate and Ba²⁺ and PMo₁₂O ₄₀ ^3– heteropoly counter anion as ionophores. The procedure is simple, rapid, sufficiently sensitive, and selective.Translated from Zhurnal Analiticheskoi Khimii, Vol. 60, No. 1, 2005, pp. 60–63.Original Russian Text Copyright © 2005 by Golovei, Tkach.     

Synthesis and X-ray diffraction analysis of {Perchlorato-bis[benzimidazole-2-<Emphasis Type="Italic">N</Emphasis>-(4-methoxyphenyl)carbothioamidato]copper(III)} hydroperchlorate

Conditions for the formation of the complex [CuL₂(ClO₄)] · HClO₄ (where L is the deprotonated molecule of benzimidazole-2-N-(4-methoxyphenyl)carbothioamide) are determined and its crystal and molecular structures are studied by X-ray diffraction analysis.Translated from Koordinatsionnaya Khimiya, Vol. 31, No. 1, 2005, pp. 43–47.Original Russian Text Copyright © 2005 by Panasyuk, Ranskii, Aliev.     

N,N′-Bis(trimethylsilylmethyl)thiocarbamide and N,N′-Bis(trimethylsilylmethyl)-λ6-thiocarbamide S,S-Dioxide

N,N′-Bis(trimethylsilylmethyl)-λ⁶-thiocarbamide S,S-dioxide was synthesized by oxidation of N,N′-bis(trimethylsilylmethyl)thiocarbamide with hydrogen peroxide. The synthesized dioxide is a less active reducing agent than previously studied S,S-dioxides of organosilicon thiocarbamides in which the silicon atom is separated from the thiocarbamide fragment by a -CH₂CH₂CH₂- bridge.__________Translated from Zhurnal Obshchei Khimii, Vol. 75, No. 6, 2005, pp. 912–914.Original Russian Text Copyright © 2005 by Vlasova, Grigor’eva, Voronkov.     

Polythermic Section B<Subscript>4</Subscript>C-LaB<Subscript>6</Subscript> in the Ternary System La-B-C

The interaction was studied and the polythermic section B₄C-LaB₆ was constructed for the ternary system La-B-C described by a eutectic phase diagram.__________Translated from Zhurnal Prikladnoi Khimii, Vol. 78, No. 2, 2005, pp. 338–340.Original Russian Text Copyright © 2005 by Ordan’yan, Yurchenko, Vikhman.     

A Diffusion-Kinetic Model for Radiation-Chemical Transformations of Oxalic Acid and Oxalate Ions in Aqueous Solutions

A diffusion-kinetic model for the radiation-chemical degradation of oxalic acid and oxalates in aqueous solutions was developed. The model adequately describes published data on the formation of H₂, H₂O₂, and CO₂ over wide ranges of acid concentrations and pH values.__________Translated from Khimiya Vysokikh Energii, Vol. 39, No. 4, 2005, pp. 250–254.Original Russian Text Copyright © 2005 by Gordeev, Ershov, Kosareva.     

Electrotransport Properties of Ceramics Based on Bi<Subscript>4</Subscript>V<Subscript>2 − <Emphasis Type="Italic">x</Emphasis></Subscript>Fe<Subscript>x</Subscript>O<Subscript>11 − <Emphasis Type="Italic">x</Emphasis></Subscript>

Conditions for the formation of single-phase compounds in the synthesis of solid solutions Bi₄V_{2 − x} Fe_xO_{11 − x} are studied. The sequence of phase transitions is determined. Parameters of unit cells of solid solutions are determined. The net conductance as a function of temperature and composition is studied.__________Translated from Elektrokhimiya, Vol. 41, No. 5, 2005, pp. 607–609.Original Russian Text Copyright © 2005 by Emel’yanova, Buyanova, Zhukovskii.