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1.
Yu. A. Titov N. S. Slobodyanik Ya. A. Kraevskaya N. N. Belyavina V. Ya. Markiv 《Theoretical and Experimental Chemistry》2007,43(6):380-384
The synthesis of three-layered titanates BaLn2Ti3O10 (Ln = La, Nd, Sm) in systems with coprecipitated hydroxocarbonates was studied. It was established that they are formed through
an intermediate phase with a defective perovskite structure followed by its transformation into the three-layered structure
by the ordering of vacancies and rare-earth element and barium atoms and subdivision into three-layered blocks.
__________
Translated from Teoreticheskaya i éksperimental’naya Khimiya, Vol. 43, No. 6, pp. 349–353, November–December, 2007. 相似文献
2.
Nataliia Yu. Strutynska Marina A. Bondarenko Ivan V. Ogorodnyk Igor V. Zatovsky Nikolay S. Slobodyanik Vyacheslav N. Baumer Anna N. Puzan 《Crystal Research and Technology》2015,50(7):549-555
The interaction in the molten system Rb2O‐P2O5‐TiO2‐NiO was investigated at different molar ratios Rb/P = 0.5‐1.3, fixed Ti/P = 0.15, Ti/Ni = 1.0 at temperature range 1073–953 K. The conditions of formation of complex phosphates RbTi2(PO4)3, Rb2Ni0.5Ti1.5(PO4)3 and RbNiPO4 have been determined. The new phosphate Rb2Ni0.5Ti1.5(PO4)3 (space group P213, a = 9.9386(2) Å) has been obtained and investigated by the single crystal X‐ray diffraction and FTIR‐spectroscopy. It has langbeinite‐like structure, that is built up from mixed (Ni/Ti)O6‐octahedra and РО4‐tetrahedra. Rubidium atoms are located in closed cavities of 3D‐framework. 相似文献
3.
Lesnyak V. V. Stratiichuk D. A. Slobodyanik N. S. Sudavtsova V. S. 《Russian Journal of Applied Chemistry》2001,74(6):912-915
Synthesis of transition metal oxides MO2 (MI
V = Mo, W, or Nb) and V6O1
3 in alkali chloride melts and their crystallographic characteristics are described. The advantages of the proposed technology are demonstrated. The thermodynamic parameters of the proposed reactions are calculated. 相似文献
4.
Igor V. Zatovsky Nikolay S. Slobodyanik V. I. Ivanenko Yu. S. Oseledchik V. Yu. Letsenko Tetiana I. Ushchapivska 《Crystal Research and Technology》2016,51(2):178-182
Solid solutions KTi1‐XHfXOPO4 (х = 0.008 – 0.107) possessing the KTiOPO4 structure, have been synthesized in molten system K2O‐P2O5‐TiO2‐HfF4. The crystal growth experiment of Hf‐doped KTP crystal has been reported. The X‐ray powder diffraction data and chemical analysis are also presented. It has been shown that KTiOPO4 crystal structure slightly changes when Hf incorporates into the framework. Transmission/absorption spectra of KTi0.974Hf0.026OPO4 crystals have been recorded. The incorporation of Hf ions shifts the optical absorption edge in the UV‐visible spectrum towards the long‐wavelength region with absorption near 387 nm. 相似文献
5.
Nataliya Yu. Strutynska Vyacheslav N. Baumer Igor V. Zatovsky Artem A. Babaryk Nikolay S. Slobodyanik 《Acta Crystallographica. Section C, Structural Chemistry》2010,66(4):i39-i41
The complex phosphate tricaesium calcium iron bis(diphosphate), Cs3CaFe(P2O7)2, has been prepared by the flux method. Isolated [FeO5] and [CaO6] polyhedra are linked by two types of P2O7 groups into a three‐dimensional framework. The latter is penetrated by hexagonal channels along the a axis where three Cs atoms are located. Calculations of caesium Voronoi–Dirichlet polyhedra give coordination schemes for the three Cs atoms as [8 + 3], [9 + 1] and [9 + 4]. The structure includes features of both two‐ and three‐dimensional frameworks of caesium double pyrophosphates. 相似文献
6.
Yatsimirsky V. K. Boldyreva N. A. Lisnyak V. V. Slobodyanik N. S. 《Journal of Thermal Analysis and Calorimetry》2000,62(2):551-554
The thermal stability of sample Mo(PO3)3 that is the initial material for novel catalysts for carbonmonoxide oxidation has been studied. It has been concluded that
molybdenum(III) methaphosphate is stable up to 435°C. Processes of partial oxidation and layering of specimens are determined.
Novel material based on partial oxidized Mo(PO3)3 gives significant rise of the carbon oxidation rate. The molybdenum(III) metaphosphate is of a definite interest in view
of its application in practice as initial material for new catalysts row formation with different content of Mo(PO3)3 and MoOPO4 layers.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
7.
Igor V. Zatovsky Nataliya Yu. Strutynska Nikolay S. Slobodyanik Oleg V. Shishkin 《Journal of solid state chemistry》2011,184(3):705-711
The crystallization of complex phosphates from the melts of Cs2O-P2O5-CaO-MIII2O3 (MIII—Al, Fe, Cr) systems have been investigated at fixed value Cs/P molar ratios equal to 0.7, 1.0 and 1.3 and Са/Р=0.2 and Ca/МIII=1. The fields of crystallization of CsCaP3O9, β-Ca2P2O7, Cs2CaP2O7, Cs3CaFe(P2O7)2, Ca9MIII(PO4)7 (MIII—Fe, Cr), Cs0.63Ca9.63Fe0.37(PO4)7 and CsCa10(PO4)7 were determined. Obtained phosphates were investigated using powder X-ray diffraction and FTIR spectroscopy. Novel whitlockite-related phases CsCa10(PO4)7 and Cs0.63Ca9.63Fe0.37(PO4)7 have been characterized by single crystal X-ray diffraction: space group R3c, a=10.5536(5) and 10.5221(4) Å, с=37.2283(19) and 37.2405(17) Å, respectively. 相似文献
8.
V. I. Ivanenko I. V. Zatovsky N. S. Slobodyanik P. G. Nagornyi V. N. Baumer 《Crystal Research and Technology》2008,43(4):355-361
Zirconium‐doped KTiOPO4 (KTP) crystals were grown using a high temperature flux method in the K2O‐P2O5‐TiO2‐ZrF4 system. The dopant content in the single crystals with general composition KTi1‐xZrxOPO4 (where x = 0 – 0.026) strongly depends on zirconium concentration in the homogeneous melts. AES‐ICP method and X‐ray fluorescence analysis were used to determine the composition of the obtained crystals. Phase analyses of the products were performed using the powder XRD. The structures of KTiOPO4 containing different quantities of Zr were refined on the basis of single crystal XRD data. Applying ZrF4 precursor for zirconium injection into the flux allowed growing the zirconium‐doped KTP crystals at 930–750°C. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献
9.
N. S. Slobodyanik Yu. A. Titov V. V. Chumak 《Theoretical and Experimental Chemistry》2005,41(1):53-57
We have determined the characteristic features of the formation of five-layer perovskites Ca5– x
SrxTiNb4O17 (x=0–5) from systems of coprecipitated hydroxocarbonates. We have established that the sequence of formation for their crystal structure depends on the composition and nature of the products obtained, and is different for the individual compounds Ca5TiNb4O17, Sr5TiNb4O17, and the phases Ca5–x
SrxTiNb4O17 (x=1–4).__________Translated from Teoreticheskaya i Éksperimentalnaya Khimiya, Vol. 41, No. 1, pp. 50–54, January–February, 2005. 相似文献
10.
I. V. Zatovskii A. A. Babarik N. S. Slobodyanik 《Russian Journal of Applied Chemistry》2006,79(11):1765-1768
A series of heterovalence-substituted analogs of KTiOPO4 of the general composition K2MIIIMV(OPO4)2 (MIII = Cr, Fe, In; MV = Nb, Ta) were synthesized by crystallization from melts and by solid-phase reactions. Influence of the nature of tri-and pentavalent metals on the conditions of preparation and on the features of phase formation of substituted mixed phosphates was examined. The compounds obtained were characterized by X-ray diffraction analysis and by diffuse reflection spectroscopy. 相似文献