Nikolai Slobodyanik

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Solid solutions KBi(MoO<sub>4</sub>)<sub>2</sub>:Eu<sup>3+</sup> have been prepared by solid state synthesis and characterized by powder X-ray diffraction. The structure of KBi(MoO<sub>4</sub>)<sub>2</sub> represents 3D framework built up from MoO<sub>4</sub> and BiO<sub>8</sub> species, while potassium cation has been found to share one position with(More)
The conditions of synthesis and luminescence characteristics of composites Al<sub>2</sub>O<sub>3</sub>:Cr<sup>3+</sup>/NaAl(MoO<sub>4</sub>)<sub>2</sub>:Cr<sup>3+</sup> obtained from molybdate high-temperature solutions have been studied. The influence of the impurity Cr<sup>3+</sup> ions on crystallization regions in the molten system Na-Al-Mo-O has been(More)
The synthetic conditions of BiVO<sub>4</sub>:Mo crystallization in the molten salts of K-Bi-V-Mo-O have been studied. The compound crystallizes in the monoclinic system, space group I2/a, with unit cell parameters a = 5.1153(3), b = 11.7012(1), c = 5.1878(1) &#x212B;, &#x03B2; = 90.24(1)&#x00B0;, Z = 4 representing scheelite-related structure. The formula(More)
The interaction in the systems M<sup>II</sup><sub>2</sub>P<sub>4</sub>O<sub>12</sub>-M<sup>I</sup>Cl (M<sup>I</sup>NO<sub>3</sub>) (M<sup>I</sup> - Li, Na, K; M<sup>II</sup> - Co, Ni) was investigated in temperature range 673-1073 K. Obtained crystalline phases have been investigated using X-ray powder diffraction, electronic, Raman and FTIR spectroscopy(More)
The Ca<sub>9</sub>Y(VO<sub>4</sub>)<sub>7</sub>-x(PO<sub>4</sub>)<sub>x</sub> (X=0-7) solid solution samples of synthesized ceramics and single crystals grown by the Czochralski method were characterized by powder and single crystal X-ray diffraction and optical spectroscopy. The microhardness Hv and fracture toughness K<sub>1c</sub> of solid solution(More)
The results of a comparative study of amorphous (Na, CO<sub>3</sub>)- and (K, CO<sub>3</sub>)-containing apatites by TPM MS analysis, FTIR, XRD, SEM and EPR are presented. Annealing of amorphous apatite at temperatures below 400&#x00B0;C does not lead to changing of nanoparticle shape and size and an extent of its crystallinity. A significant difference in(More)
Detonation-produced hydroxyapatite coatings were studied by scanning electron microscopy (SEM), X-ray powder diffraction (XRD), Raman spectroscopy, and electron paramagnetic resonance (EPR) spectroscopy. The source material for detonation spraying was a B-type carbonated hydroxyapatite powder. The coatings consisted of tetracalcium phosphate and apatite.(More)
The vitreous samples of M<sup>I</sup><sub>x</sub>Na<sub>4-x</sub>CoFe(PO<sub>4</sub>)<sub>3</sub> (x = 0, 0.2 and 1.0, M<sup>I</sup> - Li, K) composition were prepared by melt method. Formation of Nasicon-related crystalline samples was caused by the annealing at 600 &#x00B0;C. The cell parameters calculation showed that its evolution along two series(More)
The main crystallization trends of complex oxide compounds of yttrium and calcium from potassium phosphate-molybdate melts have been studied. The regions of formation K<sub>3</sub>Y(PO<sub>4</sub>)<sub>2</sub>, YPO<sub>4</sub>, KCaY(PO<sub>4</sub>)<sub>2</sub> and K<sub>2</sub>CaP<sub>2</sub>O<sub>7</sub> from high-temperature solutions of K-Ca-Y-P-Mo-O(More)
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