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Träfflista för sökning "WFRF:(Skripkin M.) srt2:(2010-2012)"

Sökning: WFRF:(Skripkin M.) > (2010-2012)

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1.
  • Tyutyunnik, A. P., et al. (författare)
  • CRYSTAL STRUCTURE AND VIBRATIONAL SPECTRA OF M[VO(2)(SeO(4))(H(2)O)(2)]center dot H(2)O (M = K, Rb, NH(4))
  • 2011
  • Ingår i: Journal of Structural Chemistry. - 0022-4766 .- 1573-8779. ; 52:2, s. 350-357
  • Tidskriftsartikel (refereegranskat)abstract
    • By the hydration of MVO(SeO(4))(2) with saturated water vapors at room temperature a series of isostructural complex compounds of vanadium(V) of the composition M[VO(2)(SeO(4))(H(2)O)(2)]center dot H(2)O (K, Rb, NH(4)) are synthesized and their physicochemical properties are studied. Based on the X-ray and neutron diffraction data, it is found that their crystal structure is composed of VO(6) octahedra linked in infinite chains by bridging SeO(4) tetrahedra. Each of the VO(6) octahedra has two short terminal V-O bonds forming a bent dioxovanadium group VO(2)(+). Two water molecules are coordinated by vanadium and one molecule is out of the first coordination sphere in the interchain space. The vibrational spectra of the studied compounds are completely consistent with their structural features.
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2.
  • Vybornov, A., et al. (författare)
  • Chronological problems with neolithization of the northern caspian sea area and the forest-steppe povolzhye region
  • 2012
  • Ingår i: Radiocarbon. - 0033-8222 .- 1945-5755. ; 54:3-4, s. 795-799
  • Tidskriftsartikel (refereegranskat)abstract
    • Steppe and forest-steppe areas of the Povolzhye area (Caucasus and central Asia) bear much interest for the Neolithic in connection with the productive economy of the region at the time. Recent data have allowed correction of the region's chronology. A number of C-14 dates denote the existence of the Neolithic in this territory as early as the 5th to 6th millennium BP. However, some questions are still under debate and require further data to clarify.
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