C 91 Crystal Structure and Spectroscopic Properties of AVO2SO4 (A = K, Rb) Compounds / A. P. Tyutyunnik, V. G. Zubkov, I. F. Berger, V. N. Krasil'nikov, L. A. Perelyaeva, I. V. Baklanova // Russian Journal of Inorganic Chemistry. - 2007. - Vol. 52, № 9. - P1424-1429 : il. - Bibliogr. : p. 1429 (20 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): КРИСТАЛЛИЧЕСКАЯ СТРУКТУРА -- ВАНАДАТЫ Аннотация: The crystal structure of alkali-metal dioxovanadium(V) sulfates AVO2SO4, where A is K or Rb, has been determined based on a combination of neutron and X-ray diffraction data. The compounds are isostructural and have an orthorhombic lattice (space group P212121, Z = 4) with unit cell parameters a = 11.1004(2) and 10.8193(1) Å; b = 8.2626(2) and 8.9042(1) Å; c = 5.4772(1) and 5.5722(1) Å, respectively. The structures are of the chain type. Zigzag chains are formed by vertex-sharing VO6 octahedra. Sulfate groups SO4 link neighboring chains and form a spatial framework with cavities accommodating alkali-metal atoms with CN = 9 (K) and 8 (Rb). IR and Raman spectroscopy data are reported Полный текст |