Synthesis, crystal structure, and physical properties of Sr0.93 (Si(x)Nb(1-x)) Nb10O19 (x = 0.87)

J. Tortelier, T. J. Emge, G. Veith, M. Greenblatt

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We present here the synthesis, crystal structure, and physical properties of a reduced niobium oxide Sr0.93(Si(x)Nb(1-x))Nb10O19 (x = 0.87). Its structure was determined on single crystal by X-ray diffraction in the space group R3̄ (a(h) = 7.843(1), C(h) = 42.26(2) Å, V(h) = 2251.3(9) Å3, and Z = 6). The compound is isostructural to Na(Si(x)Nb(1-x)) Nb10O19 (x ≃ 0.75) and exhibits discrete [Nb6O12] clusters, Nb2O10 dimers, NbO6 octahedra, SrO12 cubo-octahedra, and SiO4 tetrahedra. The compound is insulating with a room-temperature resistivity ˜50 Ω cm. The magnetic susceptibility data yields μ(eff) = 3.16 μ(B)/Nb, which is consistent with a 15-electron [Nb6O12] cluster, with Nb(IV) in the dimers and Nb(V) in the isolated NbO6 octahedra. (C) 2000 Academic Press.

Original languageEnglish (US)
Pages (from-to)540-545
Number of pages6
JournalJournal of Solid State Chemistry
Issue number2
StatePublished - Jan 1 2000


All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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