The h-Sb x WO 3+2x Oxygen Excess Antimony Tungsten Bronze

Fabian O. von Rohr, Alice Ryser, Huiwen Ji, Karoline Stolze, Jing Tao, Jessica J. Frick, Greta R. Patzke, Robert J. Cava

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

We describe the previously unreported oxygen excess hexagonal antimony tungsten bronze is reported, with a composition of Sb 0.5 W 3 O 10 , in the following denoted as h-Sb x WO 3+2x with x=0.167, to demonstrate its analogy to classical A x WO 3 tungsten bronzes. This compound forms in a relatively narrow temperature range between 580 °C<T<620 °C. It was obtained as a dark-blue polycrystalline powder, and as thin, needle-shaped, blue single crystals. h-Sb x WO 3+2x crystallizes in the hexagonal space group P6/mmm with the cell parameters a=7.4369(4) Å and c=3.7800(2) Å. The antimony and excess oxygen occupy the hexagonal channels within the network of corner-sharing WO 6 octahedra. h-Sb x WO 3+2x has a resistivity of ρ 300 K ≈1.28 mΩ cm at room temperature, with little if any temperature-dependence on cooling. DFT calculations on a simplified model for this compound find a metallic-like electronic structure with the Fermi level falling within rather flat bands, especially around the Γ point.

Original languageEnglish (US)
Pages (from-to)2082-2088
Number of pages7
JournalChemistry - A European Journal
Volume25
Issue number8
DOIs
StatePublished - Feb 6 2019

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Organic Chemistry

Keywords

  • antimony
  • bronze
  • hexagonal bipyramids
  • metallic oxide
  • tungsten

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