Synthesis and characterization of the pseudo-hexagonal hollandites ALi 2Ru6O12 (A=Na, K)

M. L. Foo, T. He, Q. Huang, H. W. Zandbergen, T. Siegrist, G. Lawes, A. P. Ramirez, R. J. Cava

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The crystal structures, synthesis and physical properties of ruthenium hollandites ALi2Ru6O12 (A=Na, K) with a new pseudo-hexagonal structure type are described. Analogous to tetragonal hollandites, the framework is made of MO6 octahedra in double chains that share corner oxygens with each other to create interstitial tunnels. The tunnels are either hexagonal or triangular in cross-section. Magnetic susceptibilities, low temperature specific heat, and electrical resistivities are reported. The data indicate that these materials are normal, low density of states metals. This new structure type can be extended from A=Group I to A=Group II ions with the synthesis of CaLi2Ru6O12 and SrLi2Ru6O12.

Original languageEnglish (US)
Pages (from-to)941-948
Number of pages8
JournalJournal of Solid State Chemistry
Issue number3
StatePublished - Mar 2006

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


  • Electron diffraction
  • Hollandites
  • Magnetic susceptibility
  • Neutron diffraction
  • Pseudo-hexagonal
  • Ruthenates
  • Single-crystal X-ray diffraction
  • Specific heat


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