Structure and elementary properties of the new Ir hollandite Rb 0.17IrO2

Leslie M. Schoop, Jason W. Krizan, Quinn D. Gibson, R. J. Cava

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6 Scopus citations


We report the synthesis and structural characterization of the new Ir holladite, Rb0.17IrO2. Rb0.17IrO2 crystallizes in the tetragonal hollandite structure. In contrast to the previously reported monoclinic Ir hollandite K0.25IrO2, we do not observe a difference in Ir-O bond lengths in Rb0.17IrO 2 and thus find Ir in an average oxidation state of + 3.83. We also report and compare the electronic and magnetic properties of Rb 0.17IrO2 and K0.25IrO2, finding that they are both metallic and Pauli paramagnets further supporting that the electrons are delocalized in the Ir 5d states.

Original languageEnglish (US)
Pages (from-to)37-41
Number of pages5
JournalJournal of Solid State Chemistry
StatePublished - 2014

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


  • Hollandites
  • Iridates
  • RbIrO


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