Crystal structure of Nd2-x Mx Ru2 O7-y (M=Cu, Ag) pyrochlores by X-ray powder diffraction

G. Kimmel, H. On, D. Itzhak, J. Hormadaly

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The crystal structures of ruthenium oxides with the general formula Nd2-x Mx Ru2 O7-y, where M is Cu or Ag, 0x0.25, were investigated. All compounds that were prepared exhibit the pyrochlore structure with a cubic unit cell. The compounds were characterized by X-ray powder diffraction, and single-phase structures were found for Nd2-x Cux Ru2 O7-y, x=0.1, 0.2, 0.25, and for Nd2-x Agx Ru2 O7-y, x=0.1, 0.15, 0.2. The relative metal concentrations were verified by EDS. The cell parameters were determined by advanced peak-position analysis and calibrated by a Si internal standard. Atomic positions and oxygen occupancies where refined by the Rietveld method. It was found that the cell-size modifications agree with the relations between ionic sizes.

Original languageEnglish
Pages (from-to)231-235
Number of pages5
JournalPowder Diffraction
Volume22
Issue number3
DOIs
StatePublished - 3 Sep 2007

ASJC Scopus subject areas

  • Radiation
  • Materials Science (all)
  • Instrumentation
  • Condensed Matter Physics

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