Site and oxidation-state specificity yielding dimensional control in perovskite ruthenates

Job T. Rijssenbeek, Sylvie Malo, Vincent Caignaert, Kenneth R. Poeppelmeier

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Sr3CaRu2O9, a new 2:1 B-site ordered perovskite ruthenate, was synthesized and its structure determined based on powder X-ray, neutron and electron diffraction data. It is composed of one layer of CaO6 alternating with two layers of RuO6 perpendicular to the [111] axis of the cubic perovskite structure. The ordering leads to a {...-Ru-Ru-Ca-...} repeat unit along each of the pseudocubic directions. Sr3CaRu2O9 is the first example of this structure-type to include a majority metal with d electrons (Ru(V), d3). Three-dimensional Sr3CaRu2O9 can be transformed to the layered Ruddlesden-Popper phase Sr1.5Ca0.5RuO4 (i.e., Sr3CaRu2O8) by reduction at 1200 °C in flowing argon. The original structure can be restored by oxidation of Sr1.5Ca0.5RuO4 at 1000 °C in flowing oxygen. This remarkable transformation highlights the structural versatility afforded by the combination of ruthenium and calcium.

Original languageEnglish
Pages (from-to)2090-2091
Number of pages2
JournalJournal of the American Chemical Society
Volume124
Issue number10
DOIs
Publication statusPublished - Mar 13 2002

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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