Effect of explicit cationic size and valence constraints on the phase stability of 1

2 B-site-ordered perovskite ruthenates

Job T. Rijssenbeek, Takashi Saito, Sylvie Malo, Masaki Azuma, Mikio Takano, Kenneth R Poeppelmeier

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The related parameters of cation size and valence that control the crystallization of Sr3CaRu2O9 into a 1:2 B-site-ordered perovskite structure were explored by cationic substitution at the strontium and calcium sites and by the application of high pressure. At ambient pressures, Sr3MRu2O9 stoichiometries yield multiphasic mixtures for M = Ni2+, Mg2+, and Y 3+, whereas pseudocubic perovskites result for M = Cu2+ and Zn2+. For A-site substitutions, an ordered perovskite structure results for Sr3-xCaxCaRu2O9, with 0 ≤ x ≤ 1.5. In contrast, Ba2+ substitution for Sr2+ is accompanied by a phase change to a hexagonal BaTiO3 structure type. At high pressures and temperatures, a 1:2 B-site-ordered perovskite structure is stabilized for Sr3-xBaxCaRu2O 9, with 0 ≤ x ≤ 3. The scarcity of B-site-ordered perovskite ruthenates at ambient pressure and the metastable nature of the high-pressure phases underscore the strict size and valence requirements that must be met by the constituent cations to achieve these uncommon ordered structures.

Original languageEnglish
Pages (from-to)675-681
Number of pages7
JournalJournal of the American Chemical Society
Volume127
Issue number2
DOIs
Publication statusPublished - Jan 19 2005

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Phase stability
Perovskite
Pressure
Substitution reactions
Cations
Positive ions
Strontium
Crystallization
Stoichiometry
Calcium
perovskite
Temperature

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Effect of explicit cationic size and valence constraints on the phase stability of 1 : 2 B-site-ordered perovskite ruthenates. / Rijssenbeek, Job T.; Saito, Takashi; Malo, Sylvie; Azuma, Masaki; Takano, Mikio; Poeppelmeier, Kenneth R.

In: Journal of the American Chemical Society, Vol. 127, No. 2, 19.01.2005, p. 675-681.

Research output: Contribution to journalArticle

Rijssenbeek, Job T. ; Saito, Takashi ; Malo, Sylvie ; Azuma, Masaki ; Takano, Mikio ; Poeppelmeier, Kenneth R. / Effect of explicit cationic size and valence constraints on the phase stability of 1 : 2 B-site-ordered perovskite ruthenates. In: Journal of the American Chemical Society. 2005 ; Vol. 127, No. 2. pp. 675-681.
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