Transforming n=1 members of the Ruddlesden-Popper phases to a n=3 member through metathesis: Synthesis of a new layered perovskite, Ca2La 2CuTi2O10

T. Sivakumar, S. E. Lofland, K. V. Ramanujachary, K. Ramesha, G. N. Subbanna, J. Gopalakrishnan

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Abstract

We report the formation of a new n=3 Ruddlesden-Popper (R-P) layered perovskite oxide, Ca2La2CuTi2O10 (I), in the metathesis reaction between NaLaTiO4 and Ca 2CuO2Cl2 (n=1 R-P phases) at 700°C in air. Rietveld refinement of powder XRD data shows that I is isostructural with Sr4Ti3O10 (space group I4/mmm; a=3.8837(5), c=27.727(6)Å), consisting of triple perovskite CuTi2O 10 sheets wherein Cu and Ti are ordered at the central and terminal octahedral sites, respectively. Magnetization data provide support for the presence of strong antiferromagnetically coupled CuO2 sheets in the structure. I is metastable decomposing at higher temperatures (∼950°C) to a mixture of perovskite-like CaLa2CuTi2O9 and CaO. Interestingly, the reaction between NaLaTiO4 and Sr 2CuO2Cl2 follows a different metathesis route, 2NaLaTiO4+Sr2CuO2Cl2→La 2CuO4+2SrTiO3+2NaCl, revealing multiplicity of reaction pathways for solid-state metathesis reactions.

Original languageEnglish (US)
Pages (from-to)2635-2638
Number of pages4
JournalJournal of Solid State Chemistry
Volume177
Issue number7
DOIs
StatePublished - Jul 1 2004

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

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