Synthesis, proton exchange, and topochemical dehydration of new Ruddlesden-Popper tantalates and titanotantalates

Raymond E. Schaak, Thomas E. Mallouk

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42 Scopus citations

Abstract

Several new ion-exchangeable Ruddlesden-Popper phases were synthesized and characterized. K2CaNaTa3O10, which crystallizes in space group I4/mmm and has lattice constants of a = 3.9185(1) and c = 29.519(2), is the first all-tantalum(V) analogue of K2La2Ti3O10. K2Ca2Ta2TiO10 immediately hydrates in air to K2Ca2Ta2TiO10 · 0.8H2O, which belongs to space group P4/mmm with a = 3.8903(1) and c = 16.709(1). K2SrLaTi2-TaO10 · 2H2O, which contains a large perovskite impurity, also crystallizes in space group P4/mmm and has lattice constants of a = 3.9028(3) and c = 16.896(2). All of the phases undergo ion exchange in dilute acid to form the corresponding solid acids. The solid acids topochemically dehydrate around 500°C to form A-site defective cubic perovskites. (C) 2000 Acdemic Press.

Original languageEnglish (US)
Pages (from-to)46-54
Number of pages9
JournalJournal of Solid State Chemistry
Volume155
Issue number1
DOIs
StatePublished - Jan 1 2000

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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