Novel protonated and hydrated n = 1 Ruddlesden-Popper phases, H xNa1-xLaTiO4·yH2O, formed by ion-exchange/intercalation reaction

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Abstract

New derivatives of layered perovskite compounds with H3O + ions, H+ ions and water molecules in the interlayer, HxNa1-xLaTiO4·yH2O, were successfully synthesized by an ion-exchange/intercalation reaction with dilute HCl solution, using an n=1 member of Ruddlesden-Popper phase, NaLaTiO 4. Powder X-ray diffraction revealed that the layered structure changed from space group P4/nmm with a=3.776(1) and c=13.028(5)Å to I4/mmm with a=3.7533(3) and c=28.103(4)Å after the ion-exchange/intercalation reaction at pH 5. The change of space group indicates that the perovskite layers are transformed from staggered to an eclipsed configuration through the ion-exchange/intercalation reaction. Thermogravimetric analysis and high-temperature powder X-ray diffraction suggested the existence of the secondary hydrated phase by dehydrating HxNa1-xLaTiO 4·yH2O at 100°C.

Original languageEnglish
Pages (from-to)811-818
Number of pages8
JournalJournal of Solid State Chemistry
Volume178
Issue number3
DOIs
Publication statusPublished - Mar 2005

Keywords

  • Hydration
  • Intercalation
  • Ion-exchange
  • Layered perovskite
  • Ruddlesden-Popper phase

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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