The lithium- And sodium-enhanced transformation of Ba-exchanged zeolite LTA into celsian phase

V. Dondur, R. Dimitrijević, A. Kremenović, Lj Damjanović, N. Romčević, Slobodan I Macura

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15 Scopus citations

Abstract

The Li+- and Na+-doped hexacelsians (HC) synthesized from Ba-LTA synthetic zeolite as precursors were used for preparation of monoclinic celsians (MC). The doped pure MC and mixture HC/MC species were obtained by thermally induced polymorphous transformation at 1200 C. Synthesized-doped MC have been characterized by X-ray powder diffraction and spectroscopic (infrared, Raman and 29Si magic angle spinning nuclear magnetic resonance) methods. The obtained results suggest that in all investigated samples Na+ or Li+ dopants were incorporated in MC crystal structures during thermal transformation of a zeolite. It has been shown that HC → MC transformation depends on molar fractions of alkali cations. These findings combined with used temperature/time conditions could help in optimization of MC synthesis route.

Original languageEnglish (US)
Pages (from-to)2827-2832
Number of pages6
JournalJournal of Physics and Chemistry of Solids
Volume69
Issue number11
DOIs
StatePublished - Nov 2008

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Keywords

  • Ceramics
  • Chemical synthesis
  • Crystal structure
  • Phase transitions

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Chemistry(all)
  • Materials Science(all)

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