A new approach to synthesis of layered fluorites containing molecular anions: Synthesis of Ln(2)O(2)CO(3), K(LnO)CO3, and Ln(2)O(2)CrO(4) via metathesis reactions

Dmitri O. Charkin, Roman O. Grischenko, Arman A. Sadybekov, Richard J. Goff, Philip Lightfoot

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

A new synthetic approach is suggested for preparation of layered rare-earth oxide compounds containing [Ln(2)O(2)] slices and molecular anion sheets (CO32-, SO42-, and CrO42-). It is based on exchange reactions of rare-earth oxychlorides, [Ln(2)O(2)]Cl-2, and alkali carbonates, sulfates, or chromates. Five new rare-earth oxychromates [Ln(2)O(2)]CrO4 (Ln = Pr-Gd) have been prepared which adopt a new, probably layered, structure type. In addition, significantly easier and more efficient synthetic pathways were found to the known compounds [Ln(2)O(2)]K-2(CO3)(2) and [La2O2]CrO4. The structure of the latter compound has been determined from neutron powder diffraction data. Factors affecting reaction pathways and products are discussed, as well as prospects for applying the approach to more complex layered compounds.

Original languageEnglish
Pages (from-to)3065-3071
Number of pages7
JournalInorganic Chemistry
Volume47
DOIs
Publication statusPublished - 21 Apr 2008

Keywords

  • RUDDLESDEN-POPPER
  • CRYSTAL-STRUCTURE
  • BISMUTH OXYHALIDES
  • PEROVSKITE OXIDES
  • SERIES
  • SULFATES
  • MEMBERS
  • PHASES
  • SR
  • BA

Fingerprint

Dive into the research topics of 'A new approach to synthesis of layered fluorites containing molecular anions: Synthesis of Ln(2)O(2)CO(3), K(LnO)CO3, and Ln(2)O(2)CrO(4) via metathesis reactions'. Together they form a unique fingerprint.

Cite this