New layered oxide-fluoride perovskites: KNaNbOF5 and KNaMO2F4 (M = Mo6+, W6+)

Rachelle Ann F. Pinlac, Charlotte L. Stern, Kenneth R. Poeppelmeier

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

KNaNbOF5 and KNaMO2F4 (M = Mo6+, W6+), three new layered oxide-fluoride perovskites with the general formula ABB'X6, form from the combination of a secondorder Jahn-Teller d0 transition metal and an alkali metal (Na+) on the B-site. Alternating layers of cation vacancies and K+ cations on the A-site complete the structure. The K+ cations are found in the A-site layer where the fluoride ions are located. The A-site is vacant in the adjacent A-site layer where the axial oxides are located. This unusual layered arrangement of unoccupied A-sites and under bonded oxygen has not been observed previously although many perovskite-related structures are known.

Original languageEnglish
Pages (from-to)3-14
Number of pages12
JournalCrystals
Volume1
Issue number1
DOIs
Publication statusPublished - Mar 18 2011

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Keywords

  • Hydrothermal synthesis
  • Oxide-fluorides
  • Perovskites

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Inorganic Chemistry

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