Synthesis and magnetic properties of β-KVOF3

Martin D. Donakowski, Hongcheng Lu, Romain Gautier, Rana Saha, A. Sundaresan, Kenneth R. Poeppelmeier

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11 Citations (Scopus)

Abstract

The potassium vanadium oxide-fluoride phase β-KVOF3 was prepared by in-situ reduction with hydrothermal methods and characterized by single-crystal X-ray diffraction and magnetic susceptibility measurements. The compound is orthorhombic [space group Pnma, a = 7.1596(2) Å, b = 7.5392(2) Å, c = 13.0506(4) Å, Z = 8]. The material is structurally similar and isoformulaic to d1 materials of formulae AVOF3 (A + = alkali metal, ammonium, or organic cation). Magnetic susceptibility data were successfully fit with a Heisenberg chain model. In-situ reduction of V5+ to V4+ during the hydrothermal reaction conditions was observed in the presence of Br- anions. The role of bromide ions in this reduction is explained and employed to reduce a d 0 vanadium species to obtain a material with magnetic behavior.

Original languageEnglish
Pages (from-to)1109-1114
Number of pages6
JournalZeitschrift fur Anorganische und Allgemeine Chemie
Volume640
Issue number6
DOIs
Publication statusPublished - May 2014

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Keywords

  • Heisenberg chain
  • Hydrothermal synthesis
  • Oxide-fluoride
  • Vanadium

ASJC Scopus subject areas

  • Inorganic Chemistry

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