An unusual hybrid fluoride featuring a [V7F27](6-) chain motif based on a pyrochlore-like building unit

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Abstract

A new hybrid vanadium (III) fluoride [C4H12N2](3)[V7F27] has been synthesised solvothermally. The crystal structure (trigonal, R (3) over barc: a = 17.367(2) angstrom, c = 19.604(2) angstrom) reveals an unusual and novel chain motif consisting of pyrochlore-like heptameric units of corner-sharing octahedra, which are further linked into linear chains of alternating triple and single octahedral groups. The chains are separated by hydrogen-bonded piperazinium moieties. Magnetic susceptibility data show moderate antiferromagnetic interactions but no long-range order above 2 K, consistent with pronounced one-dimensional character, as well as frustration arising within the triangular units of magnetic ions in the chains. (C) 2008 Elsevier Inc. All rights reserved.

Original languageEnglish
Pages (from-to)3033-3036
Number of pages4
JournalJournal of Solid State Chemistry
Volume181
Issue number11
DOIs
Publication statusPublished - Nov 2008

Keywords

  • Vanadium fluoride
  • Solvothermal synthesis
  • Chain structure
  • Pyrochlore
  • CRYSTAL-STRUCTURE
  • VANADIUM OXYFLUORIDES
  • FRUSTRATED MAGNETS
  • CHEMISTRY
  • CSCRF4

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