Synthesis and characterization of the rare-earth vanadium oxyselenides Ln7VO4SE8 (Ln = Nd, Sm, Gd)

Olivier Tougait, James A. Ibers*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The new compounds Ln7VO4Se8 (Ln = Nd, Sm, Gd) were each prepared by heating V, Se, and the corresponding rare-earth sesquioxide at 1223 K in a sealed fused-silica tube. Single crystals have been grown through the use of an antimony flux. They have been characterized by single-crystal and powder X-ray diffraction measurements and by energy dispersive X-ray analysis. These isostructural compounds crystallize with two formula units in the orthorhombic space group Pbam in cells (at 153 K) of dimensions: Nd7VO4Se8, a = 14.3419(9) Å, b = 15.5528(10) Å, c = 3.9948(3) Å; Sm7VO4Se8, a = 14.200(2) Å, b = 15.451(2) Å, c = 3.9511(6) Å; Gd7VO4Se8, a = 14.075(8) Å, b = 15.424(6) Å, c = 3.903(1) Å. The new structure type comprises four crystallographically independent Ln atoms with three different coordination geometries and one V atom in an octahedral environment. Magnetic measurements reveal that Gd7VO4Se8 is paramagnetic down to 5 K. (C) 2000 Academic Press.

Original languageEnglish (US)
Pages (from-to)564-568
Number of pages5
JournalJournal of Solid State Chemistry
Volume154
Issue number2
DOIs
StatePublished - 2000

Keywords

  • Gadolinium
  • Magnetism
  • Neodymium
  • Oxychalcogenide
  • Samarium
  • X-ray structure

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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