REAu3Al7 (RE = rare earth): New ternary aluminides grown from aluminum flux

S. E. Latturner, D. Bilc, J. R. Ireland, C. R. Kannewurf, S. D. Mahanti, M. G. Kanatzidis

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24 Citations (Scopus)

Abstract

A series of ternary aluminide intermetallics with a new structure type were formed from the reaction of gold and rare-earth metals in aluminum flux. The REAu3Al7 structure was obtained with all rare earths RE with the exception of La and Eu. These materials crystallize in the rhombohedral space group R-3c, with unit cell parameters a=8.0922(6) Å and c=21.066(2) Å for PrAu3Al7 as an example. The variation in cell edges with rare-earth size is regular with the exception of the Yb analogue. The possible mixed valency indicated by this result was confirmed by magnetic susceptibility measurements. Density functional theory-based band structure calculations on YbAu3Al7 indicate the ytterbium f-orbitals are located just below the Fermi level, further supporting the mixed valence description of this material.

Original languageEnglish
Pages (from-to)48-57
Number of pages10
JournalJournal of Solid State Chemistry
Volume170
Issue number1
DOIs
Publication statusPublished - Jan 1 2003

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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