The new binary intermetallic YbGe2.83

C. Peter Sebastian, Mercouri G. Kanatzidis

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26 Citations (Scopus)

Abstract

The new compound YbGe2.83 was obtained from the reaction of Yb and Ge in liquid indium. The crystal structure of YbGe2.83 adopts the trigonal, P3m1 space group with a=b=8.3657(12) and c=7.0469(14) . The structure of YbGe2.83 is a variant of the CaAl2Si2 structure type with ordered vacancies. Germanium atoms form double layers of puckered hexagons creating slabs that sandwich the Yb atoms. YbGe2.83 can be classified as a Zintl compound with the formula Yb (2x)(Ge2.83)(2x)-. The deficiencies at the Ge sites cause a mixed/intermediate valent state of ytterbium (Yb2.35). Valence bond sum calculations suggest an average valence of Yb ions in YbGe 2.83 of 2.51 consistent with an intermediate valence compound.

Original languageEnglish
Pages (from-to)2077-2081
Number of pages5
JournalJournal of Solid State Chemistry
Volume183
Issue number9
DOIs
Publication statusPublished - Sep 1 2010

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Keywords

  • Intermetallics
  • Mixed valence
  • Superstructure
  • YbGe system
  • Zintl phase

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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