ThSi 2 type ytterbium disilicide and its analogues YbT xSi 2-x (T = Cr, Fe, Co)

Sebastian C. Peter, Mercouri G. Kanatzidis

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Abstract

YbSi 2 and the derivatives YbT xSi 2-x (T = Cr, Fe, Co) crystallizing in the α-ThSi 2 structure type were obtained as single crystals from reactions run in liquid indium. All silicides were investigated by single-crystal X-ray diffraction, I4 1/amd space group and the lattice constants are: a = 3.9868(6) Å and c = 13.541(3) Å for YbSi 2, a = 4.0123(6) Å and c = 13.542(3) Å for YbCr 0.27Si 1.73, a = 4.0142(6) Å and c = 13.830(3) Å for YbCr 0.71Si 1.29, a = 4.0080(6) Å and c = 13.751(3) Å for YbFe 0.34Si 1.66, and a = 4.0036(6) Å, c = 13.707(3) Å for YbCo 0.21Si 1.79. YbSi 2 and YbT xSi 2-x compounds are polar intermetallics with three-dimensional Si and M (T+Si) polyanion sub-networks, respectively, filled with ytterbium atoms. The degree of substitution of transition metal at the silicon site is signficant and leads to changes in the average bond lengths and bond angles substantially.

Original languageEnglish
Pages (from-to)287-293
Number of pages7
JournalZeitschrift fur Anorganische und Allgemeine Chemie
Volume638
Issue number2
DOIs
Publication statusPublished - Feb 1 2012

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Keywords

  • Crystal growth
  • Intermetallics
  • Metal flux synthesis
  • Ytterbium

ASJC Scopus subject areas

  • Inorganic Chemistry

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