Structure and chemical bonding in K14Cd9Tl21, a compound containing both isolated Tl11/7- clusters and (∞)/2([Cd9Tl10/7-] metallic layers

Monique Tillard-Charbonnel, Abdelkrim Chahine, Claude Belin, Roger Rousseau, Enric Canadell

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The compound K14Cd9Tl21 has been prepared by fusion of the elements in a tantalum reactor followed by slow cooling at the rate of 6 per hour to enable crystal growth. The X-ray crystal structure (hexagonal, P62m; a = 9.884(3),c= 17.173(5) Å; Z= 2) was refined to reliability factors of R1 = 5.09, wR2 = 11.64%. The anionic substructure contains both isolated clusters of Tl11/7- and a layered network based on Cd5Tl2 pentagonal bipyramids. The structure electron count relationship for the Tl11/7- cluster was analyzed in detail. The Cd9Tl10/7- layers are found to confer metallic properties to the material, and the bonding within such layers is found to be highly delocalized.

Original languageEnglish
Pages (from-to)799-806
Number of pages8
JournalChemistry - A European Journal
Volume3
Issue number5
DOIs
Publication statusPublished - May 1997

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Keywords

  • Zintl phases
  • cadmium
  • clusters
  • layered compounds
  • semiempirical calculations
  • thallium

ASJC Scopus subject areas

  • Catalysis
  • Organic Chemistry

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