Synthesis, structure, and bonding of hypoelectronic SrIn4: Direct example of a dominant size effect in structure selection

D. K. Seo, J. D. Corbett

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57 Citations (Scopus)

Abstract

The structure of the new title compound, the same type as EuIn4, was refined in the monoclinic space group C2/m, with Z = 4. The compound exhibits a complex three-dimensional network built of four-and five-bonded indium atoms in fused and interbonded pentagons that sandwich the strontium atoms. Both electronic band-structure calculations and property measurements show that the compound is metallic. A detailed band-structure analysis indicates that the compound is hypoelectronic with a one-electron deficiency, but the In - In bonding is effectively optimized in the structure. The important role of cation size in the structure choice is noted in a comparative study of BaIn4, which has the closely related BaAl4-type structure in which barium atoms are sandwiched by six-membered rings.

Original languageEnglish
Pages (from-to)9621-9627
Number of pages7
JournalJournal of the American Chemical Society
Volume122
Issue number40
DOIs
Publication statusPublished - Oct 11 2000

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ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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