Synthesis and structure of BaPtIn3 and BaTl0.63In3.33. Two contrasting examples of preferential site occupation in BaAl4-Type structures

TitleSynthesis and structure of BaPtIn3 and BaTl0.63In3.33. Two contrasting examples of preferential site occupation in BaAl4-Type structures
Publication TypeJournal Article
Year of Publication2007
AuthorsPalasyuk A, Corbett JD
Journal TitleZeitschrift Fur Anorganische Und Allgemeine Chemie
Volume633
Pages2563-2567
Type of ArticleArticle
ISBN Number0044-2313
Accession NumberISI:000250808900006
Keywordsau, ba, bonding, CAZN2AL2, crystal chemistry, gold substitution, intermetallic compounds, metal substitution reactions, metals, NETWORK, polar intermetallics, REPRESENTATIVES, sr, structure, ZINTL BOUNDARY
Abstract

The title compounds have been synthesised by high temperature means and characterized by single crystal X-ray diffraction analysis. The compounds crystallize in the tetragonal structure type of BaAl4, 14/mmm, Z = 2 (a = 4.8130(7), 5.0196(8) A; c = 11.669(2), 11.900(3) A for BaPtIn3 and BaTl0.63In3.37 respectively).Platinum and thallium randomly substitute for 50% of the In in the apical 4e and for 30% in the basal 4d positions in the two networks, respectively. Consistent with both size and relative electronegativity factors, the basal positions in BaAl4-type structure are appropriate for substitution by dimensionally and chemically similar atoms (Tl), which is different from the apical sites in which electronegativities or bond strengths are more important (Pt).

DOI10.1002/zaac.200700358
Alternate JournalZ. Anorg. Allg. Chem.