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Synthesis and Structure of BaPtIn 3 and BaTl 0.63 In 3.33 . Two Contrasting Examples of Preferential Site Occupation in BaAl 4 ‐Type Structures
Author(s) -
Palasyuk Andriy,
Corbett John D.
Publication year - 2007
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200700358
Subject(s) - tetragonal crystal system , electronegativity , crystallography , thallium , chemistry , crystal structure , bond length , diffraction , platinum , type (biology) , materials science , physics , inorganic chemistry , geology , catalysis , optics , organic chemistry , paleontology
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 BaAl 4 , I 4/ mmm , Z = 2 ( a = 4.8130(7), 5.0196(8) Å; c = 11.669(2), 11.900(3) Å for BaPtIn 3 and BaTl 0.63 In 3.37 , respectively).Platinum and thallium randomly substitute for 50 % of the In in the apical 4 e and for 30 % in the basal 4 d positions in the two networks, respectively. Consistent with both size and relative electronegativity factors, the basal positions in BaAl 4 ‐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).