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A Study on AB 2 X 5 Compounds. II. Refinement of the Structures of InSn 2 Br 5 and InSn 2 I 5
Author(s) -
Beck H. P.
Publication year - 1986
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.19865360506
Subject(s) - tetragonal crystal system , crystallography , crystal structure , structure type , lone pair , chemistry , materials science , physics , molecule , organic chemistry
The refinement of the structure of InSn 2 Br 5 and InSn 2 I 5 is reported. Both compounds crystallize with the tetragonal NH 4 Pb 2 Br 5 type arrangement (a = 828.5(9) and 881.0(8) (pm), c = 1443.8(20) and 1524.0(3) (pm) respectively). We discuss the parameters in comparison with those of Tl 5 Se 2 I crystallizing in the antitype structure, and we derive the parameters of a model structure based on the packing of hard spheres. It can be shown, that bond distances and thermal parameters seeming unusual at first sight are not to be attributed to the interaction of lone pairs, since we find them in our model structure as well.