Abstract
The crystallochemical analysis of 188 structures containing 252 crystallographic kinds of Hg(II) atoms in Hg X n coordination polyhedra (X = F, Cl, Br, and I) has been performed by the method of intersecting spheres with the use of Vorono-Dirichlet polyhedra. It was found that halogen atoms surrounded by Hg(II) atoms are characterized by the coordination numbers from 3 to 8. It was demonstrated that, at the unvarying nature of the X atoms, the average Hg-X interatomic distance increases by 0.13–0.57 Å with an increase of the coordination number, whereas the average radius of spheres with the volume equal to that of the Vorono-Dirichlet polyhedron of a Hg atom is either independent of the coordination number (at X = F) or varies with it only by about 0.02–0.07 Å (at X = Cl, Br, and I). This allows the approximation of mercury atoms in the crystal structures by soft (deformable) spheres of a constant volume. Some results obtained in the analysis of the topology and the geometry of [Hgm X n ]z−-complexes in crystal structures are also presented.
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Translated from Kristallografiya, Vol. 46, No. 3, 2001, pp. 475–484.
Original Russian Text Copyright © 2001 by Serezhkin, Serezhkina, Ulanov, D’yachenko.
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Serezhkin, V.N., Serezhkina, L.B., Ulanov, A.S. et al. Hg X n coordination polyhedra (X = F, Cl, Br, and I) in crystal structures. Crystallogr. Rep. 46, 425–434 (2001). https://doi.org/10.1134/1.1376473
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DOI: https://doi.org/10.1134/1.1376473