Abstract
The Voronoi-Dirichlet (VD) polyhedra and the intersecting spheres method have been used to analyze the coordination of Te(IV) and Te(VI) atoms by oxygen atoms in the crystal structures of 317 compounds. The quantitative estimation of the steric effect of the Te(IV) lone electron pair, giving rise to the asymmetry of the coordination sphere and manifesting itself as a substantial (on average, by 0.5(1) A) displacement of Te(IV) atoms from the centroids of their VD polyhedra, is presented.
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