Revised values of the bond-valence parameters for Te^IV-O, Te^VI-O and Te^IV-Cl

New bond-valence parameters r₀ and b have been re-determined for Te^IV-O, Te^VI-O and Te^IV-Cl.

Effect of lone-pair stereoactivity on polyhedral volume and structural flexibility: application to Te^IVO₆ octahedra

The volumes of 40 Te^IVO₆ coordination polyhedra studied are 10.3–23.7 ų, compared with the 12.83 ų expected for a regular octahedron. The anions lie close to a spherical surface whose radius varies with the degree of lone-pair localization; 95% of the variation in polyhedron volume is due to a change in both sphere radius and the uniformity of oxygen distribution over the sphere.