research papers
The volumes of 40 TeIVO6 coordination polyhedra studied are 10.3–23.7 Å3, compared with the 12.83 Å3 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.