Materials Data on K2TeO6 by Materials Project
K2TeO6 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are two inequivalent K sites. In the first K site, K is bonded to six O atoms to form a mixture of distorted edge and corner-sharing KO6 pentagonal pyramids. There are a spread of K–O bond distances ranging from 2.71–2.85 Å. In the second K site, K is bonded in a 9-coordinate geometry to nine O atoms. There are a spread of K–O bond distances ranging from 2.69–3.05 Å. Te is bonded in a distorted trigonal non-coplanar geometry to three O atoms. There is one shorter (1.90 Å) and two longer (1.91 Å) Te–O bond length. There are four inequivalent O sites. In the first O site, O is bonded in a distorted square co-planar geometry to four K atoms. In the second O site, O is bonded in a distorted water-like geometry to one K and one Te atom. In the third O site, O is bonded in a bent 120 degrees geometry to one K and one Te atom. In the fourth O site, O is bonded in a distorted rectangular see-saw-like geometry to four K atoms.