Materials Data on K2TiO3 by Materials Project
K2TiO3 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. K1+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of K–O bond distances ranging from 2.75–3.22 Å. Ti4+ is bonded to five O2- atoms to form distorted edge-sharing TiO5 trigonal bipyramids. There is one shorter (1.78 Å) and four longer (1.97 Å) Ti–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to six equivalent K1+ and one Ti4+ atom. In the second O2- site, O2- is bonded in a 6-coordinate geometry to four equivalent K1+ and two equivalent Ti4+ atoms.
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