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DOE OSTI2020

Materials Data on KIO2 by Materials Project

KO2I crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. K is bonded in a distorted body-centered cubic geometry to eight equivalent O atoms. All K–O bond lengths are 2.98 Å. O is bonded to four equivalent K and two equivalent I atoms to form a mixture of corner, edge, and face-sharing OK4I2 octahedra. The corner-sharing octahedra tilt angles range from 0–61°. Both O–I bond lengths are 2.15 Å. I is bonded in a square co-planar geometry to four equivalent O atoms.

36 MATERIALS SCIENCE↗

DOE OSTI2020

Materials Data on KIO2 by Materials Project

KO2I crystallizes in the tetragonal I4_1/amd space group. The structure is three-dimensional. K is bonded to six equivalent O atoms to form edge-sharing KO6 octahedra. There are four shorter (2.67 Å) and two longer (2.93 Å) K–O bond lengths. O is bonded to three equivalent K and two equivalent I atoms to form a mixture of distorted edge and corner-sharing OK3I2 square pyramids. Both O–I bond lengths are 2.23 Å. I is bonded in a distorted square co-planar geometry to four equivalent O atoms.

36 MATERIALS SCIENCE↗