Materials Data on KSiO3 by Materials Project

Abstract

KSiO3 crystallizes in the orthorhombic Cmce space group. The structure is three-dimensional. there are two inequivalent K sites. In the first K site, K is bonded in a 6-coordinate geometry to six O atoms. There are a spread of K–O bond distances ranging from 2.85–3.14 Å. In the second K site, K is bonded in a 8-coordinate geometry to eight O atoms. There are a spread of K–O bond distances ranging from 2.66–3.18 Å. There are two inequivalent Si sites. In the first Si site, Si is bonded to four O atoms to form corner-sharing SiO4 tetrahedra. There is two shorter (1.62 Å) and two longer (1.66 Å) Si–O bond length. In the second Si site, Si is bonded to four O atoms to form corner-sharing SiO4 tetrahedra. There is two shorter (1.61 Å) and two longer (1.66 Å) Si–O bond length. There are four inequivalent O sites. In the first O site, O is bonded in a distorted single-bond geometry to two equivalent K and one Si atom. In the second O site, O is bonded in a distorted bent 150 degrees geometry to two K and two Si atoms. In the third O site, O is bonded in a distorted single-bond geometry to four K and one Si atom. In the fourth O site, O is bonded in a 1-coordinate geometry to two K and one Si atom.