Materials Data on KCO3 by Materials Project

KCO3 crystallizes in the monoclinic P2_1/c space group. The structure is two-dimensional and consists of two KCO3 sheets oriented in the (0, 0, 1) direction. K is bonded in a 8-coordinate geometry to eight O atoms. There are a spread of K–O bond distances ranging from 2.73–3.21 Å. C is bonded in a trigonal planar geometry to three O atoms. There is two shorter (1.28 Å) and one longer (1.29 Å) C–O bond length. There are three inequivalent O sites. In the first O site, O is bonded in a single-bond geometry to four equivalent K and one C atom. In the second O site, O is bonded in a distorted single-bond geometry to two equivalent K and one C atom. In the third O site, O is bonded in a distorted single-bond geometry to two equivalent K and one C atom.