Materials Data on K4CO4 by Materials Project

K4CO4 crystallizes in the tetragonal P4_2/n space group. The structure is three-dimensional. K1+ is bonded in a 6-coordinate geometry to six equivalent O2- atoms. There are a spread of K–O bond distances ranging from 2.61–2.96 Å. C4+ is bonded in a tetrahedral geometry to four equivalent O2- atoms. All C–O bond lengths are 1.44 Å. O2- is bonded in a distorted single-bond geometry to six equivalent K1+ and one C4+ atom.