Materials Data on K4CO4 by Materials Project

Abstract

K4CO4 crystallizes in the monoclinic Cm space group. The structure is three-dimensional. there are three inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of K–O bond distances ranging from 2.57–2.88 Å. In the second K1+ site, K1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of K–O bond distances ranging from 2.53–2.99 Å. In the third K1+ site, K1+ is bonded in a 2-coordinate geometry to four O2- atoms. There are a spread of K–O bond distances ranging from 2.52–2.90 Å. C4+ is bonded in a tetrahedral geometry to four O2- atoms. There is two shorter (1.43 Å) and two longer (1.45 Å) C–O bond length. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to four K1+ and one C4+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to five K1+ and one C4+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to four K1+ and one C4+ atom.