Materials Data on Na4CO4 by Materials Project

Abstract

Na4CO4 crystallizes in the monoclinic Cm space group. The structure is three-dimensional. there are three inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Na–O bond distances ranging from 2.22–2.59 Å. In the second Na1+ site, Na1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Na–O bond distances ranging from 2.23–2.54 Å. In the third Na1+ site, Na1+ is bonded in a 3-coordinate geometry to three O2- atoms. There are two shorter (2.22 Å) and one longer (2.44 Å) Na–O bond lengths. C4+ is bonded in a tetrahedral geometry to four O2- atoms. There is two shorter (1.44 Å) and two longer (1.47 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 five Na1+ and one C4+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to four Na1+ and one C4+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to five Na1+ and one C4+ atom.