Materials Data on Na3CuO3 by Materials Project
Na3CuO3 crystallizes in the orthorhombic Cmce space group. The structure is three-dimensional. there are six inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.40–2.63 Å. In the second Na1+ site, Na1+ is bonded to four O2- atoms to form distorted corner-sharing NaO4 trigonal pyramids. All Na–O bond lengths are 2.24 Å. In the third Na1+ site, Na1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.43–2.58 Å. In the fourth Na1+ site, Na1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.42–2.68 Å. In the fifth 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 2.34–2.48 Å. In the sixth Na1+ site, Na1+ is bonded to four O2- atoms to form a mixture of distorted edge and corner-sharing NaO4 tetrahedra. There are a spread of Na–O bond distances ranging from 2.34–2.45 Å. There are three inequivalent Cu3+ sites. In the first Cu3+ site, Cu3+ is bonded in a square co-planar geometry to four O2- atoms. There is two shorter (1.83 Å) and two longer (1.88 Å) Cu–O bond length. In the second Cu3+ site, Cu3+ is bonded in a rectangular see-saw-like geometry to four O2- atoms. There is two shorter (1.87 Å) and two longer (1.88 Å) Cu–O bond length. In the third Cu3+ site, Cu3+ is bonded in a square co-planar geometry to four O2- atoms. There is two shorter (1.83 Å) and two longer (1.88 Å) Cu–O bond length. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a 7-coordinate geometry to six Na1+ and one Cu3+ atom. In the second O2- site, O2- is bonded in a 5-coordinate geometry to three Na1+ and two Cu3+ atoms. In the third O2- site, O2- is bonded in a 7-coordinate geometry to six Na1+ and one Cu3+ atom. In the fourth O2- site, O2- is bonded in a 7-coordinate geometry to six Na1+ and one Cu3+ atom. In the fifth O2- site, O2- is bonded in a 6-coordinate geometry to four Na1+ and two equivalent Cu3+ atoms.