Materials Data on NaCuO2 by Materials Project

NaCuO2 crystallizes in the orthorhombic Cmc2_1 space group. The structure is three-dimensional. Na1+ is bonded to four O2- atoms to form corner-sharing NaO4 tetrahedra. There are three shorter (2.28 Å) and one longer (2.33 Å) Na–O bond lengths. Cu3+ is bonded in a square co-planar geometry to four O2- atoms. There is two shorter (1.85 Å) and two longer (1.86 Å) Cu–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to two equivalent Na1+ and two equivalent Cu3+ atoms to form distorted corner-sharing ONa2Cu2 tetrahedra. In the second O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to two equivalent Na1+ and two equivalent Cu3+ atoms.