NaCuO2 crystallizes in the orthorhombic Cmc2_1 space group. Na(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form corner-sharing NaO4 tetrahedra. Cu(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Na(1) and two equivalent Cu(1) atoms to form distorted corner-sharing ONa2Cu2 tetrahedra. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to two equivalent Na(1) and two equivalent Cu(1) atoms.
NaCuO2 crystallizes in the orthorhombic Cmc2_1 space group. Na(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form corner-sharing NaO4 tetrahedra. There is one shorter (2.28 Å) and one longer (2.33 Å) Na(1)-O(1) bond length. Both Na(1)-O(2) bond lengths are 2.28 Å. Cu(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. Both Cu(1)-O(1) bond lengths are 1.86 Å. Both Cu(1)-O(2) bond lengths are 1.85 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Na(1) and two equivalent Cu(1) atoms to form distorted corner-sharing ONa2Cu2 tetrahedra. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to two equivalent Na(1) and two equivalent Cu(1) atoms.