NaCu3O2 crystallizes in the orthorhombic Ibam space group. Na(1) is bonded to four equivalent O(1) atoms to form distorted edge-sharing NaO4 tetrahedra. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a linear geometry to two equivalent O(1) atoms. In the second Cu site, Cu(2) is bonded in a linear geometry to two equivalent O(1) atoms. O(1) is bonded in a 5-coordinate geometry to two equivalent Na(1), one Cu(1), and two equivalent Cu(2) atoms.
NaCu3O2 crystallizes in the orthorhombic Ibam space group. Na(1) is bonded to four equivalent O(1) atoms to form distorted edge-sharing NaO4 tetrahedra. All Na(1)-O(1) bond lengths are 2.31 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a linear geometry to two equivalent O(1) atoms. Both Cu(1)-O(1) bond lengths are 1.90 Å. In the second Cu site, Cu(2) is bonded in a linear geometry to two equivalent O(1) atoms. Both Cu(2)-O(1) bond lengths are 1.87 Å. O(1) is bonded in a 5-coordinate geometry to two equivalent Na(1), one Cu(1), and two equivalent Cu(2) atoms.