NaO2 crystallizes in the tetragonal P4_2/mnm space group. Na(1) is bonded to six equivalent O(1) atoms to form a mixture of edge and corner-sharing NaO6 octahedra. The corner-sharing octahedral tilt angles are 74°. O(1) is bonded in a 4-coordinate geometry to three equivalent Na(1) and one O(1) atom.
NaO2 crystallizes in the tetragonal P4_2/mnm space group. Na(1) is bonded to six equivalent O(1) atoms to form a mixture of edge and corner-sharing NaO6 octahedra. The corner-sharing octahedral tilt angles are 74°. There are two shorter (2.38 Å) and four longer (2.39 Å) Na(1)-O(1) bond lengths. O(1) is bonded in a 4-coordinate geometry to three equivalent Na(1) and one O(1) atom. The O(1)-O(1) bond length is 1.36 Å.