Na2O2 is alpha boron-derived structured and crystallizes in the hexagonal P-62m space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to two equivalent O(2) and four equivalent O(1) atoms. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to two equivalent O(2) and four equivalent O(1) atoms. There are two inequivalent O sites. In the first O site, O(2) is bonded in a 7-coordinate geometry to three equivalent Na(1), three equivalent Na(2), and one O(2) atom. In the second O site, O(1) is bonded to three equivalent Na(1), three equivalent Na(2), and one O(1) atom to form a mixture of distorted edge, corner, and face-sharing ONa6O pentagonal bipyramids.
Na2O2 is alpha boron-derived structured and crystallizes in the hexagonal P-62m space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to two equivalent O(2) and four equivalent O(1) atoms. Both Na(1)-O(2) bond lengths are 2.34 Å. All Na(1)-O(1) bond lengths are 2.29 Å. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to two equivalent O(2) and four equivalent O(1) atoms. Both Na(2)-O(2) bond lengths are 2.37 Å. All Na(2)-O(1) bond lengths are 2.43 Å. There are two inequivalent O sites. In the first O site, O(2) is bonded in a 7-coordinate geometry to three equivalent Na(1), three equivalent Na(2), and one O(2) atom. The O(2)-O(2) bond length is 1.53 Å. In the second O site, O(1) is bonded to three equivalent Na(1), three equivalent Na(2), and one O(1) atom to form a mixture of distorted edge, corner, and face-sharing ONa6O pentagonal bipyramids. The O(1)-O(1) bond length is 1.54 Å.