K2O2 is alpha boron-derived structured and crystallizes in the hexagonal P-62m space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to two equivalent O(2) and four equivalent O(1) atoms. In the second K site, K(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 K(1), three equivalent K(2), and one O(2) atom. In the second O site, O(1) is bonded to three equivalent K(1), three equivalent K(2), and one O(1) atom to form a mixture of distorted edge, face, and corner-sharing OK6O pentagonal bipyramids.
K2O2 is alpha boron-derived structured and crystallizes in the hexagonal P-62m space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to two equivalent O(2) and four equivalent O(1) atoms. Both K(1)-O(2) bond lengths are 2.71 Å. All K(1)-O(1) bond lengths are 2.61 Å. In the second K site, K(2) is bonded in a 6-coordinate geometry to two equivalent O(2) and four equivalent O(1) atoms. Both K(2)-O(2) bond lengths are 2.69 Å. All K(2)-O(1) bond lengths are 2.84 Å. There are two inequivalent O sites. In the first O site, O(2) is bonded in a 7-coordinate geometry to three equivalent K(1), three equivalent K(2), and one O(2) atom. The O(2)-O(2) bond length is 1.52 Å. In the second O site, O(1) is bonded to three equivalent K(1), three equivalent K(2), and one O(1) atom to form a mixture of distorted edge, face, and corner-sharing OK6O pentagonal bipyramids. The O(1)-O(1) bond length is 1.53 Å.