(Na2Co3O5)2O2 crystallizes in the orthorhombic Amm2 space group. The structure consists of two hydrogen peroxide molecules inside a Na2Co3O5 framework. In the Na2Co3O5 framework, there are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a 4-coordinate geometry to four equivalent O(2) atoms. In the second Na site, Na(2) is bonded in a 4-coordinate geometry to four equivalent O(1) atoms. In the third Na site, Na(3) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(4) atom. In the second Co site, Co(2) is bonded in a rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(2) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Na(2), one Na(3), one Co(1), and one Co(2) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Na(1), one Na(3), one Co(1), and one Co(2) atom. In the third O site, O(4) is bonded in a distorted bent 120 degrees geometry to two equivalent Na(3) and two equivalent Co(1) atoms.
(Na2Co3O5)2O2 crystallizes in the orthorhombic Amm2 space group. The structure consists of two hydrogen peroxide molecules inside a Na2Co3O5 framework. In the Na2Co3O5 framework, there are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a 4-coordinate geometry to four equivalent O(2) atoms. All Na(1)-O(2) bond lengths are 2.29 Å. In the second Na site, Na(2) is bonded in a 4-coordinate geometry to four equivalent O(1) atoms. All Na(2)-O(1) bond lengths are 2.52 Å. In the third Na site, Na(3) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms. Both Na(3)-O(1) bond lengths are 2.56 Å. Both Na(3)-O(2) bond lengths are 2.39 Å. Both Na(3)-O(4) bond lengths are 2.83 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(4) atom. The Co(1)-O(1) bond length is 1.80 Å. The Co(1)-O(2) bond length is 1.79 Å. The Co(1)-O(4) bond length is 1.82 Å. In the second Co site, Co(2) is bonded in a rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(2) atoms. Both Co(2)-O(1) bond lengths are 1.85 Å. Both Co(2)-O(2) bond lengths are 1.86 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Na(2), one Na(3), one Co(1), and one Co(2) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Na(1), one Na(3), one Co(1), and one Co(2) atom. In the third O site, O(4) is bonded in a distorted bent 120 degrees geometry to two equivalent Na(3) and two equivalent Co(1) atoms.