Na4CuTe2O25(O2)2 crystallizes in the triclinic P-1 space group. The structure consists of two hydrogen peroxide molecules inside a Na4CuTe2O25 framework. In the Na4CuTe2O25 framework, there are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 7-coordinate geometry to one O(1), one O(3), one O(5), one O(8), and three equivalent O(9) atoms. In the second Na site, Na(2) is bonded in a 5-coordinate geometry to one O(11), one O(12), one O(14), one O(6), one O(7), and one O(8) atom. Cu(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. Te(1) is bonded in a distorted water-like geometry to one O(2), one O(5), and one O(6) atom. There are thirteen inequivalent O sites. In the first O site, O(14) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Na(2) and two equivalent O(11) atoms. In the second O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), one Cu(1), and one O(9) atom. In the third O site, O(2) is bonded in a distorted trigonal planar geometry to one Cu(1), one Te(1), and one O(8) atom. In the fourth O site, O(3) is bonded in a water-like geometry to one Na(1) and one O(7) atom. In the fifth O site, O(4) is bonded in a single-bond geometry to one O(11) atom. In the sixth O site, O(5) is bonded in a bent 120 degrees geometry to one Na(1) and one Te(1) atom. In the seventh O site, O(6) is bonded in a bent 120 degrees geometry to one Na(2) and one Te(1) atom. In the eighth O site, O(7) is bonded in a bent 120 degrees geometry to one Na(2) and one O(3) atom. In the ninth O site, O(8) is bonded in a trigonal planar geometry to one Na(1), one Na(2), and one O(2) atom. In the tenth O site, O(9) is bonded in a distorted see-saw-like geometry to three equivalent Na(1) and one O(1) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Na(2), one O(14), and one O(4) atom. In the twelfth O site, O(12) is bonded in a distorted water-like geometry to one Na(2) and one O(13) atom. In the thirteenth O site, O(13) is bonded in a single-bond geometry to one O(12) atom.
Na4CuTe2O25(O2)2 crystallizes in the triclinic P-1 space group. The structure consists of two hydrogen peroxide molecules inside a Na4CuTe2O25 framework. In the Na4CuTe2O25 framework, there are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 7-coordinate geometry to one O(1), one O(3), one O(5), one O(8), and three equivalent O(9) atoms. The Na(1)-O(1) bond length is 2.88 Å. The Na(1)-O(3) bond length is 2.44 Å. The Na(1)-O(5) bond length is 2.24 Å. The Na(1)-O(8) bond length is 2.41 Å. There are a spread of Na(1)-O(9) bond distances ranging from 2.59-2.88 Å. In the second Na site, Na(2) is bonded in a 5-coordinate geometry to one O(11), one O(12), one O(14), one O(6), one O(7), and one O(8) atom. The Na(2)-O(11) bond length is 2.37 Å. The Na(2)-O(12) bond length is 2.54 Å. The Na(2)-O(14) bond length is 2.83 Å. The Na(2)-O(6) bond length is 2.27 Å. The Na(2)-O(7) bond length is 2.65 Å. The Na(2)-O(8) bond length is 2.63 Å. Cu(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. Both Cu(1)-O(1) bond lengths are 1.90 Å. Both Cu(1)-O(2) bond lengths are 1.91 Å. Te(1) is bonded in a distorted water-like geometry to one O(2), one O(5), and one O(6) atom. The Te(1)-O(2) bond length is 2.51 Å. The Te(1)-O(5) bond length is 1.84 Å. The Te(1)-O(6) bond length is 1.83 Å. There are thirteen inequivalent O sites. In the first O site, O(14) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Na(2) and two equivalent O(11) atoms. Both O(14)-O(11) bond lengths are 1.83 Å. In the second O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), one Cu(1), and one O(9) atom. The O(1)-O(9) bond length is 1.32 Å. In the third O site, O(2) is bonded in a distorted trigonal planar geometry to one Cu(1), one Te(1), and one O(8) atom. The O(2)-O(8) bond length is 1.34 Å. In the fourth O site, O(3) is bonded in a water-like geometry to one Na(1) and one O(7) atom. The O(3)-O(7) bond length is 1.26 Å. In the fifth O site, O(4) is bonded in a single-bond geometry to one O(11) atom. The O(4)-O(11) bond length is 1.26 Å. In the sixth O site, O(5) is bonded in a bent 120 degrees geometry to one Na(1) and one Te(1) atom. In the seventh O site, O(6) is bonded in a bent 120 degrees geometry to one Na(2) and one Te(1) atom. In the eighth O site, O(7) is bonded in a bent 120 degrees geometry to one Na(2) and one O(3) atom. In the ninth O site, O(8) is bonded in a trigonal planar geometry to one Na(1), one Na(2), and one O(2) atom. In the tenth O site, O(9) is bonded in a distorted see-saw-like geometry to three equivalent Na(1) and one O(1) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Na(2), one O(14), and one O(4) atom. In the twelfth O site, O(12) is bonded in a distorted water-like geometry to one Na(2) and one O(13) atom. The O(12)-O(13) bond length is 1.24 Å. In the thirteenth O site, O(13) is bonded in a single-bond geometry to one O(12) atom.