Sr2CuOsO6 crystallizes in the tetragonal I4/m space group. Sr(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(2) atoms. Os(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form OsO6 octahedra that share corners with six equivalent Cu(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-25°. Cu(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form CuO6 octahedra that share corners with six equivalent Os(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-25°. There are two inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Sr(1), one Os(1), and one Cu(1) atom to form a mixture of edge and corner-sharing OSr4CuOs octahedra. The corner-sharing octahedral tilt angles range from 0-9°. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Os(1), and one Cu(1) atom.
Sr2CuOsO6 crystallizes in the tetragonal I4/m space group. Sr(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(2) atoms. All Sr(1)-O(1) bond lengths are 2.73 Å. All Sr(1)-O(2) bond lengths are 2.63 Å. Os(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form OsO6 octahedra that share corners with six equivalent Cu(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-25°. Both Os(1)-O(1) bond lengths are 1.96 Å. All Os(1)-O(2) bond lengths are 1.92 Å. Cu(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form CuO6 octahedra that share corners with six equivalent Os(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-25°. Both Cu(1)-O(1) bond lengths are 2.37 Å. All Cu(1)-O(2) bond lengths are 2.02 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Sr(1), one Os(1), and one Cu(1) atom to form a mixture of edge and corner-sharing OSr4CuOs octahedra. The corner-sharing octahedral tilt angles range from 0-9°. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Os(1), and one Cu(1) atom.