Cd2Os2O7 crystallizes in the cubic Fd-3m space group. Os(1) is bonded to six equivalent O(2) atoms to form OsO6 octahedra that share corners with six equivalent Os(1)O6 octahedra and edges with six equivalent Cd(1)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 42°. Cd(1) is bonded to two equivalent O(1) and six equivalent O(2) atoms to form distorted CdO8 hexagonal bipyramids that share edges with six equivalent Cd(1)O8 hexagonal bipyramids and edges with six equivalent Os(1)O6 octahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Cd(1) atoms to form corner-sharing OCd4 tetrahedra. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Os(1) and two equivalent Cd(1) atoms.
Cd2Os2O7 crystallizes in the cubic Fd-3m space group. Os(1) is bonded to six equivalent O(2) atoms to form OsO6 octahedra that share corners with six equivalent Os(1)O6 octahedra and edges with six equivalent Cd(1)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 42°. All Os(1)-O(2) bond lengths are 1.95 Å. Cd(1) is bonded to two equivalent O(1) and six equivalent O(2) atoms to form distorted CdO8 hexagonal bipyramids that share edges with six equivalent Cd(1)O8 hexagonal bipyramids and edges with six equivalent Os(1)O6 octahedra. Both Cd(1)-O(1) bond lengths are 2.23 Å. All Cd(1)-O(2) bond lengths are 2.62 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Cd(1) atoms to form corner-sharing OCd4 tetrahedra. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Os(1) and two equivalent Cd(1) atoms.