Co2In2O7 crystallizes in the cubic Fd-3m space group. Co(1) is bonded to six equivalent O(2) atoms to form CoO6 octahedra that share corners with six equivalent Co(1)O6 octahedra and edges with six equivalent In(1)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 48°. In(1) is bonded to two equivalent O(1) and six equivalent O(2) atoms to form distorted InO8 hexagonal bipyramids that share edges with six equivalent In(1)O8 hexagonal bipyramids and edges with six equivalent Co(1)O6 octahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded to four equivalent In(1) atoms to form OIn4 tetrahedra that share corners with four equivalent O(1)In4 tetrahedra, corners with twelve equivalent O(2)In2Co2 tetrahedra, and edges with six equivalent O(2)In2Co2 tetrahedra. In the second O site, O(2) is bonded to two equivalent Co(1) and two equivalent In(1) atoms to form distorted OIn2Co2 tetrahedra that share corners with two equivalent O(1)In4 tetrahedra, corners with twelve equivalent O(2)In2Co2 tetrahedra,  an edgeedge with one O(1)In4 tetrahedra, and edges with four equivalent O(2)In2Co2 tetrahedra.
Co2In2O7 crystallizes in the cubic Fd-3m space group. Co(1) is bonded to six equivalent O(2) atoms to form CoO6 octahedra that share corners with six equivalent Co(1)O6 octahedra and edges with six equivalent In(1)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 48°. All Co(1)-O(2) bond lengths are 1.88 Å. In(1) is bonded to two equivalent O(1) and six equivalent O(2) atoms to form distorted InO8 hexagonal bipyramids that share edges with six equivalent In(1)O8 hexagonal bipyramids and edges with six equivalent Co(1)O6 octahedra. Both In(1)-O(1) bond lengths are 2.10 Å. All In(1)-O(2) bond lengths are 2.39 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded to four equivalent In(1) atoms to form OIn4 tetrahedra that share corners with four equivalent O(1)In4 tetrahedra, corners with twelve equivalent O(2)In2Co2 tetrahedra, and edges with six equivalent O(2)In2Co2 tetrahedra. In the second O site, O(2) is bonded to two equivalent Co(1) and two equivalent In(1) atoms to form distorted OIn2Co2 tetrahedra that share corners with two equivalent O(1)In4 tetrahedra, corners with twelve equivalent O(2)In2Co2 tetrahedra,  an edgeedge with one O(1)In4 tetrahedra, and edges with four equivalent O(2)In2Co2 tetrahedra.