Co(NiO2)4 is beta indium sulfide-derived structured and crystallizes in the monoclinic C2/m space group. Co(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form CoO6 octahedra that share edges with two equivalent Ni(2)O6 octahedra, edges with two equivalent Ni(3)O6 octahedra, and edges with four equivalent Ni(1)O6 octahedra. There are three inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form NiO6 octahedra that share edges with two equivalent Co(1)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, edges with two equivalent Ni(2)O6 octahedra, and edges with two equivalent Ni(3)O6 octahedra. In the second Ni site, Ni(2) is bonded to two equivalent O(3) and four equivalent O(1) atoms to form NiO6 octahedra that share corners with six equivalent Ni(3)O6 octahedra, edges with two equivalent Co(1)O6 octahedra, and edges with four equivalent Ni(1)O6 octahedra. The corner-sharing octahedral tilt angles are 13°. In the third Ni site, Ni(3) is bonded to two equivalent O(3) and four equivalent O(1) atoms to form NiO6 octahedra that share corners with six equivalent Ni(2)O6 octahedra, edges with two equivalent Co(1)O6 octahedra, and edges with four equivalent Ni(1)O6 octahedra. The corner-sharing octahedral tilt angles are 13°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Co(1), one Ni(1), one Ni(2), and one Ni(3) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Co(1) and two equivalent Ni(1) atoms. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Ni(2), one Ni(3), and two equivalent Ni(1) atoms.
Co(NiO2)4 is beta indium sulfide-derived structured and crystallizes in the monoclinic C2/m space group. Co(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form CoO6 octahedra that share edges with two equivalent Ni(2)O6 octahedra, edges with two equivalent Ni(3)O6 octahedra, and edges with four equivalent Ni(1)O6 octahedra. Both Co(1)-O(2) bond lengths are 1.91 Å. All Co(1)-O(1) bond lengths are 1.88 Å. There are three inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form NiO6 octahedra that share edges with two equivalent Co(1)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, edges with two equivalent Ni(2)O6 octahedra, and edges with two equivalent Ni(3)O6 octahedra. Both Ni(1)-O(1) bond lengths are 1.88 Å. Both Ni(1)-O(2) bond lengths are 1.90 Å. Both Ni(1)-O(3) bond lengths are 1.88 Å. In the second Ni site, Ni(2) is bonded to two equivalent O(3) and four equivalent O(1) atoms to form NiO6 octahedra that share corners with six equivalent Ni(3)O6 octahedra, edges with two equivalent Co(1)O6 octahedra, and edges with four equivalent Ni(1)O6 octahedra. The corner-sharing octahedral tilt angles are 13°. Both Ni(2)-O(3) bond lengths are 2.05 Å. All Ni(2)-O(1) bond lengths are 2.04 Å. In the third Ni site, Ni(3) is bonded to two equivalent O(3) and four equivalent O(1) atoms to form NiO6 octahedra that share corners with six equivalent Ni(2)O6 octahedra, edges with two equivalent Co(1)O6 octahedra, and edges with four equivalent Ni(1)O6 octahedra. The corner-sharing octahedral tilt angles are 13°. Both Ni(3)-O(3) bond lengths are 2.06 Å. All Ni(3)-O(1) bond lengths are 2.07 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Co(1), one Ni(1), one Ni(2), and one Ni(3) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Co(1) and two equivalent Ni(1) atoms. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Ni(2), one Ni(3), and two equivalent Ni(1) atoms.