ZnCo2O4 is Spinel-like structured and crystallizes in the orthorhombic Imma space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form CoO4 tetrahedra that share corners with six equivalent Co(2)O6 octahedra and corners with six equivalent Zn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 53-59°. In the second Co site, Co(2) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form CoO6 octahedra that share corners with six equivalent Co(1)O4 tetrahedra, edges with two equivalent Co(2)O6 octahedra, and edges with four equivalent Zn(1)O6 octahedra. Zn(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form ZnO6 octahedra that share corners with six equivalent Co(1)O4 tetrahedra, edges with two equivalent Zn(1)O6 octahedra, and edges with four equivalent Co(2)O6 octahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Co(1), one Co(2), and two equivalent Zn(1) atoms. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Co(1), two equivalent Co(2), and one Zn(1) atom.
ZnCo2O4 is Spinel-like structured and crystallizes in the orthorhombic Imma space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form CoO4 tetrahedra that share corners with six equivalent Co(2)O6 octahedra and corners with six equivalent Zn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 53-59°. Both Co(1)-O(1) bond lengths are 1.89 Å. Both Co(1)-O(2) bond lengths are 1.92 Å. In the second Co site, Co(2) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form CoO6 octahedra that share corners with six equivalent Co(1)O4 tetrahedra, edges with two equivalent Co(2)O6 octahedra, and edges with four equivalent Zn(1)O6 octahedra. Both Co(2)-O(1) bond lengths are 2.00 Å. All Co(2)-O(2) bond lengths are 2.04 Å. Zn(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form ZnO6 octahedra that share corners with six equivalent Co(1)O4 tetrahedra, edges with two equivalent Zn(1)O6 octahedra, and edges with four equivalent Co(2)O6 octahedra. Both Zn(1)-O(2) bond lengths are 2.14 Å. All Zn(1)-O(1) bond lengths are 2.08 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Co(1), one Co(2), and two equivalent Zn(1) atoms. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Co(1), two equivalent Co(2), and one Zn(1) atom.