Co2Zn3O7 crystallizes in the orthorhombic Cmc2_1 space group. Co(1) is bonded to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms to form corner-sharing CoO6 octahedra. The corner-sharing octahedral tilt angles range from 40-42°. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent O(4) and four equivalent O(3) atoms. In the second Zn site, Zn(2) is bonded in a 6-coordinate geometry to one O(3), two equivalent O(2), and three equivalent O(1) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Co(1) and three equivalent Zn(2) atoms to form OZn3Co tetrahedra that share  a cornercorner with one O(4)Zn2Co2 tetrahedra and corners with six equivalent O(1)Zn3Co tetrahedra. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Co(1) and two equivalent Zn(2) atoms. In the third O site, O(3) is bonded in a 5-coordinate geometry to two equivalent Co(1), one Zn(2), and two equivalent Zn(1) atoms. In the fourth O site, O(4) is bonded to two equivalent Co(1) and two equivalent Zn(1) atoms to form distorted OZn2Co2 tetrahedra that share corners with two equivalent O(4)Zn2Co2 tetrahedra and corners with two equivalent O(1)Zn3Co tetrahedra.
Co2Zn3O7 crystallizes in the orthorhombic Cmc2_1 space group. Co(1) is bonded to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms to form corner-sharing CoO6 octahedra. The corner-sharing octahedral tilt angles range from 40-42°. The Co(1)-O(1) bond length is 1.91 Å. The Co(1)-O(4) bond length is 1.95 Å. There is one shorter (1.88 Å) and one longer (1.94 Å) Co(1)-O(2) bond length. There is one shorter (1.88 Å) and one longer (1.94 Å) Co(1)-O(3) bond length. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent O(4) and four equivalent O(3) atoms. There is one shorter (2.02 Å) and one longer (2.05 Å) Zn(1)-O(4) bond length. There are two shorter (2.02 Å) and two longer (2.50 Å) Zn(1)-O(3) bond lengths. In the second Zn site, Zn(2) is bonded in a 6-coordinate geometry to one O(3), two equivalent O(2), and three equivalent O(1) atoms. The Zn(2)-O(3) bond length is 2.45 Å. There is one shorter (2.00 Å) and one longer (2.48 Å) Zn(2)-O(2) bond length. There are a spread of Zn(2)-O(1) bond distances ranging from 2.00-2.02 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Co(1) and three equivalent Zn(2) atoms to form OZn3Co tetrahedra that share  a cornercorner with one O(4)Zn2Co2 tetrahedra and corners with six equivalent O(1)Zn3Co tetrahedra. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Co(1) and two equivalent Zn(2) atoms. In the third O site, O(3) is bonded in a 5-coordinate geometry to two equivalent Co(1), one Zn(2), and two equivalent Zn(1) atoms. In the fourth O site, O(4) is bonded to two equivalent Co(1) and two equivalent Zn(1) atoms to form distorted OZn2Co2 tetrahedra that share corners with two equivalent O(4)Zn2Co2 tetrahedra and corners with two equivalent O(1)Zn3Co tetrahedra.