MgCd2(CoO2)4 is Aluminum carbonitride-derived structured and crystallizes in the orthorhombic Imm2 space group. Mg(1) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form distorted MgO4 tetrahedra that share corners with six equivalent Co(2)O6 octahedra, corners with two equivalent Cd(2)O4 tetrahedra, and  an edgeedge with one Cd(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 29-58°. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 5-coordinate geometry to one O(4), two equivalent O(1), and two equivalent O(2) atoms. In the second Co site, Co(2) is bonded to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms to form CoO6 octahedra that share corners with three equivalent Mg(1)O4 tetrahedra, corners with three equivalent Cd(1)O4 tetrahedra, corners with three equivalent Cd(2)O4 tetrahedra, and edges with two equivalent Co(2)O6 octahedra. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded to two equivalent O(1) and two equivalent O(3) atoms to form distorted CdO4 tetrahedra that share corners with six equivalent Co(2)O6 octahedra and  an edgeedge with one Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 60-70°. In the second Cd site, Cd(2) is bonded to two equivalent O(2) and two equivalent O(4) atoms to form CdO4 tetrahedra that share corners with six equivalent Co(2)O6 octahedra and corners with two equivalent Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 59-66°. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Co(2), two equivalent Co(1), and one Cd(1) atom to form OCdCo3 tetrahedra that share  a cornercorner with one O(1)CdCo3 tetrahedra, corners with four equivalent O(4)CdCo3 tetrahedra, corners with five equivalent O(2)MgCdCo3 trigonal bipyramids, and  an edgeedge with one O(1)CdCo3 tetrahedra. In the second O site, O(2) is bonded to one Mg(1), one Co(2), two equivalent Co(1), and one Cd(2) atom to form distorted OMgCdCo3 trigonal bipyramids that share corners with two equivalent O(4)CdCo3 tetrahedra, corners with five equivalent O(1)CdCo3 tetrahedra,  a cornercorner with one O(2)MgCdCo3 trigonal bipyramid, edges with two equivalent O(4)CdCo3 tetrahedra, and  a faceface with one O(2)MgCdCo3 trigonal bipyramid. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Mg(1), two equivalent Co(2), and one Cd(1) atom. In the fourth O site, O(4) is bonded to one Co(1), two equivalent Co(2), and one Cd(2) atom to form distorted OCdCo3 tetrahedra that share  a cornercorner with one O(4)CdCo3 tetrahedra, corners with four equivalent O(1)CdCo3 tetrahedra, corners with two equivalent O(2)MgCdCo3 trigonal bipyramids,  an edgeedge with one O(4)CdCo3 tetrahedra, and edges with two equivalent O(2)MgCdCo3 trigonal bipyramids.
MgCd2(CoO2)4 is Aluminum carbonitride-derived structured and crystallizes in the orthorhombic Imm2 space group. Mg(1) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form distorted MgO4 tetrahedra that share corners with six equivalent Co(2)O6 octahedra, corners with two equivalent Cd(2)O4 tetrahedra, and  an edgeedge with one Cd(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 29-58°. Both Mg(1)-O(2) bond lengths are 2.10 Å. Both Mg(1)-O(3) bond lengths are 1.98 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 5-coordinate geometry to one O(4), two equivalent O(1), and two equivalent O(2) atoms. The Co(1)-O(4) bond length is 2.04 Å. Both Co(1)-O(1) bond lengths are 1.99 Å. Both Co(1)-O(2) bond lengths are 2.13 Å. In the second Co site, Co(2) is bonded to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms to form CoO6 octahedra that share corners with three equivalent Mg(1)O4 tetrahedra, corners with three equivalent Cd(1)O4 tetrahedra, corners with three equivalent Cd(2)O4 tetrahedra, and edges with two equivalent Co(2)O6 octahedra. The Co(2)-O(1) bond length is 1.95 Å. The Co(2)-O(2) bond length is 2.02 Å. Both Co(2)-O(3) bond lengths are 2.04 Å. Both Co(2)-O(4) bond lengths are 2.01 Å. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded to two equivalent O(1) and two equivalent O(3) atoms to form distorted CdO4 tetrahedra that share corners with six equivalent Co(2)O6 octahedra and  an edgeedge with one Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 60-70°. Both Cd(1)-O(1) bond lengths are 2.08 Å. Both Cd(1)-O(3) bond lengths are 2.34 Å. In the second Cd site, Cd(2) is bonded to two equivalent O(2) and two equivalent O(4) atoms to form CdO4 tetrahedra that share corners with six equivalent Co(2)O6 octahedra and corners with two equivalent Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 59-66°. Both Cd(2)-O(2) bond lengths are 2.17 Å. Both Cd(2)-O(4) bond lengths are 2.24 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Co(2), two equivalent Co(1), and one Cd(1) atom to form OCdCo3 tetrahedra that share  a cornercorner with one O(1)CdCo3 tetrahedra, corners with four equivalent O(4)CdCo3 tetrahedra, corners with five equivalent O(2)MgCdCo3 trigonal bipyramids, and  an edgeedge with one O(1)CdCo3 tetrahedra. In the second O site, O(2) is bonded to one Mg(1), one Co(2), two equivalent Co(1), and one Cd(2) atom to form distorted OMgCdCo3 trigonal bipyramids that share corners with two equivalent O(4)CdCo3 tetrahedra, corners with five equivalent O(1)CdCo3 tetrahedra,  a cornercorner with one O(2)MgCdCo3 trigonal bipyramid, edges with two equivalent O(4)CdCo3 tetrahedra, and  a faceface with one O(2)MgCdCo3 trigonal bipyramid. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Mg(1), two equivalent Co(2), and one Cd(1) atom. In the fourth O site, O(4) is bonded to one Co(1), two equivalent Co(2), and one Cd(2) atom to form distorted OCdCo3 tetrahedra that share  a cornercorner with one O(4)CdCo3 tetrahedra, corners with four equivalent O(1)CdCo3 tetrahedra, corners with two equivalent O(2)MgCdCo3 trigonal bipyramids,  an edgeedge with one O(4)CdCo3 tetrahedra, and edges with two equivalent O(2)MgCdCo3 trigonal bipyramids.