Ca2CdN2 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form distorted CaN4 tetrahedra that share corners with six equivalent Ca(2)N5 square pyramids, corners with two equivalent Ca(1)N4 tetrahedra, edges with two equivalent Ca(2)N5 square pyramids, and  an edgeedge with one Ca(1)N4 tetrahedra. In the second Ca site, Ca(2) is bonded to two equivalent N(1) and three equivalent N(2) atoms to form distorted CaN5 square pyramids that share corners with two equivalent Ca(2)N5 square pyramids, corners with six equivalent Ca(1)N4 tetrahedra, edges with three equivalent Ca(2)N5 square pyramids, and edges with two equivalent Ca(1)N4 tetrahedra. Cd(1) is bonded in a distorted trigonal non-coplanar geometry to one N(2) and two equivalent N(1) atoms. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 6-coordinate geometry to two equivalent Ca(1), two equivalent Ca(2), and two equivalent Cd(1) atoms. In the second N site, N(2) is bonded to two equivalent Ca(1), three equivalent Ca(2), and one Cd(1) atom to form a mixture of corner and edge-sharing NCa5Cd octahedra. The corner-sharing octahedral tilt angles are 13°.
Ca2CdN2 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form distorted CaN4 tetrahedra that share corners with six equivalent Ca(2)N5 square pyramids, corners with two equivalent Ca(1)N4 tetrahedra, edges with two equivalent Ca(2)N5 square pyramids, and  an edgeedge with one Ca(1)N4 tetrahedra. There is one shorter (2.39 Å) and one longer (2.66 Å) Ca(1)-N(1) bond length. Both Ca(1)-N(2) bond lengths are 2.36 Å. In the second Ca site, Ca(2) is bonded to two equivalent N(1) and three equivalent N(2) atoms to form distorted CaN5 square pyramids that share corners with two equivalent Ca(2)N5 square pyramids, corners with six equivalent Ca(1)N4 tetrahedra, edges with three equivalent Ca(2)N5 square pyramids, and edges with two equivalent Ca(1)N4 tetrahedra. There is one shorter (2.62 Å) and one longer (2.67 Å) Ca(2)-N(1) bond length. There are a spread of Ca(2)-N(2) bond distances ranging from 2.49-2.61 Å. Cd(1) is bonded in a distorted trigonal non-coplanar geometry to one N(2) and two equivalent N(1) atoms. The Cd(1)-N(2) bond length is 2.25 Å. There is one shorter (2.26 Å) and one longer (2.33 Å) Cd(1)-N(1) bond length. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 6-coordinate geometry to two equivalent Ca(1), two equivalent Ca(2), and two equivalent Cd(1) atoms. In the second N site, N(2) is bonded to two equivalent Ca(1), three equivalent Ca(2), and one Cd(1) atom to form a mixture of corner and edge-sharing NCa5Cd octahedra. The corner-sharing octahedral tilt angles are 13°.