Ca3CdO4 is Caswellsilverite-like structured and crystallizes in the orthorhombic Cmmm space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form CaO6 octahedra that share corners with six equivalent Cd(1)O6 octahedra, edges with two equivalent Ca(1)O6 octahedra, edges with two equivalent Cd(1)O6 octahedra, and edges with eight equivalent Ca(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the second Ca site, Ca(2) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form CaO6 octahedra that share corners with six equivalent Ca(2)O6 octahedra, edges with four equivalent Ca(1)O6 octahedra, edges with four equivalent Ca(2)O6 octahedra, and edges with four equivalent Cd(1)O6 octahedra. The corner-sharing octahedral tilt angles are 1°. Cd(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form CdO6 octahedra that share corners with six equivalent Ca(1)O6 octahedra, edges with two equivalent Ca(1)O6 octahedra, edges with two equivalent Cd(1)O6 octahedra, and edges with eight equivalent Ca(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Ca(1), four equivalent Ca(2), and one Cd(1) atom to form OCa5Cd octahedra that share corners with six equivalent O(1)Ca5Cd octahedra, edges with four equivalent O(1)Ca5Cd octahedra, and edges with eight equivalent O(2)Ca4Cd2 octahedra. The corner-sharing octahedra are not tilted. In the second O site, O(2) is bonded to two equivalent Ca(1), two equivalent Ca(2), and two equivalent Cd(1) atoms to form OCa4Cd2 octahedra that share corners with six equivalent O(2)Ca4Cd2 octahedra, edges with four equivalent O(2)Ca4Cd2 octahedra, and edges with eight equivalent O(1)Ca5Cd octahedra. The corner-sharing octahedra are not tilted.
Ca3CdO4 is Caswellsilverite-like structured and crystallizes in the orthorhombic Cmmm space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form CaO6 octahedra that share corners with six equivalent Cd(1)O6 octahedra, edges with two equivalent Ca(1)O6 octahedra, edges with two equivalent Cd(1)O6 octahedra, and edges with eight equivalent Ca(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. Both Ca(1)-O(1) bond lengths are 2.36 Å. All Ca(1)-O(2) bond lengths are 2.38 Å. In the second Ca site, Ca(2) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form CaO6 octahedra that share corners with six equivalent Ca(2)O6 octahedra, edges with four equivalent Ca(1)O6 octahedra, edges with four equivalent Ca(2)O6 octahedra, and edges with four equivalent Cd(1)O6 octahedra. The corner-sharing octahedral tilt angles are 1°. Both Ca(2)-O(2) bond lengths are 2.39 Å. All Ca(2)-O(1) bond lengths are 2.39 Å. Cd(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form CdO6 octahedra that share corners with six equivalent Ca(1)O6 octahedra, edges with two equivalent Ca(1)O6 octahedra, edges with two equivalent Cd(1)O6 octahedra, and edges with eight equivalent Ca(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. Both Cd(1)-O(1) bond lengths are 2.41 Å. All Cd(1)-O(2) bond lengths are 2.40 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Ca(1), four equivalent Ca(2), and one Cd(1) atom to form OCa5Cd octahedra that share corners with six equivalent O(1)Ca5Cd octahedra, edges with four equivalent O(1)Ca5Cd octahedra, and edges with eight equivalent O(2)Ca4Cd2 octahedra. The corner-sharing octahedra are not tilted. In the second O site, O(2) is bonded to two equivalent Ca(1), two equivalent Ca(2), and two equivalent Cd(1) atoms to form OCa4Cd2 octahedra that share corners with six equivalent O(2)Ca4Cd2 octahedra, edges with four equivalent O(2)Ca4Cd2 octahedra, and edges with eight equivalent O(1)Ca5Cd octahedra. The corner-sharing octahedra are not tilted.