BaCd2Sb2 crystallizes in the trigonal P-3m1 space group. Ba(1) is bonded to six equivalent Sb(1) atoms to form BaSb6 octahedra that share corners with twelve equivalent Cd(1)Sb4 tetrahedra, edges with six equivalent Ba(1)Sb6 octahedra, and edges with six equivalent Cd(1)Sb4 tetrahedra. Cd(1) is bonded to four equivalent Sb(1) atoms to form CdSb4 tetrahedra that share corners with six equivalent Ba(1)Sb6 octahedra, corners with six equivalent Cd(1)Sb4 tetrahedra, edges with three equivalent Ba(1)Sb6 octahedra, and edges with three equivalent Cd(1)Sb4 tetrahedra. The corner-sharing octahedral tilt angles range from 21-52°. Sb(1) is bonded to three equivalent Ba(1) and four equivalent Cd(1) atoms to form a mixture of distorted edge and corner-sharing SbBa3Cd4 pentagonal bipyramids.
BaCd2Sb2 crystallizes in the trigonal P-3m1 space group. Ba(1) is bonded to six equivalent Sb(1) atoms to form BaSb6 octahedra that share corners with twelve equivalent Cd(1)Sb4 tetrahedra, edges with six equivalent Ba(1)Sb6 octahedra, and edges with six equivalent Cd(1)Sb4 tetrahedra. All Ba(1)-Sb(1) bond lengths are 3.53 Å. Cd(1) is bonded to four equivalent Sb(1) atoms to form CdSb4 tetrahedra that share corners with six equivalent Ba(1)Sb6 octahedra, corners with six equivalent Cd(1)Sb4 tetrahedra, edges with three equivalent Ba(1)Sb6 octahedra, and edges with three equivalent Cd(1)Sb4 tetrahedra. The corner-sharing octahedral tilt angles range from 21-52°. There are three shorter (2.91 Å) and one longer (3.00 Å) Cd(1)-Sb(1) bond length. Sb(1) is bonded to three equivalent Ba(1) and four equivalent Cd(1) atoms to form a mixture of distorted edge and corner-sharing SbBa3Cd4 pentagonal bipyramids.