Pt3Cd crystallizes in the orthorhombic Cmmm space group. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to two equivalent Pt(1), eight equivalent Pt(2), and two equivalent Cd(1) atoms to form distorted PtCd2Pt10 cuboctahedra that share corners with twelve equivalent Pt(1)Cd2Pt10 cuboctahedra, edges with four equivalent Pt(1)Cd2Pt10 cuboctahedra, edges with four equivalent Cd(1)Cd2Pt10 cuboctahedra, edges with sixteen equivalent Pt(2)Cd4Pt8 cuboctahedra, faces with two equivalent Pt(1)Cd2Pt10 cuboctahedra, faces with eight equivalent Pt(2)Cd4Pt8 cuboctahedra, and faces with eight equivalent Cd(1)Cd2Pt10 cuboctahedra. In the second Pt site, Pt(2) is bonded to four equivalent Pt(1), four equivalent Pt(2), and four equivalent Cd(1) atoms to form distorted PtCd4Pt8 cuboctahedra that share corners with twelve equivalent Pt(2)Cd4Pt8 cuboctahedra, edges with eight equivalent Pt(1)Cd2Pt10 cuboctahedra, edges with eight equivalent Pt(2)Cd4Pt8 cuboctahedra, edges with eight equivalent Cd(1)Cd2Pt10 cuboctahedra, faces with four equivalent Pt(1)Cd2Pt10 cuboctahedra, faces with four equivalent Cd(1)Cd2Pt10 cuboctahedra, and faces with ten equivalent Pt(2)Cd4Pt8 cuboctahedra. Cd(1) is bonded to two equivalent Pt(1), eight equivalent Pt(2), and two equivalent Cd(1) atoms to form distorted CdCd2Pt10 cuboctahedra that share corners with twelve equivalent Cd(1)Cd2Pt10 cuboctahedra, edges with four equivalent Pt(1)Cd2Pt10 cuboctahedra, edges with four equivalent Cd(1)Cd2Pt10 cuboctahedra, edges with sixteen equivalent Pt(2)Cd4Pt8 cuboctahedra, faces with two equivalent Cd(1)Cd2Pt10 cuboctahedra, faces with eight equivalent Pt(1)Cd2Pt10 cuboctahedra, and faces with eight equivalent Pt(2)Cd4Pt8 cuboctahedra.
Pt3Cd crystallizes in the orthorhombic Cmmm space group. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to two equivalent Pt(1), eight equivalent Pt(2), and two equivalent Cd(1) atoms to form distorted PtCd2Pt10 cuboctahedra that share corners with twelve equivalent Pt(1)Cd2Pt10 cuboctahedra, edges with four equivalent Pt(1)Cd2Pt10 cuboctahedra, edges with four equivalent Cd(1)Cd2Pt10 cuboctahedra, edges with sixteen equivalent Pt(2)Cd4Pt8 cuboctahedra, faces with two equivalent Pt(1)Cd2Pt10 cuboctahedra, faces with eight equivalent Pt(2)Cd4Pt8 cuboctahedra, and faces with eight equivalent Cd(1)Cd2Pt10 cuboctahedra. Both Pt(1)-Pt(1) bond lengths are 2.83 Å. All Pt(1)-Pt(2) bond lengths are 2.82 Å. Both Pt(1)-Cd(1) bond lengths are 2.89 Å. In the second Pt site, Pt(2) is bonded to four equivalent Pt(1), four equivalent Pt(2), and four equivalent Cd(1) atoms to form distorted PtCd4Pt8 cuboctahedra that share corners with twelve equivalent Pt(2)Cd4Pt8 cuboctahedra, edges with eight equivalent Pt(1)Cd2Pt10 cuboctahedra, edges with eight equivalent Pt(2)Cd4Pt8 cuboctahedra, edges with eight equivalent Cd(1)Cd2Pt10 cuboctahedra, faces with four equivalent Pt(1)Cd2Pt10 cuboctahedra, faces with four equivalent Cd(1)Cd2Pt10 cuboctahedra, and faces with ten equivalent Pt(2)Cd4Pt8 cuboctahedra. There are two shorter (2.83 Å) and two longer (2.89 Å) Pt(2)-Pt(2) bond lengths. All Pt(2)-Cd(1) bond lengths are 2.82 Å. Cd(1) is bonded to two equivalent Pt(1), eight equivalent Pt(2), and two equivalent Cd(1) atoms to form distorted CdCd2Pt10 cuboctahedra that share corners with twelve equivalent Cd(1)Cd2Pt10 cuboctahedra, edges with four equivalent Pt(1)Cd2Pt10 cuboctahedra, edges with four equivalent Cd(1)Cd2Pt10 cuboctahedra, edges with sixteen equivalent Pt(2)Cd4Pt8 cuboctahedra, faces with two equivalent Cd(1)Cd2Pt10 cuboctahedra, faces with eight equivalent Pt(1)Cd2Pt10 cuboctahedra, and faces with eight equivalent Pt(2)Cd4Pt8 cuboctahedra. Both Cd(1)-Cd(1) bond lengths are 2.83 Å.