Gd3Cd is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Gd(1) is bonded to eight equivalent Gd(1) and four equivalent Cd(1) atoms to form distorted GdGd8Cd4 cuboctahedra that share corners with four equivalent Cd(1)Gd12 cuboctahedra, corners with fourteen equivalent Gd(1)Gd8Cd4 cuboctahedra, edges with six equivalent Cd(1)Gd12 cuboctahedra, edges with twelve equivalent Gd(1)Gd8Cd4 cuboctahedra, faces with four equivalent Cd(1)Gd12 cuboctahedra, and faces with sixteen equivalent Gd(1)Gd8Cd4 cuboctahedra. Cd(1) is bonded to twelve equivalent Gd(1) atoms to form CdGd12 cuboctahedra that share corners with six equivalent Cd(1)Gd12 cuboctahedra, corners with twelve equivalent Gd(1)Gd8Cd4 cuboctahedra, edges with eighteen equivalent Gd(1)Gd8Cd4 cuboctahedra, faces with eight equivalent Cd(1)Gd12 cuboctahedra, and faces with twelve equivalent Gd(1)Gd8Cd4 cuboctahedra.
Gd3Cd is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Gd(1) is bonded to eight equivalent Gd(1) and four equivalent Cd(1) atoms to form distorted GdGd8Cd4 cuboctahedra that share corners with four equivalent Cd(1)Gd12 cuboctahedra, corners with fourteen equivalent Gd(1)Gd8Cd4 cuboctahedra, edges with six equivalent Cd(1)Gd12 cuboctahedra, edges with twelve equivalent Gd(1)Gd8Cd4 cuboctahedra, faces with four equivalent Cd(1)Gd12 cuboctahedra, and faces with sixteen equivalent Gd(1)Gd8Cd4 cuboctahedra. There are a spread of Gd(1)-Gd(1) bond distances ranging from 3.40-3.56 Å. There are two shorter (3.45 Å) and two longer (3.48 Å) Gd(1)-Cd(1) bond lengths. Cd(1) is bonded to twelve equivalent Gd(1) atoms to form CdGd12 cuboctahedra that share corners with six equivalent Cd(1)Gd12 cuboctahedra, corners with twelve equivalent Gd(1)Gd8Cd4 cuboctahedra, edges with eighteen equivalent Gd(1)Gd8Cd4 cuboctahedra, faces with eight equivalent Cd(1)Gd12 cuboctahedra, and faces with twelve equivalent Gd(1)Gd8Cd4 cuboctahedra.