Th3Gd is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Th(1) is bonded to eight equivalent Th(1) and four equivalent Gd(1) atoms to form ThGd4Th8 cuboctahedra that share corners with twelve equivalent Th(1)Gd4Th8 cuboctahedra, edges with eight equivalent Gd(1)Th12 cuboctahedra, edges with sixteen equivalent Th(1)Gd4Th8 cuboctahedra, faces with four equivalent Gd(1)Th12 cuboctahedra, and faces with fourteen equivalent Th(1)Gd4Th8 cuboctahedra. Gd(1) is bonded to twelve equivalent Th(1) atoms to form GdTh12 cuboctahedra that share corners with twelve equivalent Gd(1)Th12 cuboctahedra, edges with twenty-four equivalent Th(1)Gd4Th8 cuboctahedra, faces with six equivalent Gd(1)Th12 cuboctahedra, and faces with twelve equivalent Th(1)Gd4Th8 cuboctahedra.
Th3Gd is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Th(1) is bonded to eight equivalent Th(1) and four equivalent Gd(1) atoms to form ThGd4Th8 cuboctahedra that share corners with twelve equivalent Th(1)Gd4Th8 cuboctahedra, edges with eight equivalent Gd(1)Th12 cuboctahedra, edges with sixteen equivalent Th(1)Gd4Th8 cuboctahedra, faces with four equivalent Gd(1)Th12 cuboctahedra, and faces with fourteen equivalent Th(1)Gd4Th8 cuboctahedra. All Th(1)-Th(1) bond lengths are 3.67 Å. All Th(1)-Gd(1) bond lengths are 3.67 Å. Gd(1) is bonded to twelve equivalent Th(1) atoms to form GdTh12 cuboctahedra that share corners with twelve equivalent Gd(1)Th12 cuboctahedra, edges with twenty-four equivalent Th(1)Gd4Th8 cuboctahedra, faces with six equivalent Gd(1)Th12 cuboctahedra, and faces with twelve equivalent Th(1)Gd4Th8 cuboctahedra.