Th3B 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 B(1) atoms to form distorted ThTh8B4 cuboctahedra that share corners with twelve equivalent Th(1)Th8B4 cuboctahedra, edges with eight equivalent B(1)Th12 cuboctahedra, edges with sixteen equivalent Th(1)Th8B4 cuboctahedra, faces with four equivalent B(1)Th12 cuboctahedra, and faces with fourteen equivalent Th(1)Th8B4 cuboctahedra. B(1) is bonded to twelve equivalent Th(1) atoms to form BTh12 cuboctahedra that share corners with twelve equivalent B(1)Th12 cuboctahedra, edges with twenty-four equivalent Th(1)Th8B4 cuboctahedra, faces with six equivalent B(1)Th12 cuboctahedra, and faces with twelve equivalent Th(1)Th8B4 cuboctahedra.
Th3B 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 B(1) atoms to form distorted ThTh8B4 cuboctahedra that share corners with twelve equivalent Th(1)Th8B4 cuboctahedra, edges with eight equivalent B(1)Th12 cuboctahedra, edges with sixteen equivalent Th(1)Th8B4 cuboctahedra, faces with four equivalent B(1)Th12 cuboctahedra, and faces with fourteen equivalent Th(1)Th8B4 cuboctahedra. All Th(1)-Th(1) bond lengths are 3.30 Å. All Th(1)-B(1) bond lengths are 3.30 Å. B(1) is bonded to twelve equivalent Th(1) atoms to form BTh12 cuboctahedra that share corners with twelve equivalent B(1)Th12 cuboctahedra, edges with twenty-four equivalent Th(1)Th8B4 cuboctahedra, faces with six equivalent B(1)Th12 cuboctahedra, and faces with twelve equivalent Th(1)Th8B4 cuboctahedra.