Ac3Ce is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Ac(1) is bonded to eight equivalent Ac(1) and four equivalent Ce(1) atoms to form AcAc8Ce4 cuboctahedra that share corners with twelve equivalent Ac(1)Ac8Ce4 cuboctahedra, edges with eight equivalent Ce(1)Ac12 cuboctahedra, edges with sixteen equivalent Ac(1)Ac8Ce4 cuboctahedra, faces with four equivalent Ce(1)Ac12 cuboctahedra, and faces with fourteen equivalent Ac(1)Ac8Ce4 cuboctahedra. Ce(1) is bonded to twelve equivalent Ac(1) atoms to form CeAc12 cuboctahedra that share corners with twelve equivalent Ce(1)Ac12 cuboctahedra, edges with twenty-four equivalent Ac(1)Ac8Ce4 cuboctahedra, faces with six equivalent Ce(1)Ac12 cuboctahedra, and faces with twelve equivalent Ac(1)Ac8Ce4 cuboctahedra.
Ac3Ce is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Ac(1) is bonded to eight equivalent Ac(1) and four equivalent Ce(1) atoms to form AcAc8Ce4 cuboctahedra that share corners with twelve equivalent Ac(1)Ac8Ce4 cuboctahedra, edges with eight equivalent Ce(1)Ac12 cuboctahedra, edges with sixteen equivalent Ac(1)Ac8Ce4 cuboctahedra, faces with four equivalent Ce(1)Ac12 cuboctahedra, and faces with fourteen equivalent Ac(1)Ac8Ce4 cuboctahedra. All Ac(1)-Ac(1) bond lengths are 3.83 Å. All Ac(1)-Ce(1) bond lengths are 3.83 Å. Ce(1) is bonded to twelve equivalent Ac(1) atoms to form CeAc12 cuboctahedra that share corners with twelve equivalent Ce(1)Ac12 cuboctahedra, edges with twenty-four equivalent Ac(1)Ac8Ce4 cuboctahedra, faces with six equivalent Ce(1)Ac12 cuboctahedra, and faces with twelve equivalent Ac(1)Ac8Ce4 cuboctahedra.