Pa3Yb is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Pa(1) is bonded to eight equivalent Pa(1) and four equivalent Yb(1) atoms to form distorted PaYb4Pa8 cuboctahedra that share corners with twelve equivalent Pa(1)Yb4Pa8 cuboctahedra, edges with eight equivalent Yb(1)Pa12 cuboctahedra, edges with sixteen equivalent Pa(1)Yb4Pa8 cuboctahedra, faces with four equivalent Yb(1)Pa12 cuboctahedra, and faces with fourteen equivalent Pa(1)Yb4Pa8 cuboctahedra. Yb(1) is bonded to twelve equivalent Pa(1) atoms to form YbPa12 cuboctahedra that share corners with twelve equivalent Yb(1)Pa12 cuboctahedra, edges with twenty-four equivalent Pa(1)Yb4Pa8 cuboctahedra, faces with six equivalent Yb(1)Pa12 cuboctahedra, and faces with twelve equivalent Pa(1)Yb4Pa8 cuboctahedra.
Pa3Yb is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Pa(1) is bonded to eight equivalent Pa(1) and four equivalent Yb(1) atoms to form distorted PaYb4Pa8 cuboctahedra that share corners with twelve equivalent Pa(1)Yb4Pa8 cuboctahedra, edges with eight equivalent Yb(1)Pa12 cuboctahedra, edges with sixteen equivalent Pa(1)Yb4Pa8 cuboctahedra, faces with four equivalent Yb(1)Pa12 cuboctahedra, and faces with fourteen equivalent Pa(1)Yb4Pa8 cuboctahedra. All Pa(1)-Pa(1) bond lengths are 3.30 Å. All Pa(1)-Yb(1) bond lengths are 3.30 Å. Yb(1) is bonded to twelve equivalent Pa(1) atoms to form YbPa12 cuboctahedra that share corners with twelve equivalent Yb(1)Pa12 cuboctahedra, edges with twenty-four equivalent Pa(1)Yb4Pa8 cuboctahedra, faces with six equivalent Yb(1)Pa12 cuboctahedra, and faces with twelve equivalent Pa(1)Yb4Pa8 cuboctahedra.