BaBe13 crystallizes in the cubic Fm-3c space group. Ba(1) is bonded in a 24-coordinate geometry to twenty-four equivalent Be(1) atoms. There are two inequivalent Be sites. In the first Be site, Be(1) is bonded to two equivalent Ba(1), one Be(2), and nine equivalent Be(1) atoms to form BeBa2Be10 cuboctahedra that share  a cornercorner with one Be(2)Be12 cuboctahedra, corners with twenty-seven equivalent Be(1)Ba2Be10 cuboctahedra, edges with eight equivalent Be(1)Ba2Be10 cuboctahedra, faces with two equivalent Be(2)Be12 cuboctahedra, and faces with twenty-three equivalent Be(1)Ba2Be10 cuboctahedra. In the second Be site, Be(2) is bonded to twelve equivalent Be(1) atoms to form a mixture of corner and face-sharing BeBe12 cuboctahedra.
BaBe13 crystallizes in the cubic Fm-3c space group. Ba(1) is bonded in a 24-coordinate geometry to twenty-four equivalent Be(1) atoms. All Ba(1)-Be(1) bond lengths are 3.17 Å. There are two inequivalent Be sites. In the first Be site, Be(1) is bonded to two equivalent Ba(1), one Be(2), and nine equivalent Be(1) atoms to form BeBa2Be10 cuboctahedra that share  a cornercorner with one Be(2)Be12 cuboctahedra, corners with twenty-seven equivalent Be(1)Ba2Be10 cuboctahedra, edges with eight equivalent Be(1)Ba2Be10 cuboctahedra, faces with two equivalent Be(2)Be12 cuboctahedra, and faces with twenty-three equivalent Be(1)Ba2Be10 cuboctahedra. The Be(1)-Be(2) bond length is 2.18 Å. There are seven shorter (2.29 Å) and two longer (2.43 Å) Be(1)-Be(1) bond lengths. In the second Be site, Be(2) is bonded to twelve equivalent Be(1) atoms to form a mixture of corner and face-sharing BeBe12 cuboctahedra.