The material described by Ce2Co16Cu crystallizes in the monoclinic C2/m space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 20-coordinate geometry to one Co(11), one Co(12), one Co(5), one Co(7), one Co(9), two equivalent Co(1), two equivalent Co(10), two equivalent Co(2), two equivalent Co(3), two equivalent Co(4), two equivalent Co(6), two equivalent Co(8), and one Cu(1) atom. In the second Ce site, Ce(2) is bonded in a 18-coordinate geometry to two equivalent Co(1), two equivalent Co(2), two equivalent Co(3), two equivalent Co(5), two equivalent Co(7), four equivalent Co(4), and four equivalent Co(6) atoms. There are twelve inequivalent Co sites. In the first Co site, Co(8) is bonded to two equivalent Ce(1), two equivalent Co(1), two equivalent Co(12), two equivalent Co(3), two equivalent Co(4), and two equivalent Co(5) atoms to form CoCe2Co10 cuboctahedra that share corners with two equivalent Co(10)Ce2Co8Cu2 cuboctahedra, corners with two equivalent Co(11)Ce2Co8Cu2 cuboctahedra, corners with two equivalent Co(7)Ce3Co8Cu cuboctahedra, corners with four equivalent Co(6)Ce3Co8Cu cuboctahedra, corners with four equivalent Co(4)Ce3Co9 cuboctahedra, edges with two equivalent Co(6)Ce3Co8Cu cuboctahedra, edges with two equivalent Co(7)Ce3Co8Cu cuboctahedra, edges with two equivalent Co(4)Ce3Co9 cuboctahedra, faces with two equivalent Co(8)Ce2Co10 cuboctahedra, faces with two equivalent Co(9)Ce2Co10 cuboctahedra, faces with two equivalent Co(10)Ce2Co8Cu2 cuboctahedra, faces with two equivalent Co(4)Ce3Co9 cuboctahedra, and faces with two equivalent Co(5)Ce3Co9 cuboctahedra. In the second Co site, Co(9) is bonded to two equivalent Ce(1), two equivalent Co(12), four equivalent Co(2), and four equivalent Co(4) atoms to form CoCe2Co10 cuboctahedra that share corners with two equivalent Co(7)Ce3Co8Cu cuboctahedra, corners with four equivalent Co(10)Ce2Co8Cu2 cuboctahedra, corners with four equivalent Co(6)Ce3Co8Cu cuboctahedra, corners with four equivalent Co(5)Ce3Co9 cuboctahedra, edges with two equivalent Co(5)Ce3Co9 cuboctahedra, edges with four equivalent Co(6)Ce3Co8Cu cuboctahedra, faces with two equivalent Co(11)Ce2Co8Cu2 cuboctahedra, faces with four equivalent Co(8)Ce2Co10 cuboctahedra, and faces with four equivalent Co(4)Ce3Co9 cuboctahedra. In the third Co site, Co(10) is bonded to two equivalent Ce(1), two equivalent Co(1), two equivalent Co(3), two equivalent Co(6), two equivalent Co(7), and two equivalent Cu(1) atoms to form CoCe2Co8Cu2 cuboctahedra that share corners with two equivalent Co(8)Ce2Co10 cuboctahedra, corners with two equivalent Co(9)Ce2Co10 cuboctahedra, corners with two equivalent Co(5)Ce3Co9 cuboctahedra, corners with four equivalent Co(6)Ce3Co8Cu cuboctahedra, corners with four equivalent Co(4)Ce3Co9 cuboctahedra, edges with two equivalent Co(6)Ce3Co8Cu cuboctahedra, edges with two equivalent Co(4)Ce3Co9 cuboctahedra, edges with two equivalent Co(5)Ce3Co9 cuboctahedra, faces with two equivalent Co(8)Ce2Co10 cuboctahedra, faces with two equivalent Co(10)Ce2Co8Cu2 cuboctahedra, faces with two equivalent Co(11)Ce2Co8Cu2 cuboctahedra, faces with two equivalent Co(6)Ce3Co8Cu cuboctahedra, and faces with two equivalent Co(7)Ce3Co8Cu cuboctahedra. In the fourth Co site, Co(11) is bonded to two equivalent Ce(1), four equivalent Co(2), four equivalent Co(6), and two equivalent Cu(1) atoms to form CoCe2Co8Cu2 cuboctahedra that share corners with two equivalent Co(5)Ce3Co9 cuboctahedra, corners with four equivalent Co(8)Ce2Co10 cuboctahedra, corners with four equivalent Co(7)Ce3Co8Cu cuboctahedra, corners with four equivalent Co(4)Ce3Co9 cuboctahedra, edges with two equivalent Co(7)Ce3Co8Cu cuboctahedra, edges with four equivalent Co(4)Ce3Co9 cuboctahedra, faces with two equivalent Co(9)Ce2Co10 cuboctahedra, faces with four equivalent Co(10)Ce2Co8Cu2 cuboctahedra, and faces with four equivalent Co(6)Ce3Co8Cu cuboctahedra. In the fifth Co site, Co(12) is bonded in a 14-coordinate geometry to one Ce(1), one Co(5), one Co(9), two equivalent Co(1), two equivalent Co(2), two equivalent Co(3), two equivalent Co(4), two equivalent Co(8), and one Cu(1) atom. In the sixth Co site, Co(1) is bonded in a 12-coordinate geometry to one Ce(1), one Ce(2), one Co(1), one Co(10), one Co(12), one Co(3), one Co(4), one Co(5), one Co(6), one Co(7), one Co(8), and one Cu(1) atom. In the seventh Co site, Co(2) is bonded in a 12-coordinate geometry to one Ce(1), one Ce(2), one Co(11), one Co(12), one Co(2), one Co(3), one Co(9), two equivalent Co(4), two equivalent Co(6), and one Cu(1) atom. In the eighth Co site, Co(3) is bonded in a 12-coordinate geometry to one Ce(1), one Ce(2), one Co(1), one Co(10), one Co(12), one Co(2), one Co(4), one Co(5), one Co(6), one Co(7), one Co(8), and one Cu(1) atom. In the ninth Co site, Co(4) is bonded to one Ce(1), two equivalent Ce(2), one Co(1), one Co(12), one Co(3), one Co(4), one Co(5), one Co(8), one Co(9), and two equivalent Co(2) atoms to form distorted CoCe3Co9 cuboctahedra that share  a cornercorner with one Co(11)Ce2Co8Cu2 cuboctahedra, corners with two equivalent Co(8)Ce2Co10 cuboctahedra, corners with two equivalent Co(10)Ce2Co8Cu2 cuboctahedra, corners with two equivalent Co(4)Ce3Co9 cuboctahedra, corners with three equivalent Co(7)Ce3Co8Cu cuboctahedra, corners with five equivalent Co(6)Ce3Co8Cu cuboctahedra,  an edgeedge with one Co(8)Ce2Co10 cuboctahedra,  an edgeedge with one Co(10)Ce2Co8Cu2 cuboctahedra,  an edgeedge with one Co(11)Ce2Co8Cu2 cuboctahedra,  an edgeedge with one Co(4)Ce3Co9 cuboctahedra, edges with two equivalent Co(6)Ce3Co8Cu cuboctahedra, edges with two equivalent Co(7)Ce3Co8Cu cuboctahedra,  a faceface with one Co(8)Ce2Co10 cuboctahedra,  a faceface with one Co(9)Ce2Co10 cuboctahedra, faces with two equivalent Co(6)Ce3Co8Cu cuboctahedra, faces with three equivalent Co(4)Ce3Co9 cuboctahedra, and faces with three equivalent Co(5)Ce3Co9 cuboctahedra. In the tenth Co site, Co(5) is bonded to one Ce(1), two equivalent Ce(2), one Co(12), two equivalent Co(1), two equivalent Co(3), two equivalent Co(4), and two equivalent Co(8) atoms to form distorted CoCe3Co9 cuboctahedra that share  a cornercorner with one Co(11)Ce2Co8Cu2 cuboctahedra, corners with two equivalent Co(9)Ce2Co10 cuboctahedra, corners with two equivalent Co(10)Ce2Co8Cu2 cuboctahedra, corners with two equivalent Co(7)Ce3Co8Cu cuboctahedra, corners with two equivalent Co(5)Ce3Co9 cuboctahedra, corners with six equivalent Co(6)Ce3Co8Cu cuboctahedra,  an edgeedge with one Co(9)Ce2Co10 cuboctahedra,  an edgeedge with one Co(5)Ce3Co9 cuboctahedra, edges with two equivalent Co(10)Ce2Co8Cu2 cuboctahedra, edges with four equivalent Co(6)Ce3Co8Cu cuboctahedra, faces with two equivalent Co(8)Ce2Co10 cuboctahedra, faces with two equivalent Co(7)Ce3Co8Cu cuboctahedra, and faces with six equivalent Co(4)Ce3Co9 cuboctahedra. In the eleventh Co site, Co(6) is bonded to one Ce(1), two equivalent Ce(2), one Co(1), one Co(10), one Co(11), one Co(3), one Co(6), one Co(7), two equivalent Co(2), and one Cu(1) atom to form distorted CoCe3Co8Cu cuboctahedra that share  a cornercorner with one Co(9)Ce2Co10 cuboctahedra, corners with two equivalent Co(8)Ce2Co10 cuboctahedra, corners with two equivalent Co(10)Ce2Co8Cu2 cuboctahedra, corners with two equivalent Co(6)Ce3Co8Cu cuboctahedra, corners with three equivalent Co(5)Ce3Co9 cuboctahedra, corners with five equivalent Co(4)Ce3Co9 cuboctahedra,  an edgeedge with one Co(8)Ce2Co10 cuboctahedra,  an edgeedge with one Co(9)Ce2Co10 cuboctahedra,  an edgeedge with one Co(10)Ce2Co8Cu2 cuboctahedra,  an edgeedge with one Co(6)Ce3Co8Cu cuboctahedra, edges with two equivalent Co(4)Ce3Co9 cuboctahedra, edges with two equivalent Co(5)Ce3Co9 cuboctahedra,  a faceface with one Co(10)Ce2Co8Cu2 cuboctahedra,  a faceface with one Co(11)Ce2Co8Cu2 cuboctahedra, faces with two equivalent Co(4)Ce3Co9 cuboctahedra, faces with three equivalent Co(6)Ce3Co8Cu cuboctahedra, and faces with three equivalent Co(7)Ce3Co8Cu cuboctahedra. In the twelfth Co site, Co(7) is bonded to one Ce(1), two equivalent Ce(2), two equivalent Co(1), two equivalent Co(10), two equivalent Co(3), two equivalent Co(6), and one Cu(1) atom to form distorted CoCe3Co8Cu cuboctahedra that share  a cornercorner with one Co(9)Ce2Co10 cuboctahedra, corners with two equivalent Co(8)Ce2Co10 cuboctahedra, corners with two equivalent Co(11)Ce2Co8Cu2 cuboctahedra, corners with two equivalent Co(7)Ce3Co8Cu cuboctahedra, corners with two equivalent Co(5)Ce3Co9 cuboctahedra, corners with six equivalent Co(4)Ce3Co9 cuboctahedra,  an edgeedge with one Co(11)Ce2Co8Cu2 cuboctahedra,  an edgeedge with one Co(7)Ce3Co8Cu cuboctahedra, edges with two equivalent Co(8)Ce2Co10 cuboctahedra, edges with four equivalent Co(4)Ce3Co9 cuboctahedra, faces with two equivalent Co(10)Ce2Co8Cu2 cuboctahedra, faces with two equivalent Co(5)Ce3Co9 cuboctahedra, and faces with six equivalent Co(6)Ce3Co8Cu cuboctahedra. Cu(1) is bonded in a 14-coordinate geometry to one Ce(1), one Co(11), one Co(12), one Co(7), two equivalent Co(1), two equivalent Co(10), two equivalent Co(2), two equivalent Co(3), and two equivalent Co(6) atoms. is represented by the CIF file [CIF]
data_Ce2Co16Cu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.122
_cell_length_b   8.357
_cell_length_c   8.357
_cell_angle_alpha   119.966
_cell_angle_beta   90.010
_cell_angle_gamma   89.990
_symmetry_Int_Tables_number   1
_cell_volume   491.448
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Ce  Ce0  1  0.247  0.666  0.334  1.0
  Ce  Ce1  1  0.753  0.334  0.666  1.0
  Ce  Ce2  1  0.748  0.000  1.000  1.0
  Ce  Ce3  1  0.252  1.000  0.000  1.0
  Co  Co4  1  0.749  0.671  0.047  1.0
  Co  Co5  1  0.749  0.376  0.329  1.0
  Co  Co6  1  0.749  0.953  0.624  1.0
  Co  Co7  1  0.749  0.376  0.047  1.0
  Co  Co8  1  0.749  0.953  0.329  1.0
  Co  Co9  1  0.749  0.671  0.624  1.0
  Co  Co10  1  0.251  0.329  0.953  1.0
  Co  Co11  1  0.251  0.624  0.671  1.0
  Co  Co12  1  0.251  0.047  0.376  1.0
  Co  Co13  1  0.251  0.624  0.953  1.0
  Co  Co14  1  0.251  0.047  0.671  1.0
  Co  Co15  1  0.251  0.329  0.376  1.0
  Co  Co16  1  0.478  0.833  0.667  1.0
  Co  Co17  1  0.478  0.834  0.166  1.0
  Co  Co18  1  0.478  0.333  0.167  1.0
  Co  Co19  1  0.522  0.167  0.333  1.0
  Co  Co20  1  0.522  0.166  0.834  1.0
  Co  Co21  1  0.522  0.667  0.833  1.0
  Co  Co22  1  0.982  0.164  0.328  1.0
  Co  Co23  1  0.982  0.164  0.836  1.0
  Co  Co24  1  0.982  0.672  0.836  1.0
  Co  Co25  1  0.018  0.836  0.672  1.0
  Co  Co26  1  0.018  0.836  0.164  1.0
  Co  Co27  1  0.018  0.328  0.164  1.0
  Co  Co28  1  0.500  0.500  0.000  1.0
  Co  Co29  1  0.500  0.500  0.500  1.0
  Co  Co30  1  0.500  0.000  0.500  1.0
  Co  Co31  1  0.000  0.500  0.000  1.0
  Co  Co32  1  0.000  0.500  0.500  1.0
  Co  Co33  1  0.000  0.000  0.500  1.0
  Co  Co34  1  0.592  0.666  0.334  1.0
  Co  Co35  1  0.408  0.334  0.666  1.0
  Cu  Cu36  1  0.111  0.333  0.667  1.0
  Cu  Cu37  1  0.889  0.667  0.333  1.0
[/CIF]
.
The material described by Ce2Co16Cu crystallizes in the monoclinic C2/m space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 20-coordinate geometry to one Co(11), one Co(12), one Co(5), one Co(7), one Co(9), two equivalent Co(1), two equivalent Co(10), two equivalent Co(2), two equivalent Co(3), two equivalent Co(4), two equivalent Co(6), two equivalent Co(8), and one Cu(1) atom. In the second Ce site, Ce(2) is bonded in a 18-coordinate geometry to two equivalent Co(1), two equivalent Co(2), two equivalent Co(3), two equivalent Co(5), two equivalent Co(7), four equivalent Co(4), and four equivalent Co(6) atoms. There are twelve inequivalent Co sites. In the first Co site, Co(8) is bonded to two equivalent Ce(1), two equivalent Co(1), two equivalent Co(12), two equivalent Co(3), two equivalent Co(4), and two equivalent Co(5) atoms to form CoCe2Co10 cuboctahedra that share corners with two equivalent Co(10)Ce2Co8Cu2 cuboctahedra, corners with two equivalent Co(11)Ce2Co8Cu2 cuboctahedra, corners with two equivalent Co(7)Ce3Co8Cu cuboctahedra, corners with four equivalent Co(6)Ce3Co8Cu cuboctahedra, corners with four equivalent Co(4)Ce3Co9 cuboctahedra, edges with two equivalent Co(6)Ce3Co8Cu cuboctahedra, edges with two equivalent Co(7)Ce3Co8Cu cuboctahedra, edges with two equivalent Co(4)Ce3Co9 cuboctahedra, faces with two equivalent Co(8)Ce2Co10 cuboctahedra, faces with two equivalent Co(9)Ce2Co10 cuboctahedra, faces with two equivalent Co(10)Ce2Co8Cu2 cuboctahedra, faces with two equivalent Co(4)Ce3Co9 cuboctahedra, and faces with two equivalent Co(5)Ce3Co9 cuboctahedra. In the second Co site, Co(9) is bonded to two equivalent Ce(1), two equivalent Co(12), four equivalent Co(2), and four equivalent Co(4) atoms to form CoCe2Co10 cuboctahedra that share corners with two equivalent Co(7)Ce3Co8Cu cuboctahedra, corners with four equivalent Co(10)Ce2Co8Cu2 cuboctahedra, corners with four equivalent Co(6)Ce3Co8Cu cuboctahedra, corners with four equivalent Co(5)Ce3Co9 cuboctahedra, edges with two equivalent Co(5)Ce3Co9 cuboctahedra, edges with four equivalent Co(6)Ce3Co8Cu cuboctahedra, faces with two equivalent Co(11)Ce2Co8Cu2 cuboctahedra, faces with four equivalent Co(8)Ce2Co10 cuboctahedra, and faces with four equivalent Co(4)Ce3Co9 cuboctahedra. In the third Co site, Co(10) is bonded to two equivalent Ce(1), two equivalent Co(1), two equivalent Co(3), two equivalent Co(6), two equivalent Co(7), and two equivalent Cu(1) atoms to form CoCe2Co8Cu2 cuboctahedra that share corners with two equivalent Co(8)Ce2Co10 cuboctahedra, corners with two equivalent Co(9)Ce2Co10 cuboctahedra, corners with two equivalent Co(5)Ce3Co9 cuboctahedra, corners with four equivalent Co(6)Ce3Co8Cu cuboctahedra, corners with four equivalent Co(4)Ce3Co9 cuboctahedra, edges with two equivalent Co(6)Ce3Co8Cu cuboctahedra, edges with two equivalent Co(4)Ce3Co9 cuboctahedra, edges with two equivalent Co(5)Ce3Co9 cuboctahedra, faces with two equivalent Co(8)Ce2Co10 cuboctahedra, faces with two equivalent Co(10)Ce2Co8Cu2 cuboctahedra, faces with two equivalent Co(11)Ce2Co8Cu2 cuboctahedra, faces with two equivalent Co(6)Ce3Co8Cu cuboctahedra, and faces with two equivalent Co(7)Ce3Co8Cu cuboctahedra. In the fourth Co site, Co(11) is bonded to two equivalent Ce(1), four equivalent Co(2), four equivalent Co(6), and two equivalent Cu(1) atoms to form CoCe2Co8Cu2 cuboctahedra that share corners with two equivalent Co(5)Ce3Co9 cuboctahedra, corners with four equivalent Co(8)Ce2Co10 cuboctahedra, corners with four equivalent Co(7)Ce3Co8Cu cuboctahedra, corners with four equivalent Co(4)Ce3Co9 cuboctahedra, edges with two equivalent Co(7)Ce3Co8Cu cuboctahedra, edges with four equivalent Co(4)Ce3Co9 cuboctahedra, faces with two equivalent Co(9)Ce2Co10 cuboctahedra, faces with four equivalent Co(10)Ce2Co8Cu2 cuboctahedra, and faces with four equivalent Co(6)Ce3Co8Cu cuboctahedra. In the fifth Co site, Co(12) is bonded in a 14-coordinate geometry to one Ce(1), one Co(5), one Co(9), two equivalent Co(1), two equivalent Co(2), two equivalent Co(3), two equivalent Co(4), two equivalent Co(8), and one Cu(1) atom. In the sixth Co site, Co(1) is bonded in a 12-coordinate geometry to one Ce(1), one Ce(2), one Co(1), one Co(10), one Co(12), one Co(3), one Co(4), one Co(5), one Co(6), one Co(7), one Co(8), and one Cu(1) atom. In the seventh Co site, Co(2) is bonded in a 12-coordinate geometry to one Ce(1), one Ce(2), one Co(11), one Co(12), one Co(2), one Co(3), one Co(9), two equivalent Co(4), two equivalent Co(6), and one Cu(1) atom. In the eighth Co site, Co(3) is bonded in a 12-coordinate geometry to one Ce(1), one Ce(2), one Co(1), one Co(10), one Co(12), one Co(2), one Co(4), one Co(5), one Co(6), one Co(7), one Co(8), and one Cu(1) atom. In the ninth Co site, Co(4) is bonded to one Ce(1), two equivalent Ce(2), one Co(1), one Co(12), one Co(3), one Co(4), one Co(5), one Co(8), one Co(9), and two equivalent Co(2) atoms to form distorted CoCe3Co9 cuboctahedra that share  a cornercorner with one Co(11)Ce2Co8Cu2 cuboctahedra, corners with two equivalent Co(8)Ce2Co10 cuboctahedra, corners with two equivalent Co(10)Ce2Co8Cu2 cuboctahedra, corners with two equivalent Co(4)Ce3Co9 cuboctahedra, corners with three equivalent Co(7)Ce3Co8Cu cuboctahedra, corners with five equivalent Co(6)Ce3Co8Cu cuboctahedra,  an edgeedge with one Co(8)Ce2Co10 cuboctahedra,  an edgeedge with one Co(10)Ce2Co8Cu2 cuboctahedra,  an edgeedge with one Co(11)Ce2Co8Cu2 cuboctahedra,  an edgeedge with one Co(4)Ce3Co9 cuboctahedra, edges with two equivalent Co(6)Ce3Co8Cu cuboctahedra, edges with two equivalent Co(7)Ce3Co8Cu cuboctahedra,  a faceface with one Co(8)Ce2Co10 cuboctahedra,  a faceface with one Co(9)Ce2Co10 cuboctahedra, faces with two equivalent Co(6)Ce3Co8Cu cuboctahedra, faces with three equivalent Co(4)Ce3Co9 cuboctahedra, and faces with three equivalent Co(5)Ce3Co9 cuboctahedra. In the tenth Co site, Co(5) is bonded to one Ce(1), two equivalent Ce(2), one Co(12), two equivalent Co(1), two equivalent Co(3), two equivalent Co(4), and two equivalent Co(8) atoms to form distorted CoCe3Co9 cuboctahedra that share  a cornercorner with one Co(11)Ce2Co8Cu2 cuboctahedra, corners with two equivalent Co(9)Ce2Co10 cuboctahedra, corners with two equivalent Co(10)Ce2Co8Cu2 cuboctahedra, corners with two equivalent Co(7)Ce3Co8Cu cuboctahedra, corners with two equivalent Co(5)Ce3Co9 cuboctahedra, corners with six equivalent Co(6)Ce3Co8Cu cuboctahedra,  an edgeedge with one Co(9)Ce2Co10 cuboctahedra,  an edgeedge with one Co(5)Ce3Co9 cuboctahedra, edges with two equivalent Co(10)Ce2Co8Cu2 cuboctahedra, edges with four equivalent Co(6)Ce3Co8Cu cuboctahedra, faces with two equivalent Co(8)Ce2Co10 cuboctahedra, faces with two equivalent Co(7)Ce3Co8Cu cuboctahedra, and faces with six equivalent Co(4)Ce3Co9 cuboctahedra. In the eleventh Co site, Co(6) is bonded to one Ce(1), two equivalent Ce(2), one Co(1), one Co(10), one Co(11), one Co(3), one Co(6), one Co(7), two equivalent Co(2), and one Cu(1) atom to form distorted CoCe3Co8Cu cuboctahedra that share  a cornercorner with one Co(9)Ce2Co10 cuboctahedra, corners with two equivalent Co(8)Ce2Co10 cuboctahedra, corners with two equivalent Co(10)Ce2Co8Cu2 cuboctahedra, corners with two equivalent Co(6)Ce3Co8Cu cuboctahedra, corners with three equivalent Co(5)Ce3Co9 cuboctahedra, corners with five equivalent Co(4)Ce3Co9 cuboctahedra,  an edgeedge with one Co(8)Ce2Co10 cuboctahedra,  an edgeedge with one Co(9)Ce2Co10 cuboctahedra,  an edgeedge with one Co(10)Ce2Co8Cu2 cuboctahedra,  an edgeedge with one Co(6)Ce3Co8Cu cuboctahedra, edges with two equivalent Co(4)Ce3Co9 cuboctahedra, edges with two equivalent Co(5)Ce3Co9 cuboctahedra,  a faceface with one Co(10)Ce2Co8Cu2 cuboctahedra,  a faceface with one Co(11)Ce2Co8Cu2 cuboctahedra, faces with two equivalent Co(4)Ce3Co9 cuboctahedra, faces with three equivalent Co(6)Ce3Co8Cu cuboctahedra, and faces with three equivalent Co(7)Ce3Co8Cu cuboctahedra. In the twelfth Co site, Co(7) is bonded to one Ce(1), two equivalent Ce(2), two equivalent Co(1), two equivalent Co(10), two equivalent Co(3), two equivalent Co(6), and one Cu(1) atom to form distorted CoCe3Co8Cu cuboctahedra that share  a cornercorner with one Co(9)Ce2Co10 cuboctahedra, corners with two equivalent Co(8)Ce2Co10 cuboctahedra, corners with two equivalent Co(11)Ce2Co8Cu2 cuboctahedra, corners with two equivalent Co(7)Ce3Co8Cu cuboctahedra, corners with two equivalent Co(5)Ce3Co9 cuboctahedra, corners with six equivalent Co(4)Ce3Co9 cuboctahedra,  an edgeedge with one Co(11)Ce2Co8Cu2 cuboctahedra,  an edgeedge with one Co(7)Ce3Co8Cu cuboctahedra, edges with two equivalent Co(8)Ce2Co10 cuboctahedra, edges with four equivalent Co(4)Ce3Co9 cuboctahedra, faces with two equivalent Co(10)Ce2Co8Cu2 cuboctahedra, faces with two equivalent Co(5)Ce3Co9 cuboctahedra, and faces with six equivalent Co(6)Ce3Co8Cu cuboctahedra. Cu(1) is bonded in a 14-coordinate geometry to one Ce(1), one Co(11), one Co(12), one Co(7), two equivalent Co(1), two equivalent Co(10), two equivalent Co(2), two equivalent Co(3), and two equivalent Co(6) atoms. is represented by the CIF file [CIF]
data_Ce2Co16Cu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.122
_cell_length_b   8.357
_cell_length_c   8.357
_cell_angle_alpha   119.966
_cell_angle_beta   90.010
_cell_angle_gamma   89.990
_symmetry_Int_Tables_number   1
_cell_volume   491.448
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Ce  Ce0  1  0.247  0.666  0.334  1.0
  Ce  Ce1  1  0.753  0.334  0.666  1.0
  Ce  Ce2  1  0.748  0.000  1.000  1.0
  Ce  Ce3  1  0.252  1.000  0.000  1.0
  Co  Co4  1  0.749  0.671  0.047  1.0
  Co  Co5  1  0.749  0.376  0.329  1.0
  Co  Co6  1  0.749  0.953  0.624  1.0
  Co  Co7  1  0.749  0.376  0.047  1.0
  Co  Co8  1  0.749  0.953  0.329  1.0
  Co  Co9  1  0.749  0.671  0.624  1.0
  Co  Co10  1  0.251  0.329  0.953  1.0
  Co  Co11  1  0.251  0.624  0.671  1.0
  Co  Co12  1  0.251  0.047  0.376  1.0
  Co  Co13  1  0.251  0.624  0.953  1.0
  Co  Co14  1  0.251  0.047  0.671  1.0
  Co  Co15  1  0.251  0.329  0.376  1.0
  Co  Co16  1  0.478  0.833  0.667  1.0
  Co  Co17  1  0.478  0.834  0.166  1.0
  Co  Co18  1  0.478  0.333  0.167  1.0
  Co  Co19  1  0.522  0.167  0.333  1.0
  Co  Co20  1  0.522  0.166  0.834  1.0
  Co  Co21  1  0.522  0.667  0.833  1.0
  Co  Co22  1  0.982  0.164  0.328  1.0
  Co  Co23  1  0.982  0.164  0.836  1.0
  Co  Co24  1  0.982  0.672  0.836  1.0
  Co  Co25  1  0.018  0.836  0.672  1.0
  Co  Co26  1  0.018  0.836  0.164  1.0
  Co  Co27  1  0.018  0.328  0.164  1.0
  Co  Co28  1  0.500  0.500  0.000  1.0
  Co  Co29  1  0.500  0.500  0.500  1.0
  Co  Co30  1  0.500  0.000  0.500  1.0
  Co  Co31  1  0.000  0.500  0.000  1.0
  Co  Co32  1  0.000  0.500  0.500  1.0
  Co  Co33  1  0.000  0.000  0.500  1.0
  Co  Co34  1  0.592  0.666  0.334  1.0
  Co  Co35  1  0.408  0.334  0.666  1.0
  Cu  Cu36  1  0.111  0.333  0.667  1.0
  Cu  Cu37  1  0.889  0.667  0.333  1.0
[/CIF]
.