The material structure described by Ce2Cd17 crystallizes in the hexagonal P-6m2 space group. There are four inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 18-coordinate geometry to six equivalent Cd(1), six equivalent Cd(2), and six equivalent Cd(5) atoms. In the second Ce site, Ce(2) is bonded in a 18-coordinate geometry to six equivalent Cd(1), six equivalent Cd(2), and six equivalent Cd(6) atoms. In the third Ce site, Ce(3) is bonded to two equivalent Cd(3), six equivalent Cd(1), six equivalent Cd(5), and six equivalent Cd(7) atoms to form distorted CeCd20 hexagonal bipyramids that share corners with six equivalent Ce(4)Cd20 hexagonal bipyramids, faces with six equivalent Cd(7)Ce2Cd10 cuboctahedra, faces with six equivalent Cd(1)Ce3Cd9 cuboctahedra, and faces with twelve equivalent Cd(2)Ce3Cd9 cuboctahedra. In the fourth Ce site, Ce(4) is bonded to two equivalent Cd(4), six equivalent Cd(2), six equivalent Cd(6), and six equivalent Cd(7) atoms to form distorted CeCd20 hexagonal bipyramids that share corners with six equivalent Ce(3)Cd20 hexagonal bipyramids, faces with six equivalent Cd(7)Ce2Cd10 cuboctahedra, faces with six equivalent Cd(2)Ce3Cd9 cuboctahedra, and faces with twelve equivalent Cd(1)Ce3Cd9 cuboctahedra. There are seven inequivalent Cd sites. In the first Cd site, Cd(1) is bonded to one Ce(1), one Ce(2), one Ce(3), one Cd(3), two equivalent Cd(2), two equivalent Cd(5), two equivalent Cd(6), and two equivalent Cd(7) atoms to form distorted CdCe3Cd9 cuboctahedra that share corners with four equivalent Cd(2)Ce3Cd9 cuboctahedra, corners with five equivalent Cd(7)Ce2Cd10 cuboctahedra, corners with six equivalent Cd(1)Ce3Cd9 cuboctahedra, edges with three equivalent Cd(7)Ce2Cd10 cuboctahedra, edges with five equivalent Cd(2)Ce3Cd9 cuboctahedra, faces with two equivalent Cd(7)Ce2Cd10 cuboctahedra, faces with two equivalent Cd(2)Ce3Cd9 cuboctahedra, faces with six equivalent Cd(1)Ce3Cd9 cuboctahedra,  a faceface with one Ce(3)Cd20 hexagonal bipyramid, and faces with two equivalent Ce(4)Cd20 hexagonal bipyramids. In the second Cd site, Cd(2) is bonded to one Ce(1), one Ce(2), one Ce(4), one Cd(4), two equivalent Cd(1), two equivalent Cd(5), two equivalent Cd(6), and two equivalent Cd(7) atoms to form distorted CdCe3Cd9 cuboctahedra that share corners with four equivalent Cd(1)Ce3Cd9 cuboctahedra, corners with five equivalent Cd(7)Ce2Cd10 cuboctahedra, corners with six equivalent Cd(2)Ce3Cd9 cuboctahedra, edges with three equivalent Cd(7)Ce2Cd10 cuboctahedra, edges with five equivalent Cd(1)Ce3Cd9 cuboctahedra, faces with two equivalent Cd(7)Ce2Cd10 cuboctahedra, faces with two equivalent Cd(1)Ce3Cd9 cuboctahedra, faces with six equivalent Cd(2)Ce3Cd9 cuboctahedra,  a faceface with one Ce(4)Cd20 hexagonal bipyramid, and faces with two equivalent Ce(3)Cd20 hexagonal bipyramids. In the third Cd site, Cd(7) is bonded to one Ce(3), one Ce(4), one Cd(3), one Cd(4), two equivalent Cd(1), two equivalent Cd(2), two equivalent Cd(5), and two equivalent Cd(6) atoms to form CdCe2Cd10 cuboctahedra that share corners with four equivalent Cd(7)Ce2Cd10 cuboctahedra, corners with five equivalent Cd(1)Ce3Cd9 cuboctahedra, corners with five equivalent Cd(2)Ce3Cd9 cuboctahedra, edges with three equivalent Cd(1)Ce3Cd9 cuboctahedra, edges with three equivalent Cd(2)Ce3Cd9 cuboctahedra, faces with two equivalent Cd(1)Ce3Cd9 cuboctahedra, faces with two equivalent Cd(2)Ce3Cd9 cuboctahedra, faces with six equivalent Cd(7)Ce2Cd10 cuboctahedra,  a faceface with one Ce(3)Cd20 hexagonal bipyramid, and  a faceface with one Ce(4)Cd20 hexagonal bipyramid. In the fourth Cd site, Cd(3) is bonded in a 8-coordinate geometry to one Ce(3), one Cd(3), three equivalent Cd(1), and three equivalent Cd(7) atoms. In the fifth Cd site, Cd(4) is bonded in a 8-coordinate geometry to one Ce(4), one Cd(4), three equivalent Cd(2), and three equivalent Cd(7) atoms. In the sixth Cd site, Cd(5) is bonded in a 10-coordinate geometry to one Ce(1), one Ce(3), two equivalent Cd(1), two equivalent Cd(2), two equivalent Cd(5), and two equivalent Cd(7) atoms. In the seventh Cd site, Cd(6) is bonded in a 10-coordinate geometry to one Ce(2), one Ce(4), two equivalent Cd(1), two equivalent Cd(2), two equivalent Cd(6), and two equivalent Cd(7) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ce2Cd17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.264
_cell_length_b   10.592
_cell_length_c   10.599
_cell_angle_alpha   120.033
_cell_angle_beta   90.058
_cell_angle_gamma   89.904
_symmetry_Int_Tables_number   1
_cell_volume   997.614
_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  0.750  0.000  1.000  1.0
  Ce  Ce1  1  0.250  1.000  1.000  1.0
  Ce  Ce2  1  0.750  0.667  0.333  1.0
  Ce  Ce3  1  0.250  0.333  0.667  1.0
  Cd  Cd4  1  0.995  0.838  0.162  1.0
  Cd  Cd5  1  0.005  0.162  0.838  1.0
  Cd  Cd6  1  0.995  0.324  0.162  1.0
  Cd  Cd7  1  0.495  0.162  0.838  1.0
  Cd  Cd8  1  0.005  0.676  0.838  1.0
  Cd  Cd9  1  0.505  0.838  0.162  1.0
  Cd  Cd10  1  0.995  0.838  0.676  1.0
  Cd  Cd11  1  0.495  0.676  0.838  1.0
  Cd  Cd12  1  0.005  0.162  0.324  1.0
  Cd  Cd13  1  0.505  0.324  0.162  1.0
  Cd  Cd14  1  0.495  0.162  0.324  1.0
  Cd  Cd15  1  0.505  0.838  0.676  1.0
  Cd  Cd16  1  0.401  0.667  0.333  1.0
  Cd  Cd17  1  0.598  0.333  0.667  1.0
  Cd  Cd18  1  0.902  0.333  0.667  1.0
  Cd  Cd19  1  0.099  0.667  0.333  1.0
  Cd  Cd20  1  0.750  0.008  0.339  1.0
  Cd  Cd21  1  0.250  0.992  0.662  1.0
  Cd  Cd22  1  0.750  0.331  0.992  1.0
  Cd  Cd23  1  0.250  0.670  0.662  1.0
  Cd  Cd24  1  0.250  0.670  0.008  1.0
  Cd  Cd25  1  0.750  0.331  0.339  1.0
  Cd  Cd26  1  0.750  0.661  0.669  1.0
  Cd  Cd27  1  0.250  0.338  0.008  1.0
  Cd  Cd28  1  0.250  0.338  0.330  1.0
  Cd  Cd29  1  0.750  0.661  0.992  1.0
  Cd  Cd30  1  0.250  0.992  0.330  1.0
  Cd  Cd31  1  0.750  0.008  0.669  1.0
  Cd  Cd32  1  1.000  0.500  0.500  1.0
  Cd  Cd33  1  1.000  1.000  0.500  1.0
  Cd  Cd34  1  0.500  0.500  0.500  1.0
  Cd  Cd35  1  1.000  0.500  0.000  1.0
  Cd  Cd36  1  0.500  1.000  0.500  1.0
  Cd  Cd37  1  0.500  0.500  0.000  1.0
[/CIF]
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The material structure described by Ce2Cd17 crystallizes in the hexagonal P-6m2 space group. There are four inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 18-coordinate geometry to six equivalent Cd(1), six equivalent Cd(2), and six equivalent Cd(5) atoms. In the second Ce site, Ce(2) is bonded in a 18-coordinate geometry to six equivalent Cd(1), six equivalent Cd(2), and six equivalent Cd(6) atoms. In the third Ce site, Ce(3) is bonded to two equivalent Cd(3), six equivalent Cd(1), six equivalent Cd(5), and six equivalent Cd(7) atoms to form distorted CeCd20 hexagonal bipyramids that share corners with six equivalent Ce(4)Cd20 hexagonal bipyramids, faces with six equivalent Cd(7)Ce2Cd10 cuboctahedra, faces with six equivalent Cd(1)Ce3Cd9 cuboctahedra, and faces with twelve equivalent Cd(2)Ce3Cd9 cuboctahedra. In the fourth Ce site, Ce(4) is bonded to two equivalent Cd(4), six equivalent Cd(2), six equivalent Cd(6), and six equivalent Cd(7) atoms to form distorted CeCd20 hexagonal bipyramids that share corners with six equivalent Ce(3)Cd20 hexagonal bipyramids, faces with six equivalent Cd(7)Ce2Cd10 cuboctahedra, faces with six equivalent Cd(2)Ce3Cd9 cuboctahedra, and faces with twelve equivalent Cd(1)Ce3Cd9 cuboctahedra. There are seven inequivalent Cd sites. In the first Cd site, Cd(1) is bonded to one Ce(1), one Ce(2), one Ce(3), one Cd(3), two equivalent Cd(2), two equivalent Cd(5), two equivalent Cd(6), and two equivalent Cd(7) atoms to form distorted CdCe3Cd9 cuboctahedra that share corners with four equivalent Cd(2)Ce3Cd9 cuboctahedra, corners with five equivalent Cd(7)Ce2Cd10 cuboctahedra, corners with six equivalent Cd(1)Ce3Cd9 cuboctahedra, edges with three equivalent Cd(7)Ce2Cd10 cuboctahedra, edges with five equivalent Cd(2)Ce3Cd9 cuboctahedra, faces with two equivalent Cd(7)Ce2Cd10 cuboctahedra, faces with two equivalent Cd(2)Ce3Cd9 cuboctahedra, faces with six equivalent Cd(1)Ce3Cd9 cuboctahedra,  a faceface with one Ce(3)Cd20 hexagonal bipyramid, and faces with two equivalent Ce(4)Cd20 hexagonal bipyramids. In the second Cd site, Cd(2) is bonded to one Ce(1), one Ce(2), one Ce(4), one Cd(4), two equivalent Cd(1), two equivalent Cd(5), two equivalent Cd(6), and two equivalent Cd(7) atoms to form distorted CdCe3Cd9 cuboctahedra that share corners with four equivalent Cd(1)Ce3Cd9 cuboctahedra, corners with five equivalent Cd(7)Ce2Cd10 cuboctahedra, corners with six equivalent Cd(2)Ce3Cd9 cuboctahedra, edges with three equivalent Cd(7)Ce2Cd10 cuboctahedra, edges with five equivalent Cd(1)Ce3Cd9 cuboctahedra, faces with two equivalent Cd(7)Ce2Cd10 cuboctahedra, faces with two equivalent Cd(1)Ce3Cd9 cuboctahedra, faces with six equivalent Cd(2)Ce3Cd9 cuboctahedra,  a faceface with one Ce(4)Cd20 hexagonal bipyramid, and faces with two equivalent Ce(3)Cd20 hexagonal bipyramids. In the third Cd site, Cd(7) is bonded to one Ce(3), one Ce(4), one Cd(3), one Cd(4), two equivalent Cd(1), two equivalent Cd(2), two equivalent Cd(5), and two equivalent Cd(6) atoms to form CdCe2Cd10 cuboctahedra that share corners with four equivalent Cd(7)Ce2Cd10 cuboctahedra, corners with five equivalent Cd(1)Ce3Cd9 cuboctahedra, corners with five equivalent Cd(2)Ce3Cd9 cuboctahedra, edges with three equivalent Cd(1)Ce3Cd9 cuboctahedra, edges with three equivalent Cd(2)Ce3Cd9 cuboctahedra, faces with two equivalent Cd(1)Ce3Cd9 cuboctahedra, faces with two equivalent Cd(2)Ce3Cd9 cuboctahedra, faces with six equivalent Cd(7)Ce2Cd10 cuboctahedra,  a faceface with one Ce(3)Cd20 hexagonal bipyramid, and  a faceface with one Ce(4)Cd20 hexagonal bipyramid. In the fourth Cd site, Cd(3) is bonded in a 8-coordinate geometry to one Ce(3), one Cd(3), three equivalent Cd(1), and three equivalent Cd(7) atoms. In the fifth Cd site, Cd(4) is bonded in a 8-coordinate geometry to one Ce(4), one Cd(4), three equivalent Cd(2), and three equivalent Cd(7) atoms. In the sixth Cd site, Cd(5) is bonded in a 10-coordinate geometry to one Ce(1), one Ce(3), two equivalent Cd(1), two equivalent Cd(2), two equivalent Cd(5), and two equivalent Cd(7) atoms. In the seventh Cd site, Cd(6) is bonded in a 10-coordinate geometry to one Ce(2), one Ce(4), two equivalent Cd(1), two equivalent Cd(2), two equivalent Cd(6), and two equivalent Cd(7) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ce2Cd17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.264
_cell_length_b   10.592
_cell_length_c   10.599
_cell_angle_alpha   120.033
_cell_angle_beta   90.058
_cell_angle_gamma   89.904
_symmetry_Int_Tables_number   1
_cell_volume   997.614
_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  0.750  0.000  1.000  1.0
  Ce  Ce1  1  0.250  1.000  1.000  1.0
  Ce  Ce2  1  0.750  0.667  0.333  1.0
  Ce  Ce3  1  0.250  0.333  0.667  1.0
  Cd  Cd4  1  0.995  0.838  0.162  1.0
  Cd  Cd5  1  0.005  0.162  0.838  1.0
  Cd  Cd6  1  0.995  0.324  0.162  1.0
  Cd  Cd7  1  0.495  0.162  0.838  1.0
  Cd  Cd8  1  0.005  0.676  0.838  1.0
  Cd  Cd9  1  0.505  0.838  0.162  1.0
  Cd  Cd10  1  0.995  0.838  0.676  1.0
  Cd  Cd11  1  0.495  0.676  0.838  1.0
  Cd  Cd12  1  0.005  0.162  0.324  1.0
  Cd  Cd13  1  0.505  0.324  0.162  1.0
  Cd  Cd14  1  0.495  0.162  0.324  1.0
  Cd  Cd15  1  0.505  0.838  0.676  1.0
  Cd  Cd16  1  0.401  0.667  0.333  1.0
  Cd  Cd17  1  0.598  0.333  0.667  1.0
  Cd  Cd18  1  0.902  0.333  0.667  1.0
  Cd  Cd19  1  0.099  0.667  0.333  1.0
  Cd  Cd20  1  0.750  0.008  0.339  1.0
  Cd  Cd21  1  0.250  0.992  0.662  1.0
  Cd  Cd22  1  0.750  0.331  0.992  1.0
  Cd  Cd23  1  0.250  0.670  0.662  1.0
  Cd  Cd24  1  0.250  0.670  0.008  1.0
  Cd  Cd25  1  0.750  0.331  0.339  1.0
  Cd  Cd26  1  0.750  0.661  0.669  1.0
  Cd  Cd27  1  0.250  0.338  0.008  1.0
  Cd  Cd28  1  0.250  0.338  0.330  1.0
  Cd  Cd29  1  0.750  0.661  0.992  1.0
  Cd  Cd30  1  0.250  0.992  0.330  1.0
  Cd  Cd31  1  0.750  0.008  0.669  1.0
  Cd  Cd32  1  1.000  0.500  0.500  1.0
  Cd  Cd33  1  1.000  1.000  0.500  1.0
  Cd  Cd34  1  0.500  0.500  0.500  1.0
  Cd  Cd35  1  1.000  0.500  0.000  1.0
  Cd  Cd36  1  0.500  1.000  0.500  1.0
  Cd  Cd37  1  0.500  0.500  0.000  1.0
[/CIF]
.