The material described by Ce2Zn17 crystallizes in the trigonal R-3m space group. Ce(1) is bonded in a 19-coordinate geometry to one Zn(1), three equivalent Zn(2), six equivalent Zn(3), and nine equivalent Zn(4) atoms. There are four inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 14-coordinate geometry to one Ce(1), one Zn(1), three equivalent Zn(2), three equivalent Zn(4), and six equivalent Zn(3) atoms. In the second Zn site, Zn(2) is bonded to two equivalent Ce(1), two equivalent Zn(1), four equivalent Zn(3), and four equivalent Zn(4) atoms to form ZnCe2Zn10 cuboctahedra that share corners with four equivalent Zn(2)Ce2Zn10 cuboctahedra, corners with eight equivalent Zn(3)Ce2Zn10 cuboctahedra, corners with ten equivalent Zn(4)Ce3Zn9 cuboctahedra, edges with four equivalent Zn(3)Ce2Zn10 cuboctahedra, edges with six equivalent Zn(4)Ce3Zn9 cuboctahedra, faces with four equivalent Zn(2)Ce2Zn10 cuboctahedra, faces with six equivalent Zn(4)Ce3Zn9 cuboctahedra, and faces with eight equivalent Zn(3)Ce2Zn10 cuboctahedra. In the third Zn site, Zn(3) is bonded to two equivalent Ce(1), two equivalent Zn(1), two equivalent Zn(2), two equivalent Zn(3), and four equivalent Zn(4) atoms to form distorted ZnCe2Zn10 cuboctahedra that share corners with four equivalent Zn(2)Ce2Zn10 cuboctahedra, corners with eight equivalent Zn(4)Ce3Zn9 cuboctahedra, corners with twelve equivalent Zn(3)Ce2Zn10 cuboctahedra,  an edgeedge with one Zn(3)Ce2Zn10 cuboctahedra, edges with two equivalent Zn(2)Ce2Zn10 cuboctahedra, edges with two equivalent Zn(4)Ce3Zn9 cuboctahedra, faces with four equivalent Zn(2)Ce2Zn10 cuboctahedra, faces with seven equivalent Zn(3)Ce2Zn10 cuboctahedra, and faces with ten equivalent Zn(4)Ce3Zn9 cuboctahedra. In the fourth Zn site, Zn(4) is bonded to three equivalent Ce(1), one Zn(1), two equivalent Zn(2), two equivalent Zn(4), and four equivalent Zn(3) atoms to form distorted ZnCe3Zn9 cuboctahedra that share corners with five equivalent Zn(2)Ce2Zn10 cuboctahedra, corners with eight equivalent Zn(3)Ce2Zn10 cuboctahedra, corners with ten equivalent Zn(4)Ce3Zn9 cuboctahedra, edges with two equivalent Zn(3)Ce2Zn10 cuboctahedra, edges with three equivalent Zn(2)Ce2Zn10 cuboctahedra, edges with five equivalent Zn(4)Ce3Zn9 cuboctahedra, faces with three equivalent Zn(2)Ce2Zn10 cuboctahedra, faces with seven equivalent Zn(4)Ce3Zn9 cuboctahedra, and faces with ten equivalent Zn(3)Ce2Zn10 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ce2Zn17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.765
_cell_length_b   6.765
_cell_length_c   6.765
_cell_angle_alpha   82.842
_cell_angle_beta   82.842
_cell_angle_gamma   82.842
_symmetry_Int_Tables_number   1
_cell_volume   302.956
_cell_formula_units_Z   1
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  0.338  0.338  0.338  1.0
  Ce  Ce1  1  0.662  0.662  0.662  1.0
  Zn  Zn2  1  0.099  0.099  0.099  1.0
  Zn  Zn3  1  0.901  0.901  0.901  1.0
  Zn  Zn4  1  0.000  0.000  0.500  1.0
  Zn  Zn5  1  0.500  0.000  0.000  1.0
  Zn  Zn6  1  0.000  0.500  0.000  1.0
  Zn  Zn7  1  0.709  0.291  0.000  1.0
  Zn  Zn8  1  0.000  0.709  0.291  1.0
  Zn  Zn9  1  0.291  0.000  0.709  1.0
  Zn  Zn10  1  0.291  0.709  0.000  1.0
  Zn  Zn11  1  0.000  0.291  0.709  1.0
  Zn  Zn12  1  0.709  0.000  0.291  1.0
  Zn  Zn13  1  0.651  0.159  0.651  1.0
  Zn  Zn14  1  0.651  0.651  0.159  1.0
  Zn  Zn15  1  0.159  0.651  0.651  1.0
  Zn  Zn16  1  0.841  0.349  0.349  1.0
  Zn  Zn17  1  0.349  0.841  0.349  1.0
  Zn  Zn18  1  0.349  0.349  0.841  1.0
[/CIF]
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The material described by Ce2Zn17 crystallizes in the trigonal R-3m space group. Ce(1) is bonded in a 19-coordinate geometry to one Zn(1), three equivalent Zn(2), six equivalent Zn(3), and nine equivalent Zn(4) atoms. There are four inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 14-coordinate geometry to one Ce(1), one Zn(1), three equivalent Zn(2), three equivalent Zn(4), and six equivalent Zn(3) atoms. In the second Zn site, Zn(2) is bonded to two equivalent Ce(1), two equivalent Zn(1), four equivalent Zn(3), and four equivalent Zn(4) atoms to form ZnCe2Zn10 cuboctahedra that share corners with four equivalent Zn(2)Ce2Zn10 cuboctahedra, corners with eight equivalent Zn(3)Ce2Zn10 cuboctahedra, corners with ten equivalent Zn(4)Ce3Zn9 cuboctahedra, edges with four equivalent Zn(3)Ce2Zn10 cuboctahedra, edges with six equivalent Zn(4)Ce3Zn9 cuboctahedra, faces with four equivalent Zn(2)Ce2Zn10 cuboctahedra, faces with six equivalent Zn(4)Ce3Zn9 cuboctahedra, and faces with eight equivalent Zn(3)Ce2Zn10 cuboctahedra. In the third Zn site, Zn(3) is bonded to two equivalent Ce(1), two equivalent Zn(1), two equivalent Zn(2), two equivalent Zn(3), and four equivalent Zn(4) atoms to form distorted ZnCe2Zn10 cuboctahedra that share corners with four equivalent Zn(2)Ce2Zn10 cuboctahedra, corners with eight equivalent Zn(4)Ce3Zn9 cuboctahedra, corners with twelve equivalent Zn(3)Ce2Zn10 cuboctahedra,  an edgeedge with one Zn(3)Ce2Zn10 cuboctahedra, edges with two equivalent Zn(2)Ce2Zn10 cuboctahedra, edges with two equivalent Zn(4)Ce3Zn9 cuboctahedra, faces with four equivalent Zn(2)Ce2Zn10 cuboctahedra, faces with seven equivalent Zn(3)Ce2Zn10 cuboctahedra, and faces with ten equivalent Zn(4)Ce3Zn9 cuboctahedra. In the fourth Zn site, Zn(4) is bonded to three equivalent Ce(1), one Zn(1), two equivalent Zn(2), two equivalent Zn(4), and four equivalent Zn(3) atoms to form distorted ZnCe3Zn9 cuboctahedra that share corners with five equivalent Zn(2)Ce2Zn10 cuboctahedra, corners with eight equivalent Zn(3)Ce2Zn10 cuboctahedra, corners with ten equivalent Zn(4)Ce3Zn9 cuboctahedra, edges with two equivalent Zn(3)Ce2Zn10 cuboctahedra, edges with three equivalent Zn(2)Ce2Zn10 cuboctahedra, edges with five equivalent Zn(4)Ce3Zn9 cuboctahedra, faces with three equivalent Zn(2)Ce2Zn10 cuboctahedra, faces with seven equivalent Zn(4)Ce3Zn9 cuboctahedra, and faces with ten equivalent Zn(3)Ce2Zn10 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ce2Zn17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.765
_cell_length_b   6.765
_cell_length_c   6.765
_cell_angle_alpha   82.842
_cell_angle_beta   82.842
_cell_angle_gamma   82.842
_symmetry_Int_Tables_number   1
_cell_volume   302.956
_cell_formula_units_Z   1
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  0.338  0.338  0.338  1.0
  Ce  Ce1  1  0.662  0.662  0.662  1.0
  Zn  Zn2  1  0.099  0.099  0.099  1.0
  Zn  Zn3  1  0.901  0.901  0.901  1.0
  Zn  Zn4  1  0.000  0.000  0.500  1.0
  Zn  Zn5  1  0.500  0.000  0.000  1.0
  Zn  Zn6  1  0.000  0.500  0.000  1.0
  Zn  Zn7  1  0.709  0.291  0.000  1.0
  Zn  Zn8  1  0.000  0.709  0.291  1.0
  Zn  Zn9  1  0.291  0.000  0.709  1.0
  Zn  Zn10  1  0.291  0.709  0.000  1.0
  Zn  Zn11  1  0.000  0.291  0.709  1.0
  Zn  Zn12  1  0.709  0.000  0.291  1.0
  Zn  Zn13  1  0.651  0.159  0.651  1.0
  Zn  Zn14  1  0.651  0.651  0.159  1.0
  Zn  Zn15  1  0.159  0.651  0.651  1.0
  Zn  Zn16  1  0.841  0.349  0.349  1.0
  Zn  Zn17  1  0.349  0.841  0.349  1.0
  Zn  Zn18  1  0.349  0.349  0.841  1.0
[/CIF]
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