data_Ce(NiSn)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.44
_cell_length_b   4.44
_cell_length_c   10.1
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ce(NiSn)2
_chemical_formula_sum   'Ce2 Ni4 Sn4'
_cell_volume   198.98
_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  0.0  0.22  0.41  1.0
  Ce  Ce1  1  0.22  0.0  0.69  1.0
  Ni  Ni2  1  0.0  0.0  0.0  1.0
  Ni  Ni3  1  0.22  0.22  0.0  1.0
  Ni  Ni4  1  0.0  0.22  0.34  1.0
  Ni  Ni5  1  0.22  0.0  0.75  1.0
  Sn  Sn6  1  0.0  0.0  0.05  1.0
  Sn  Sn7  1  0.22  0.22  0.05  1.0
  Sn  Sn8  1  0.0  0.22  0.83  1.0
  Sn  Sn9  1  0.22  0.0  0.27  1.0

data_Ce(NiSn)2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.28
_cell_length_b   6.28
_cell_length_c   10.1
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Ce(NiSn)2
_chemical_formula_sum   'Ce4 Ni8 Sn8'
_cell_volume   397.96
_cell_formula_units_Z   4
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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  2  0.0  0.0  0.41  1.0
  Ce  Ce1  2  0.22  0.0  0.69  1.0
  Ni  Ni2  4  0.11  0.11  0.0  1.0
  Ni  Ni3  2  0.0  0.0  0.34  1.0
  Ni  Ni4  2  0.22  0.0  0.75  1.0
  Sn  Sn5  4  0.11  0.11  0.05  1.0
  Sn  Sn6  2  0.0  0.0  0.83  1.0
  Sn  Sn7  2  0.22  0.0  0.27  1.0

Ce Ce Ni Ni Ni Ni Sn Sn Sn Sn
CeNi2Sn2 crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of four CeNiSn clusters and four NiSn clusters. In each CeNiSn cluster, Ce(1) is bonded in a single-bond geometry to one Ni(2) atom. The Ce(1)-Ni(2) bond length is 0.61 Å. Ni(2) is bonded in a distorted single-bond geometry to one Ce(1) and one Sn(3) atom. The Ni(2)-Sn(3) bond length is 1.56 Å. Sn(3) is bonded in a single-bond geometry to one Ni(2) atom. In each NiSn cluster, Ni(1) is bonded in a single-bond geometry to one Sn(1) atom. The Ni(1)-Sn(1) bond length is 0.50 Å. Sn(1) is bonded in a single-bond geometry to one Ni(1) atom.