data_NaCdNi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.23
_cell_length_b   3.23
_cell_length_c   6.46
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaCdNi2
_chemical_formula_sum   'Na1 Cd1 Ni2'
_cell_volume   67.39
_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
  Na  Na1  1  0.0  0.0  0.0  1.0
  Cd  Cd0  1  0.0  0.0  0.23  1.0
  Ni  Ni2  1  0.61  0.61  0.89  1.0
  Ni  Ni3  1  0.61  0.61  0.57  1.0

data_NaCdNi2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.57
_cell_length_b   4.57
_cell_length_c   6.46
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   NaCdNi2
_chemical_formula_sum   'Na2 Cd2 Ni4'
_cell_volume   134.77
_cell_formula_units_Z   2
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
  Na  Na0  2  0.0  0.0  0.0  1.0
  Cd  Cd1  2  0.0  0.0  0.23  1.0
  Ni  Ni2  2  0.11  0.5  0.57  1.0
  Ni  Ni3  2  0.11  0.5  0.89  1.0

Na Cd Ni Ni
NaNi2Cd crystallizes in the monoclinic Cm space group. Na(1) is bonded in a 2-coordinate geometry to four equivalent Ni(1) and one Cd(1) atom. There are a spread of Na(1)-Ni(1) bond distances ranging from 1.89-2.89 Å. The Na(1)-Cd(1) bond length is 1.49 Å. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 5-coordinate geometry to four equivalent Na(1) and one Ni(2) atom. The Ni(1)-Ni(2) bond length is 2.10 Å. In the second Ni site, Ni(2) is bonded in a 4-coordinate geometry to one Ni(1) and three equivalent Cd(1) atoms. There is one shorter (2.80 Å) and two longer (3.20 Å) Ni(2)-Cd(1) bond lengths. Cd(1) is bonded in a single-bond geometry to one Na(1) and three equivalent Ni(2) atoms.