data_[Na4Ni8Sb8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Ni  1.9100  1.3500  0.7400
  Sb  2.0500  1.4500  0.8300
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [6.0647]
_cell_length_b [11.1620]
_cell_length_c [6.7752]
_cell_angle_alpha [90.0000]
_cell_angle_beta [110.9173]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Na(NiSb)2]
_chemical_formula_sum '[Na4 Ni8 Sb8]'
_cell_volume [428.4166]
_cell_formula_units_Z [4]
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  Na0  4  0.0000  0.1407  0.2500  1
  Ni  Ni1  8  0.1243  0.3575  0.9515  1
  Sb  Sb2  4  0.0000  0.1659  0.7500  1
  Sb  Sb3  4  0.0000  0.4499  0.2500  1
]