data_[Na8Sb8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sb  2.0500  1.4500  0.8300
]
_symmetry_space_group_name_H-M [P2_12_12_1]
_cell_length_a [6.4695]
_cell_length_b [6.8640]
_cell_length_c [11.3400]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [19]
_chemical_formula_structural [NaSb]
_chemical_formula_sum '[Na8 Sb8]'
_cell_volume [503.5664]
_cell_formula_units_Z [8]
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  0.1182  0.4116  0.4320  1.0
  Na  Na1  4  0.1477  0.1800  0.7972  1.0
  Sb  Sb2  4  0.1272  0.9816  0.5444  1.0
  Sb  Sb3  4  0.1446  0.3411  0.1407  1.0
]