data_[Na8Sr6Sb8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sr  0.9500  2.0000  1.3200
  Sb  2.0500  1.4500  0.8300
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [5.0708]
_cell_length_b [8.2521]
_cell_length_c [16.5974]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [Na4Sr3Sb4]
_chemical_formula_sum '[Na8 Sr6 Sb8]'
_cell_volume [694.5172]
_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
[
  Na  Na0  8  0.0000  0.1983  0.1760  1.0
  Sr  Sr1  4  0.0000  0.0000  0.3749  1.0
  Sr  Sr2  2  0.0000  0.5000  0.5000  1.0
  Sb  Sb3  4  0.0000  0.3223  0.0000  1.0
  Sb  Sb4  4  0.0000  0.5000  0.2882  1.0
]