data_[Na6Sr4Br6O4]
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
  Br  2.9600  1.1500  0.8825
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [I4/mmm]
_cell_length_a [4.7060]
_cell_length_b [4.7060]
_cell_length_c [23.3816]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [139]
_chemical_formula_structural [Na3Sr2Br3O2]
_chemical_formula_sum '[Na6 Sr4 Br6 O4]'
_cell_volume [517.8139]
_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  4  0.0000  0.0000  0.1223  1
  Na  Na1  2  0.0000  0.0000  0.5000  1
  Sr  Sr2  4  0.0000  0.5000  0.2500  1
  Br  Br3  4  0.0000  0.0000  0.3740  1
  Br  Br4  2  0.0000  0.0000  0.0000  1
  O  O5  4  0.0000  0.0000  0.2186  1
]