data_[Na4Sb4W4O28]
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
  W  2.3600  1.3500  0.7667
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Imma]
_cell_length_a [7.3034]
_cell_length_b [7.4978]
_cell_length_c [10.3084]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [74]
_chemical_formula_structural [NaSbWO7]
_chemical_formula_sum '[Na4 Sb4 W4 O28]'
_cell_volume [564.4762]
_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  0.0000  0.5000  1
  Sb  Sb1  4  0.2500  0.2500  0.7500  1
  W  W2  4  0.0000  0.0000  0.0000  1
  O  O3  16  0.1902  0.0624  0.8797  1
  O  O4  4  0.0000  0.2500  0.0636  1
  O  O5  4  0.0000  0.2500  0.2952  1
  O  O6  4  0.0000  0.2500  0.6704  1
]