data_[Na8W4O8F16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  W  2.3600  1.3500  0.7667
  O  3.4400  0.6000  1.2600
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [Pbcn]
_cell_length_a [5.1382]
_cell_length_b [18.7134]
_cell_length_c [5.5406]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [60]
_chemical_formula_structural [Na2W(OF2)2]
_chemical_formula_sum '[Na8 W4 O8 F16]'
_cell_volume [532.7429]
_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  0.2294  0.2500  1
  Na  Na1  4  0.0000  0.4488  0.7500  1
  W  W2  4  0.0000  0.1073  0.7500  1
  O  O3  8  0.2283  0.0481  0.6153  1
  F  F4  8  0.1984  0.1942  0.6057  1
  F  F5  8  0.2103  0.1259  0.0407  1
]