data_[Na2W4O12]
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
]
_symmetry_space_group_name_H-M [Imm2]
_cell_length_a [5.5291]
_cell_length_b [7.8186]
_cell_length_c [5.5282]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [44]
_chemical_formula_structural [Na(WO3)2]
_chemical_formula_sum '[Na2 W4 O12]'
_cell_volume [238.9822]
_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  2  0.0000  0.0000  1.0000  1
  W  W1  4  0.0000  0.2524  0.5054  1
  O  O2  8  0.2494  0.2496  0.2557  1
  O  O3  2  0.0000  0.0000  0.4980  1
  O  O4  2  0.0000  0.5000  0.5094  1
]