data_[Na4W4O14]
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 [C2/m]
_cell_length_a [6.4230]
_cell_length_b [9.9352]
_cell_length_c [5.8653]
_cell_angle_alpha [90.0000]
_cell_angle_beta [100.2065]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na2W2O7]
_chemical_formula_sum '[Na4 W4 O14]'
_cell_volume [368.3639]
_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  0.3140  0.0000  1.0
  W  W1  4  0.2411  0.5000  0.6240  1.0
  O  O2  8  0.2131  0.1498  0.2054  1.0
  O  O3  4  0.0697  0.5000  0.3149  1.0
  O  O4  2  0.0000  0.0000  0.5000  1.0
]