data_[Na4Cr4W2O12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Cr  1.6600  1.4000  0.9400
  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 [5.4175]
_cell_length_b [9.1370]
_cell_length_c [5.8473]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.5614]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na2Cr2WO6]
_chemical_formula_sum '[Na4 Cr4 W2 O12]'
_cell_volume [272.7340]
_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  0.1710  0.0000  1
  Cr  Cr1  4  0.0000  0.3352  0.5000  1
  W  W2  2  0.0000  0.0000  0.5000  1
  O  O3  8  0.2370  0.1690  0.6893  1
  O  O4  4  0.2283  0.5000  0.6916  1
]