data_[Na6Ni4W2O12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Ni  1.9100  1.3500  0.7400
  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 [5.3843]
_cell_length_b [9.2731]
_cell_length_c [5.6872]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.5434]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na3Ni2WO6]
_chemical_formula_sum '[Na6 Ni4 W2 O12]'
_cell_volume [269.2160]
_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  0.1729  0.5000  1.0
  Na  Na1  2  0.0000  0.5000  0.5000  1.0
  Ni  Ni2  4  0.0000  0.3357  0.0000  1.0
  W  W3  2  0.0000  0.0000  0.0000  1.0
  O  O4  8  0.2256  0.1588  0.2029  1.0
  O  O5  4  0.2480  0.5000  0.2070  1.0
]