data_[Na4Zn2O4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Zn  1.6500  1.3500  0.8800
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Cm]
_cell_length_a [10.5413]
_cell_length_b [4.4984]
_cell_length_c [3.3147]
_cell_angle_alpha [90.0000]
_cell_angle_beta [93.4768]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [8]
_chemical_formula_structural [Na2ZnO2]
_chemical_formula_sum '[Na4 Zn2 O4]'
_cell_volume [156.8898]
_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  0.2090  0.0000  0.6970  1.0
  Na  Na1  2  0.3070  0.5000  0.2399  1.0
  Zn  Zn2  2  0.0229  0.5000  0.1372  1.0
  O  O3  2  0.1316  0.5000  0.6881  1.0
  O  O4  2  0.3523  0.0000  0.2247  1.0
]