data_[K12Na4O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Na  0.9300  1.8000  1.1600
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [14.7607]
_cell_length_b [4.4467]
_cell_length_c [7.7589]
_cell_angle_alpha [90.0000]
_cell_angle_beta [100.4205]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [K3NaO2]
_chemical_formula_sum '[K12 Na4 O8]'
_cell_volume [500.8711]
_cell_formula_units_Z [4]
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
[
  K  K0  4  0.0551  0.0000  0.1980  1.0
  K  K1  4  0.1793  0.5000  0.0508  1.0
  K  K2  4  0.1863  0.0000  0.5676  1.0
  Na  Na3  4  0.0587  0.5000  0.6665  1.0
  O  O4  4  0.1102  0.5000  0.3893  1.0
  O  O5  4  0.1248  0.0000  0.8631  1.0
]