data_[Na12Ag4O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Ag  1.9300  1.6000  1.0867
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Ibam]
_cell_length_a [5.7299]
_cell_length_b [11.7768]
_cell_length_c [5.3817]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [72]
_chemical_formula_structural [Na3AgO2]
_chemical_formula_sum '[Na12 Ag4 O8]'
_cell_volume [363.1527]
_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
[
  Na  Na0  8  0.1804  0.6953  0.5000  1
  Na  Na1  4  0.0000  0.5000  0.2500  1
  Ag  Ag2  4  0.0000  0.0000  0.2500  1
  O  O3  8  0.2135  0.3789  0.5000  1
]