data_[Na4Ce8Ag4S20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Ce  1.1200  1.8500  1.0800
  Ag  1.9300  1.6000  1.0867
  S  2.5800  1.0000  0.8800
]
_symmetry_space_group_name_H-M [I4/mcm]
_cell_length_a [7.7484]
_cell_length_b [7.7484]
_cell_length_c [14.4560]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [140]
_chemical_formula_structural [NaCe2AgS5]
_chemical_formula_sum '[Na4 Ce8 Ag4 S20]'
_cell_volume [867.8962]
_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  4  0.0000  0.0000  0.2500  1.0
  Ce  Ce1  8  0.1641  0.3359  0.0000  1.0
  Ag  Ag2  4  0.0000  0.5000  0.2500  1.0
  S  S3  16  0.1493  0.3507  0.3804  1.0
  S  S4  4  0.0000  0.0000  0.0000  1.0
]