data_[Na4Sm8Ag4S16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sm  1.1700  1.8500  1.2290
  Ag  1.9300  1.6000  1.0867
  S  2.5800  1.0000  0.8800
]
_symmetry_space_group_name_H-M [Imma]
_cell_length_a [7.9709]
_cell_length_b [8.1514]
_cell_length_c [11.5110]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [74]
_chemical_formula_structural [NaSm2AgS4]
_chemical_formula_sum '[Na4 Sm8 Ag4 S16]'
_cell_volume [747.9138]
_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  0.2500  0.2500  0.7500  1.0
  Sm  Sm1  4  0.0000  0.0000  0.0000  1.0
  Sm  Sm2  4  0.2500  0.2500  0.2500  1.0
  Ag  Ag3  4  0.0000  0.0000  0.5000  1.0
  S  S4  8  0.0000  0.0095  0.2432  1.0
  S  S5  8  0.2452  0.2500  0.0047  1.0
]