data_[Na4Sr8Bi4S16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sr  0.9500  2.0000  1.3200
  Bi  2.0200  1.6000  1.0350
  S  2.5800  1.0000  0.8800
]
_symmetry_space_group_name_H-M [Imma]
_cell_length_a [8.3414]
_cell_length_b [8.4588]
_cell_length_c [11.7361]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [74]
_chemical_formula_structural [NaSr2BiS4]
_chemical_formula_sum '[Na4 Sr8 Bi4 S16]'
_cell_volume [828.0727]
_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  0.0000  1.0
  Sr  Sr1  4  0.0000  0.0000  0.5000  1.0
  Sr  Sr2  4  0.2500  0.2500  0.7500  1.0
  Bi  Bi3  4  0.2500  0.2500  0.2500  1.0
  S  S4  8  0.0000  0.0112  0.2472  1.0
  S  S5  8  0.2498  0.2500  0.4937  1.0
]