data_[Ag8Sb4Pb4Se16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ag  1.9300  1.6000  1.0867
  Sb  2.0500  1.4500  0.8300
  Pb  2.3300  1.8000  1.1225
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Imma]
_cell_length_a [8.1860]
_cell_length_b [8.2559]
_cell_length_c [11.6171]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [74]
_chemical_formula_structural [Ag2SbPbSe4]
_chemical_formula_sum '[Ag8 Sb4 Pb4 Se16]'
_cell_volume [785.1102]
_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
[
  Ag  Ag0  4  0.0000  0.0000  0.0000  1.0
  Ag  Ag1  4  0.2500  0.2500  0.7500  1.0
  Sb  Sb2  4  0.2500  0.2500  0.2500  1.0
  Pb  Pb3  4  0.0000  0.0000  0.5000  1.0
  Se  Se4  8  0.0000  0.0012  0.7582  1.0
  Se  Se5  8  0.2344  0.2500  0.9992  1.0
]