data_[Ag1Bi2Pb1Se4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ag  1.9300  1.6000  1.0867
  Bi  2.0200  1.6000  1.0350
  Pb  2.3300  1.8000  1.1225
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P2/m]
_cell_length_a [7.3422]
_cell_length_b [4.3562]
_cell_length_c [7.3950]
_cell_angle_alpha [90.0000]
_cell_angle_beta [111.2039]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [10]
_chemical_formula_structural [AgBi2PbSe4]
_chemical_formula_sum '[Ag1 Bi2 Pb1 Se4]'
_cell_volume [220.5105]
_cell_formula_units_Z [1]
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  1  0.0000  0.0000  0.0000  1.0
  Bi  Bi1  1  0.5000  0.0000  0.5000  1.0
  Bi  Bi2  1  0.5000  0.5000  0.0000  1.0
  Pb  Pb3  1  0.0000  0.5000  0.5000  1.0
  Se  Se4  2  0.2476  0.5000  0.2428  1.0
  Se  Se5  2  0.2578  0.0000  0.7586  1.0
]