data_[Sr2Pb4Se2O4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sr  0.9500  2.0000  1.3200
  Pb  2.3300  1.8000  1.1225
  Se  2.5500  1.1500  1.0133
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [7.1122]
_cell_length_b [6.0806]
_cell_length_c [7.2310]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.1902]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [SrPb2SeO2]
_chemical_formula_sum '[Sr2 Pb4 Se2 O4]'
_cell_volume [295.3394]
_cell_formula_units_Z [2]
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
[
  Sr  Sr0  2  0.1649  0.2500  0.9603  1.0
  Pb  Pb1  2  0.0758  0.2500  0.4188  1.0
  Pb  Pb2  2  0.3682  0.7500  0.3498  1.0
  Se  Se3  2  0.3469  0.7500  0.7609  1.0
  O  O4  4  0.1268  0.5038  0.2175  1.0
]