data_[Pb8Se4O20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  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 [C2/c]
_cell_length_a [12.7330]
_cell_length_b [5.6056]
_cell_length_c [7.3813]
_cell_angle_alpha [90.0000]
_cell_angle_beta [123.8965]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Pb2SeO5]
_chemical_formula_sum '[Pb8 Se4 O20]'
_cell_volume [437.3073]
_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
[
  Pb  Pb0  8  0.1609  0.4985  0.4948  1
  Se  Se1  4  0.0000  0.0000  0.0000  1
  O  O2  8  0.0543  0.2864  0.1260  1
  O  O3  8  0.1613  0.1024  0.6254  1
  O  O4  4  0.0000  0.1339  0.7500  1
]