data_[Bi8O20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Bi  2.0200  1.6000  1.0350
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Cmcm]
_cell_length_a [4.2647]
_cell_length_b [11.0987]
_cell_length_c [10.1547]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [Bi2O5]
_chemical_formula_sum '[Bi8 O20]'
_cell_volume [480.6418]
_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
[
  Bi  Bi0  8  0.0000  0.3639  0.5614  1
  O  O1  8  0.0000  0.1856  0.0359  1
  O  O2  8  0.0000  0.4538  0.1253  1
  O  O3  4  0.0000  0.2847  0.7500  1
]