data_[Rb8Pb4Br20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Pb  2.3300  1.8000  1.1225
  Br  2.9600  1.1500  0.8825
]
_symmetry_space_group_name_H-M [Cmcm]
_cell_length_a [6.1402]
_cell_length_b [17.4423]
_cell_length_c [14.7981]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [Rb2PbBr5]
_chemical_formula_sum '[Rb8 Pb4 Br20]'
_cell_volume [1584.8577]
_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
[
  Rb  Rb0  8  0.0000  0.1589  0.5829  1.0
  Pb  Pb1  4  0.0000  0.1464  0.2500  1.0
  Br  Br2  8  0.0000  0.0410  0.1003  1.0
  Br  Br3  8  0.0000  0.2688  0.1151  1.0
  Br  Br4  4  0.0000  0.3213  0.7500  1.0
]