data_[Rb4Pb2I8]
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
  I  2.6600  1.4000  1.2733
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [15.6308]
_cell_length_b [4.8399]
_cell_length_c [10.1739]
_cell_angle_alpha [90.0000]
_cell_angle_beta [118.3091]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Rb2PbI4]
_chemical_formula_sum '[Rb4 Pb2 I8]'
_cell_volume [677.6107]
_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
[
  Rb  Rb0  4  0.1481  0.5000  0.6781  1.0
  Pb  Pb1  2  0.0000  0.0000  0.0000  1.0
  I  I2  4  0.0552  0.0000  0.3505  1.0
  I  I3  4  0.1587  0.5000  0.0642  1.0
]