data_[Rb18Pb3I24]
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 [R-3]
_cell_length_a [10.9083]
_cell_length_b [10.9083]
_cell_length_c [21.8769]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [148]
_chemical_formula_structural [Rb6PbI8]
_chemical_formula_sum '[Rb18 Pb3 I24]'
_cell_volume [2254.3912]
_cell_formula_units_Z [3]
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  18  0.0182  0.6175  0.9215  1
  Pb  Pb1  3  0.0000  0.0000  0.0000  1
  I  I2  18  0.0107  0.7584  0.0857  1
  I  I3  6  0.0000  0.0000  0.3415  1
]