data_[K2Rb2Pb2I8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  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 [I4mm]
_cell_length_a [6.3557]
_cell_length_b [6.3557]
_cell_length_c [18.4273]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [107]
_chemical_formula_structural [KRbPbI4]
_chemical_formula_sum '[K2 Rb2 Pb2 I8]'
_cell_volume [744.3619]
_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
[
  K  K0  2  0.0000  0.0000  0.3636  1.0
  Rb  Rb1  2  0.0000  0.0000  0.6360  1.0
  Pb  Pb2  2  0.0000  0.0000  0.0013  1.0
  I  I3  4  0.0000  0.5000  0.4970  1.0
  I  I4  2  0.0000  0.0000  0.1762  1.0
  I  I5  2  0.0000  0.0000  0.8289  1.0
]