data_[Rb12Sn8Pb20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Sn  1.9600  1.4500  0.8300
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [Ibam]
_cell_length_a [12.0661]
_cell_length_b [17.5554]
_cell_length_c [7.7092]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [72]
_chemical_formula_structural [Rb3Sn2Pb5]
_chemical_formula_sum '[Rb12 Sn8 Pb20]'
_cell_volume [1633.0004]
_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  0.2377  0.1500  0.5000  1.0
  Rb  Rb1  4  0.0000  0.0000  0.2500  1.0
  Sn  Sn2  8  0.0957  0.1642  0.0000  1.0
  Pb  Pb3  8  0.0000  0.2859  0.2500  1.0
  Pb  Pb4  8  0.1640  0.3943  0.5000  1.0
  Pb  Pb5  4  0.0000  0.5000  0.2500  1.0
]