data_[Pm20Pb8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [16.4339]
_cell_length_b [5.9619]
_cell_length_c [9.1060]
_cell_angle_alpha [90.0000]
_cell_angle_beta [97.0921]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Pm5Pb2]
_chemical_formula_sum '[Pm20 Pb8]'
_cell_volume [885.3524]
_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
[
  Pm  Pm0  8  0.1291  0.2045  0.4550  1
  Pm  Pm1  8  0.2202  0.3558  0.8163  1
  Pm  Pm2  4  0.0000  0.2359  0.7500  1
  Pb  Pb3  8  0.0850  0.2987  0.0981  1
]