data_[Tb6Pm8Pb8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tb  1.1000  1.7500  0.9815
  Pm  1.1300  1.8500  1.1100
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [3.6044]
_cell_length_b [9.7705]
_cell_length_c [19.3765]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [Tb3(PmPb)4]
_chemical_formula_sum '[Tb6 Pm8 Pb8]'
_cell_volume [682.3777]
_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
[
  Tb  Tb0  4  0.0000  0.0000  0.0913  1
  Tb  Tb1  2  0.0000  0.5000  0.0000  1
  Pm  Pm2  8  0.0000  0.1771  0.3382  1
  Pb  Pb3  4  0.0000  0.2791  0.5000  1
  Pb  Pb4  4  0.0000  0.5000  0.2746  1
]