data_[Tb8Pm4Tl8]
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
  Tl  1.6200  1.9000  1.3325
]
_symmetry_space_group_name_H-M [Cmcm]
_cell_length_a [3.8040]
_cell_length_b [28.2743]
_cell_length_c [5.4512]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [Tb2PmTl2]
_chemical_formula_sum '[Tb8 Pm4 Tl8]'
_cell_volume [586.3059]
_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
[
  Tb  Tb0  4  0.0000  0.0496  0.2500  1
  Tb  Tb1  4  0.0000  0.2369  0.2500  1
  Pm  Pm2  4  0.0000  0.1485  0.7500  1
  Tl  Tl3  4  0.0000  0.3557  0.7500  1
  Tl  Tl4  4  0.0000  0.4527  0.2500  1
]