data_[Tb8Pm4Er2]
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
  Er  1.2400  1.7500  1.0300
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [6.1134]
_cell_length_b [6.6203]
_cell_length_c [11.6034]
_cell_angle_alpha [90.0000]
_cell_angle_beta [103.8736]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [Tb4Pm2Er]
_chemical_formula_sum '[Tb8 Pm4 Er2]'
_cell_volume [455.9201]
_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  0.3514  0.0068  0.7125  1
  Tb  Tb1  2  0.0220  0.7500  0.8554  1
  Tb  Tb2  2  0.1501  0.7500  0.4444  1
  Pm  Pm3  2  0.2880  0.2500  0.4283  1
  Pm  Pm4  2  0.3988  0.2500  0.0058  1
  Er  Er5  2  0.1461  0.7500  0.1576  1
]