data_[Tb10Pm8Er4]
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 [C2/m]
_cell_length_a [19.5885]
_cell_length_b [5.8511]
_cell_length_c [6.2928]
_cell_angle_alpha [90.0000]
_cell_angle_beta [95.3431]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Tb5(Pm2Er)2]
_chemical_formula_sum '[Tb10 Pm8 Er4]'
_cell_volume [718.1109]
_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  0.1298  0.0000  0.8563  1
  Tb  Tb1  4  0.2129  0.0000  0.3948  1
  Tb  Tb2  2  0.0000  0.5000  0.0000  1
  Pm  Pm3  4  0.0347  0.0000  0.2777  1
  Pm  Pm4  4  0.1932  0.5000  0.0688  1
  Er  Er5  4  0.0979  0.5000  0.5410  1
]