data_[Tb20Pm2Sm8]
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
  Sm  1.1700  1.8500  1.2290
]
_symmetry_space_group_name_H-M [I4/m]
_cell_length_a [12.2358]
_cell_length_b [12.2358]
_cell_length_c [7.7603]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [87]
_chemical_formula_structural [Tb10PmSm4]
_chemical_formula_sum '[Tb20 Pm2 Sm8]'
_cell_volume [1161.8389]
_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  16  0.0994  0.2007  0.2503  1
  Tb  Tb1  4  0.0000  0.5000  0.2500  1
  Pm  Pm2  2  0.0000  0.0000  0.0000  1
  Sm  Sm3  8  0.1007  0.7007  0.5000  1
]