data_[Tb16Pm4Y6]
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
  Y  1.2200  1.8000  1.0400
]
_symmetry_space_group_name_H-M [Cmmm]
_cell_length_a [7.6410]
_cell_length_b [20.6414]
_cell_length_c [5.6015]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [65]
_chemical_formula_structural [Tb8Pm2Y3]
_chemical_formula_sum '[Tb16 Pm4 Y6]'
_cell_volume [883.4679]
_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  8  0.2110  0.3931  0.5000  1
  Tb  Tb1  4  0.0000  0.1311  0.0000  1
  Tb  Tb2  4  0.0000  0.3356  0.0000  1
  Pm  Pm3  4  0.0000  0.2412  0.5000  1
  Y  Y4  4  0.2144  0.5000  0.0000  1
  Y  Y5  2  0.0000  0.0000  0.5000  1
]