data_[Tb8Pm20Sm4Er4]
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
  Er  1.2400  1.7500  1.0300
]
_symmetry_space_group_name_H-M [Cmc2_1]
_cell_length_a [5.6532]
_cell_length_b [20.3387]
_cell_length_c [10.7077]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [36]
_chemical_formula_structural [Tb2Pm5SmEr]
_chemical_formula_sum '[Tb8 Pm20 Sm4 Er4]'
_cell_volume [1231.1533]
_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  0.1109  0.7371  1
  Tb  Tb1  4  0.0000  0.1158  0.3162  1
  Pm  Pm2  4  0.0000  0.0164  0.0213  1
  Pm  Pm3  4  0.0000  0.2808  0.3091  1
  Pm  Pm4  4  0.0000  0.2977  0.7048  1
  Pm  Pm5  4  0.0000  0.3901  0.0240  1
  Pm  Pm6  4  0.0000  0.4804  0.7425  1
  Sm  Sm7  4  0.0000  0.2006  0.0096  1
  Er  Er8  4  0.0000  0.4098  0.4596  1
]