data_[La4Tb4Pm8Se20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  La  1.1000  1.9500  1.1720
  Tb  1.1000  1.7500  0.9815
  Pm  1.1300  1.8500  1.1100
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Cmc2_1]
_cell_length_a [4.2515]
_cell_length_b [18.7679]
_cell_length_c [13.1095]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [36]
_chemical_formula_structural [LaTbPm2Se5]
_chemical_formula_sum '[La4 Tb4 Pm8 Se20]'
_cell_volume [1046.0209]
_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  0.2832  0.0710  1
  La  La1  4  0.0000  0.3929  0.3973  1
  Pm  Pm2  4  0.0000  0.0266  0.6035  1
  Pm  Pm3  4  0.0000  0.0984  0.3266  1
  Se  Se4  4  0.0000  0.1290  0.0704  1
  Se  Se5  4  0.0000  0.1662  0.7138  1
  Se  Se6  4  0.0000  0.2364  0.4227  1
  Se  Se7  4  0.0000  0.4253  0.9767  1
  Se  Se8  4  0.0000  0.4887  0.7421  1
]