data_[Tb4Pm6Se16]
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
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [14.5098]
_cell_length_b [8.3896]
_cell_length_c [7.1256]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.9858]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Tb2Pm3Se8]
_chemical_formula_sum '[Tb4 Pm6 Se16]'
_cell_volume [815.1822]
_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  0.2417  0.5000  0.6592  1
  Pm  Pm1  4  0.0000  0.2626  0.0000  1
  Pm  Pm2  2  0.0000  0.0000  0.5000  1
  Se  Se3  8  0.1265  0.2379  0.4171  1
  Se  Se4  4  0.1199  0.5000  0.8983  1
  Se  Se5  4  0.1212  0.0000  0.9305  1
]