data_[Ce6Pm4Si6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ce  1.1200  1.8500  1.0800
  Pm  1.1300  1.8500  1.1100
  Si  1.9000  1.1000  0.5400
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [4.0195]
_cell_length_b [4.8658]
_cell_length_c [20.3967]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [Ce3Pm2Si3]
_chemical_formula_sum '[Ce6 Pm4 Si6]'
_cell_volume [398.9202]
_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
[
  Ce  Ce0  4  0.0000  0.0000  0.3922  1
  Ce  Ce1  2  0.0000  0.5000  0.5000  1
  Pm  Pm2  4  0.0000  0.5000  0.2697  1
  Si  Si3  4  0.0000  0.0000  0.1239  1
  Si  Si4  2  0.0000  0.5000  0.0000  1
]