data_[Ce2Pm16Er4]
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
  Er  1.2400  1.7500  1.0300
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [5.6678]
_cell_length_b [8.2007]
_cell_length_c [15.9516]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [Ce(Pm4Er)2]
_chemical_formula_sum '[Ce2 Pm16 Er4]'
_cell_volume [741.4301]
_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  2  0.0000  0.5000  0.5000  1
  Pm  Pm1  8  0.0000  0.2077  0.3642  1
  Pm  Pm2  4  0.0000  0.0000  0.1638  1
  Pm  Pm3  4  0.0000  0.2892  0.0000  1
  Er  Er4  4  0.0000  0.5000  0.1996  1
]