data_[Ce4Pm4Sm8Er20]
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
  Sm  1.1700  1.8500  1.2290
  Er  1.2400  1.7500  1.0300
]
_symmetry_space_group_name_H-M [I4/mcm]
_cell_length_a [8.6505]
_cell_length_b [8.6505]
_cell_length_c [15.3352]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [140]
_chemical_formula_structural [CePmSm2Er5]
_chemical_formula_sum '[Ce4 Pm4 Sm8 Er20]'
_cell_volume [1147.5492]
_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
[
  Ce  Ce0  4  0.0000  0.5000  0.2500  1
  Pm  Pm1  4  0.0000  0.0000  0.2500  1
  Sm  Sm2  8  0.1188  0.6188  0.5000  1
  Er  Er3  16  0.2036  0.2964  0.3621  1
  Er  Er4  4  0.0000  0.0000  0.0000  1
]