data_[Pm4Pr4Er16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Pr  1.1300  1.8500  1.0600
  Er  1.2400  1.7500  1.0300
]
_symmetry_space_group_name_H-M [Cmcm]
_cell_length_a [7.0108]
_cell_length_b [19.4706]
_cell_length_c [5.8341]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [PmPrEr4]
_chemical_formula_sum '[Pm4 Pr4 Er16]'
_cell_volume [796.3775]
_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
[
  Pr  Pr0  4  0.0000  0.0535  0.2500  1
  Pm  Pm1  4  0.0000  0.4468  0.7500  1
  Er  Er2  8  0.2494  0.3873  0.2500  1
  Er  Er3  8  0.2495  0.7095  0.2500  1
]