data_[Pm6Pr8Er8]
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 [Amm2]
_cell_length_a [10.8146]
_cell_length_b [5.7580]
_cell_length_c [12.1061]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [38]
_chemical_formula_structural [Pm3(PrEr)4]
_chemical_formula_sum '[Pm6 Pr8 Er8]'
_cell_volume [753.8496]
_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
[
  Pr  Pr0  4  0.2113  0.0000  0.7533  1
  Pm  Pm1  4  0.2886  0.0000  0.4119  1
  Pm  Pm2  2  0.0000  0.0000  0.2529  1
  Pr  Pr3  2  0.0000  0.0000  0.9600  1
  Pr  Pr4  2  0.5000  0.0000  0.8814  1
  Er  Er5  4  0.3048  0.0000  0.1052  1
  Er  Er6  2  0.0000  0.0000  0.5552  1
  Er  Er7  2  0.5000  0.0000  0.6081  1
]