data_[Pr16Er8Mg4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pr  1.1300  1.8500  1.0600
  Er  1.2400  1.7500  1.0300
  Mg  1.3100  1.5000  0.8600
]
_symmetry_space_group_name_H-M [Imma]
_cell_length_a [6.8874]
_cell_length_b [11.4122]
_cell_length_c [12.0887]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [74]
_chemical_formula_structural [Pr4Er2Mg]
_chemical_formula_sum '[Pr16 Er8 Mg4]'
_cell_volume [950.1826]
_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  8  0.0000  0.0125  0.1565  1
  Pr  Pr1  8  0.2237  0.2500  0.9911  1
  Er  Er2  4  0.0000  0.0000  0.5000  1
  Er  Er3  4  0.0000  0.2500  0.7163  1
  Mg  Mg4  4  0.2500  0.2500  0.2500  1
]