data_[Pr2Er2Se2O4]
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
  Se  2.5500  1.1500  1.0133
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [6.6285]
_cell_length_b [4.0894]
_cell_length_c [7.7346]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.6872]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [PrErSeO2]
_chemical_formula_sum '[Pr2 Er2 Se2 O4]'
_cell_volume [198.6050]
_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  2  0.3084  0.7500  0.0706  1.0
  Er  Er1  2  0.3314  0.7500  0.5783  1.0
  Se  Se2  2  0.0454  0.2500  0.7508  1.0
  O  O3  2  0.4806  0.2500  0.6093  1.0
  O  O4  2  0.4856  0.2500  0.1316  1.0
]