data_[Pr1Er1Ag1Ru1]
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
  Ag  1.9300  1.6000  1.0867
  Ru  2.2000  1.3000  0.6610
]
_symmetry_space_group_name_H-M [P4mm]
_cell_length_a [3.4785]
_cell_length_b [3.4785]
_cell_length_c [7.6089]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [99]
_chemical_formula_structural [PrErAgRu]
_chemical_formula_sum '[Pr1 Er1 Ag1 Ru1]'
_cell_volume [92.0670]
_cell_formula_units_Z [1]
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  1  0.5000  0.5000  0.7914  1.0
  Er  Er1  1  0.5000  0.5000  0.3465  1.0
  Ag  Ag2  1  0.0000  0.0000  0.0935  1.0
  Ru  Ru3  1  0.0000  0.0000  0.5533  1.0
]