data_[Eu4Er4As2P2O2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Eu  1.2000  1.8500  1.1985
  Er  1.2400  1.7500  1.0300
  As  2.1800  1.1500  0.6600
  P  2.1900  1.0000  0.5500
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [I4mm]
_cell_length_a [4.4961]
_cell_length_b [4.4961]
_cell_length_c [15.5795]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [107]
_chemical_formula_structural [Eu2Er2AsPO]
_chemical_formula_sum '[Eu4 Er4 As2 P2 O2]'
_cell_volume [314.9418]
_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
[
  Eu  Eu0  2  0.0000  0.0000  0.3228  1
  Eu  Eu1  2  0.0000  0.0000  0.6740  1
  Er  Er2  4  0.0000  0.5000  0.0030  1
  As  As3  2  0.0000  0.0000  0.8720  1
  P  P4  2  0.0000  0.0000  0.1247  1
  O  O5  2  0.0000  0.0000  0.5005  1
]