data_[Ba4Gd2Er2O12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ba  0.8900  2.1500  1.4900
  Gd  1.2000  1.8000  1.0750
  Er  1.2400  1.7500  1.0300
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [I4/m]
_cell_length_a [6.1857]
_cell_length_b [6.1857]
_cell_length_c [8.9113]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [87]
_chemical_formula_structural [Ba2GdErO6]
_chemical_formula_sum '[Ba4 Gd2 Er2 O12]'
_cell_volume [340.9721]
_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
[
  Ba  Ba0  4  0.0000  0.5000  0.2500  1.0
  Gd  Gd1  2  0.0000  0.0000  0.0000  1.0
  Er  Er2  2  0.0000  0.0000  0.5000  1.0
  O  O3  8  0.1957  0.6972  0.5000  1.0
  O  O4  4  0.0000  0.0000  0.2506  1.0
]