data_[Ir4Br2O4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ir  2.2000  1.3500  0.7650
  Br  2.9600  1.1500  0.8825
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [I4/mmm]
_cell_length_a [3.8129]
_cell_length_b [3.8129]
_cell_length_c [9.4609]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [139]
_chemical_formula_structural [Ir2BrO2]
_chemical_formula_sum '[Ir4 Br2 O4]'
_cell_volume [137.5437]
_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
[
  Ir  Ir0  4  0.0000  0.0000  0.3610  1
  Br  Br1  2  0.0000  0.0000  0.0000  1
  O  O2  4  0.0000  0.5000  0.2500  1
]