data_[K8Ir8O28]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Ir  2.2000  1.3500  0.7650
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Imma]
_cell_length_a [7.4304]
_cell_length_b [10.2609]
_cell_length_c [8.0106]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [74]
_chemical_formula_structural [K2Ir2O7]
_chemical_formula_sum '[K8 Ir8 O28]'
_cell_volume [610.7520]
_cell_formula_units_Z [4]
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
[
  K  K0  4  0.0000  0.0000  0.0000  1
  K  K1  4  0.2500  0.2500  0.7500  1
  Ir  Ir2  4  0.0000  0.0000  0.5000  1
  Ir  Ir3  4  0.2500  0.2500  0.2500  1
  O  O4  16  0.1956  0.1175  0.4214  1
  O  O5  8  0.0000  0.0832  0.7011  1
  O  O6  4  0.0000  0.2500  0.1698  1
]