data_[K4Rb6I2O12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Rb  0.8200  2.3500  1.6600
  I  2.6600  1.4000  1.2733
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [6.6155]
_cell_length_b [11.3246]
_cell_length_c [6.5857]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.7532]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [K2Rb3IO6]
_chemical_formula_sum '[K4 Rb6 I2 O12]'
_cell_volume [464.3507]
_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
[
  Rb  Rb0  4  0.0000  0.1697  0.5000  1.0
  K  K1  4  0.0000  0.3339  0.0000  1.0
  Rb  Rb2  2  0.0000  0.5000  0.5000  1.0
  I  I3  2  0.0000  0.0000  0.0000  1.0
  O  O4  8  0.1811  0.1215  0.1806  1.0
  O  O5  4  0.1780  0.0000  0.8183  1.0
]