data_[K8Rb8O12]
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
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [16.1870]
_cell_length_b [4.3506]
_cell_length_c [11.3858]
_cell_angle_alpha [90.0000]
_cell_angle_beta [120.6347]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [K2Rb2O3]
_chemical_formula_sum '[K8 Rb8 O12]'
_cell_volume [689.9242]
_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  0.0380  0.0000  0.2632  1
  K  K1  4  0.0829  0.5000  0.6513  1
  Rb  Rb2  4  0.1574  0.5000  0.9930  1
  Rb  Rb3  4  0.2293  0.0000  0.6123  1
  O  O4  4  0.0491  0.0000  0.0271  1
  O  O5  4  0.1147  0.5000  0.4353  1
  O  O6  4  0.1519  0.0000  0.8026  1
]