data_[K4Rb12O8]
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 [16.2667]
_cell_length_b [4.4502]
_cell_length_c [10.4938]
_cell_angle_alpha [90.0000]
_cell_angle_beta [113.9335]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [KRb3O2]
_chemical_formula_sum '[K4 Rb12 O8]'
_cell_volume [694.3361]
_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
[
  Rb  Rb0  4  0.0496  0.0000  0.2470  1.0
  K  K1  4  0.0743  0.5000  0.6580  1.0
  Rb  Rb2  4  0.1716  0.5000  0.0124  1.0
  Rb  Rb3  4  0.2090  0.0000  0.5941  1.0
  O  O4  4  0.1134  0.5000  0.4209  1.0
  O  O5  4  0.1408  0.0000  0.8313  1.0
]