data_[K18Rb6Bi3O3]
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
  Bi  2.0200  1.6000  1.0350
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [R-3m]
_cell_length_a [7.8834]
_cell_length_b [7.8834]
_cell_length_c [27.5489]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [166]
_chemical_formula_structural [K6Rb2BiO]
_chemical_formula_sum '[K18 Rb6 Bi3 O3]'
_cell_volume [1482.7325]
_cell_formula_units_Z [3]
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  18  0.0088  0.5044  0.7210  1.0
  Rb  Rb1  6  0.0000  0.0000  0.1961  1.0
  Bi  Bi2  3  0.0000  0.0000  0.5000  1.0
  O  O3  3  -0.0000  -0.0000  0.0000  1.0
]