data_[K22Rb18Na8]
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
  Na  0.9300  1.8000  1.1600
]
_symmetry_space_group_name_H-M [Cmmm]
_cell_length_a [21.5418]
_cell_length_b [32.3861]
_cell_length_c [4.9919]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [65]
_chemical_formula_structural [K11Rb9Na4]
_chemical_formula_sum '[K22 Rb18 Na8]'
_cell_volume [3482.6572]
_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  8  0.1089  0.2560  0.5000  1
  Rb  Rb1  8  0.1488  0.0742  0.5000  1
  K  K2  8  0.2491  0.1721  0.0000  1
  K  K3  4  0.0000  0.1511  0.0000  1
  K  K4  4  0.0000  0.3671  0.0000  1
  K  K5  4  0.1905  0.5000  0.0000  1
  K  K6  2  0.0000  0.0000  0.0000  1
  Rb  Rb7  2  0.0000  0.5000  0.5000  1
  Na  Na8  8  0.1450  0.4004  0.5000  1
]