data_[K18Rb24Na3]
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 [R-3]
_cell_length_a [12.8390]
_cell_length_b [12.8390]
_cell_length_c [25.7406]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [148]
_chemical_formula_structural [K6Rb8Na]
_chemical_formula_sum '[K18 Rb24 Na3]'
_cell_volume [3674.6116]
_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  0.0156  0.3715  0.3419  1.0
  Rb  Rb1  18  0.0697  0.2413  0.1703  1.0
  Rb  Rb2  6  0.0000  0.0000  0.4115  1.0
  Na  Na3  3  0.0000  0.0000  0.0000  1.0
]