data_[K3Rb36Na18]
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 [15.2853]
_cell_length_b [15.2853]
_cell_length_c [20.1118]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [148]
_chemical_formula_structural [K(Rb2Na)6]
_chemical_formula_sum '[K3 Rb36 Na18]'
_cell_volume [4069.3934]
_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
[
  Rb  Rb0  18  0.0292  0.1934  0.8148  1.0
  Rb  Rb1  18  0.0524  0.8380  0.4101  1.0
  K  K2  3  0.0000  0.0000  0.0000  1.0
  Na  Na3  18  0.0425  0.4463  0.6972  1.0
]