data_[K21Rb36Na3]
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 [26.0176]
_cell_length_b [26.0176]
_cell_length_c [8.6215]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [148]
_chemical_formula_structural [K7Rb12Na]
_chemical_formula_sum '[K21 Rb36 Na3]'
_cell_volume [5054.1377]
_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  0.0172  0.4193  0.5266  1.0
  K  K1  18  0.0571  0.8989  0.8323  1.0
  Rb  Rb2  18  0.1001  0.8688  0.3423  1.0
  K  K3  3  0.0000  0.0000  0.5000  1.0
  Na  Na4  3  0.0000  0.0000  0.0000  1.0
]