data_[K20Rb16Na24]
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 [Cmc2_1]
_cell_length_a [4.7366]
_cell_length_b [34.6764]
_cell_length_c [22.8624]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [36]
_chemical_formula_structural [K5(Rb2Na3)2]
_chemical_formula_sum '[K20 Rb16 Na24]'
_cell_volume [3755.1238]
_cell_formula_units_Z [4]
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  4  0.0000  0.0258  0.5205  1
  Rb  Rb1  4  0.0000  0.0760  0.7996  1
  Rb  Rb2  4  0.0000  0.1118  0.2835  1
  Rb  Rb3  4  0.0000  0.1809  0.9511  1
  K  K4  4  0.0000  0.1967  0.5916  1
  K  K5  4  0.0000  0.3029  0.2618  1
  K  K6  4  0.0000  0.3182  0.6357  1
  K  K7  4  0.0000  0.3690  0.9555  1
  K  K8  4  0.0000  0.4827  0.6822  1
  Na  Na9  4  0.0000  0.0907  0.0830  1
  Na  Na10  4  0.0000  0.2223  0.4181  1
  Na  Na11  4  0.0000  0.2861  0.8049  1
  Na  Na12  4  0.0000  0.3984  0.1400  1
  Na  Na13  4  0.0000  0.4277  0.4624  1
  Na  Na14  4  0.0000  0.4802  0.8655  1
]