data_[K16Na24]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Na  0.9300  1.8000  1.1600
]
_symmetry_space_group_name_H-M [Fdd2]
_cell_length_a [12.6589]
_cell_length_b [20.2529]
_cell_length_c [7.9569]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [43]
_chemical_formula_structural [K2Na3]
_chemical_formula_sum '[K16 Na24]'
_cell_volume [2039.9962]
_cell_formula_units_Z [8]
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  16  0.0718  0.1990  0.2366  1.0
  Na  Na1  16  0.0677  0.1170  0.7432  1.0
  Na  Na2  8  0.0000  0.0000  0.4105  1.0
]