data_[K20Na4]
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 [I4/mcm]
_cell_length_a [9.9281]
_cell_length_b [9.9281]
_cell_length_c [17.2043]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [140]
_chemical_formula_structural [K5Na]
_chemical_formula_sum '[K20 Na4]'
_cell_volume [1695.7878]
_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
[
  K  K0  16  0.1586  0.3414  0.3579  1.0
  K  K1  4  0.0000  0.0000  0.0000  1.0
  Na  Na2  4  0.0000  0.0000  0.2500  1.0
]