data_[K4Na8Pb4]
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
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [P2_1/c]
_cell_length_a [9.4434]
_cell_length_b [6.4121]
_cell_length_c [11.3313]
_cell_angle_alpha [90.0000]
_cell_angle_beta [122.7344]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [14]
_chemical_formula_structural [KNa2Pb]
_chemical_formula_sum '[K4 Na8 Pb4]'
_cell_volume [577.1651]
_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  4  0.4413  0.0982  0.6598  1.0
  Na  Na1  4  0.0918  0.7465  0.5623  1.0
  Na  Na2  4  0.1266  0.1025  0.2921  1.0
  Pb  Pb3  4  0.2922  0.5738  0.4113  1.0
]