data_[K6Na8Bi8]
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
  Bi  2.0200  1.6000  1.0350
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [5.4846]
_cell_length_b [8.2534]
_cell_length_c [18.1128]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [K3(NaBi)4]
_chemical_formula_sum '[K6 Na8 Bi8]'
_cell_volume [819.8992]
_cell_formula_units_Z [2]
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  0.0000  0.0000  0.1295  1.0
  K  K1  2  0.0000  0.5000  0.0000  1.0
  Na  Na2  8  0.0000  0.2074  0.3233  1.0
  Bi  Bi3  4  0.0000  0.3246  0.5000  1.0
  Bi  Bi4  4  0.0000  0.5000  0.2013  1.0
]