data_[K3Na6Bi3F18]
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
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [6.1345]
_cell_length_b [6.1345]
_cell_length_c [15.6830]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [KNa2BiF6]
_chemical_formula_sum '[K3 Na6 Bi3 F18]'
_cell_volume [511.1222]
_cell_formula_units_Z [3]
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  3  0.0000  0.0000  0.7984  1.0
  Na  Na1  3  0.0000  0.0000  0.0153  1.0
  Na  Na2  3  0.0000  0.0000  0.5265  1.0
  Bi  Bi3  3  0.0000  0.0000  0.3119  1.0
  F  F4  9  0.0281  0.3461  0.5925  1.0
  F  F5  9  0.0944  0.7142  0.0773  1.0
]