data_[K3Na6Pb3F18]
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
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [6.0846]
_cell_length_b [6.0846]
_cell_length_c [15.8963]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [KNa2PbF6]
_chemical_formula_sum '[K3 Na6 Pb3 F18]'
_cell_volume [509.6718]
_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  0.7990  1.0
  Na  Na1  3  0.0000  0.0000  0.0159  1.0
  Na  Na2  3  0.0000  0.0000  0.5238  1.0
  Pb  Pb3  3  0.0000  0.0000  0.3149  1.0
  F  F4  9  0.0189  0.3474  0.5906  1.0
  F  F5  9  0.0894  0.7165  0.0788  1.0
]