data_[Na4Pb2F8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  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 [C2/m]
_cell_length_a [11.9998]
_cell_length_b [4.3460]
_cell_length_c [4.2413]
_cell_angle_alpha [90.0000]
_cell_angle_beta [99.4208]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na2PbF4]
_chemical_formula_sum '[Na4 Pb2 F8]'
_cell_volume [218.2012]
_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
[
  Na  Na0  4  0.1872  0.5000  0.6213  1.0
  Pb  Pb1  2  0.0000  0.0000  0.0000  1.0
  F  F2  4  0.1211  0.5000  0.0792  1.0
  F  F3  4  0.1311  0.0000  0.5542  1.0
]