data_[Na2Er2Pb2F12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Er  1.2400  1.7500  1.0300
  Pb  2.3300  1.8000  1.1225
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [P4_2nm]
_cell_length_a [5.3874]
_cell_length_b [5.3874]
_cell_length_c [11.0155]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [102]
_chemical_formula_structural [NaErPbF6]
_chemical_formula_sum '[Na2 Er2 Pb2 F12]'
_cell_volume [319.7100]
_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  2  0.0000  0.0000  0.6668  1.0
  Er  Er1  2  0.0000  0.0000  0.3315  1.0
  Pb  Pb2  2  0.0000  0.0000  0.9974  1.0
  F  F3  4  0.1798  0.8202  0.4857  1.0
  F  F4  4  0.1928  0.8072  0.1866  1.0
  F  F5  4  0.2132  0.7868  0.8299  1.0
]