data_[Na2Pm14Pb8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Pm  1.1300  1.8500  1.1100
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [14.7442]
_cell_length_b [5.7906]
_cell_length_c [11.6989]
_cell_angle_alpha [90.0000]
_cell_angle_beta [127.0657]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [NaPm7Pb4]
_chemical_formula_sum '[Na2 Pm14 Pb8]'
_cell_volume [797.0039]
_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  0.0000  1
  Pm  Pm1  4  0.0702  0.0000  0.3324  1
  Pm  Pm2  4  0.1564  0.5000  0.5814  1
  Pm  Pm3  4  0.2160  0.0000  0.8681  1
  Pm  Pm4  2  0.0000  0.5000  0.0000  1
  Pb  Pb5  4  0.0777  0.5000  0.7820  1
  Pb  Pb6  4  0.2072  0.5000  0.3359  1
]