data_[Na4Pm10Sn8]
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
  Sn  1.9600  1.4500  0.8300
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [16.3434]
_cell_length_b [5.4738]
_cell_length_c [7.6399]
_cell_angle_alpha [90.0000]
_cell_angle_beta [94.6020]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na2Pm5Sn4]
_chemical_formula_sum '[Na4 Pm10 Sn8]'
_cell_volume [681.2673]
_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  0.1405  0.5000  0.7057  1
  Pm  Pm1  4  0.1510  0.0000  0.4723  1
  Pm  Pm2  4  0.1674  0.0000  0.0207  1
  Pm  Pm3  2  0.0000  0.5000  0.0000  1
  Sn  Sn4  4  0.0140  0.0000  0.7575  1
  Sn  Sn5  4  0.1860  0.5000  0.2524  1
]