data_[Pm20Sn8N4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Sn  1.9600  1.4500  0.8300
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [Cmcm]
_cell_length_a [5.6932]
_cell_length_b [15.8549]
_cell_length_c [11.8858]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [Pm5Sn2N]
_chemical_formula_sum '[Pm20 Sn8 N4]'
_cell_volume [1072.8739]
_cell_formula_units_Z [4]
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
[
  Pm  Pm0  8  0.0000  0.0696  0.1172  1
  Pm  Pm1  8  0.0000  0.2856  0.0892  1
  Pm  Pm2  4  0.0000  0.3156  0.7500  1
  Sn  Sn3  8  0.0000  0.1377  0.6224  1
  N  N4  4  0.0000  0.1799  0.2500  1
]