data_[Pm4Sn12Pb2]
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
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [4.2919]
_cell_length_b [10.2677]
_cell_length_c [13.7284]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [Pm2Sn6Pb]
_chemical_formula_sum '[Pm4 Sn12 Pb2]'
_cell_volume [604.9802]
_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
[
  Pm  Pm0  4  0.0000  0.0000  0.1445  1
  Sn  Sn1  8  0.0000  0.2091  0.3181  1
  Sn  Sn2  4  0.0000  0.3544  0.5000  1
  Pb  Pb3  2  0.0000  0.0000  0.5000  1
]