data_[Pm12Sn4Pb8]
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 [Pnma]
_cell_length_a [13.1418]
_cell_length_b [4.6649]
_cell_length_c [12.2584]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [62]
_chemical_formula_structural [Pm3SnPb2]
_chemical_formula_sum '[Pm12 Sn4 Pb8]'
_cell_volume [751.5102]
_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  4  0.0508  0.2500  0.3836  1
  Pm  Pm1  4  0.1245  0.7500  0.9380  1
  Pm  Pm2  4  0.2381  0.2500  0.7096  1
  Sn  Sn3  4  0.1207  0.2500  0.1223  1
  Pb  Pb4  4  0.0118  0.2500  0.7856  1
  Pb  Pb5  4  0.1852  0.7500  0.4856  1
]