data_[Pm16Sm4Pb4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Sm  1.1700  1.8500  1.2290
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [I4_1md]
_cell_length_a [11.7225]
_cell_length_b [11.7225]
_cell_length_c [6.9009]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [109]
_chemical_formula_structural [Pm4SmPb]
_chemical_formula_sum '[Pm16 Sm4 Pb4]'
_cell_volume [948.2910]
_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  0.2303  0.9880  1
  Pm  Pm1  8  0.0000  0.2388  0.4813  1
  Sm  Sm2  4  0.0000  0.0000  0.7848  1
  Pb  Pb3  4  0.0000  0.0000  0.2765  1
]