data_[Pm4Ni20Pb4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Ni  1.9100  1.3500  0.7400
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [Pnma]
_cell_length_a [8.2266]
_cell_length_b [4.9564]
_cell_length_c [10.4452]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [62]
_chemical_formula_structural [PmNi5Pb]
_chemical_formula_sum '[Pm4 Ni20 Pb4]'
_cell_volume [425.8961]
_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  0.2476  0.7500  0.5610  1
  Ni  Ni1  8  0.0681  0.5023  0.3129  1
  Ni  Ni2  4  0.0532  0.7500  0.1100  1
  Ni  Ni3  4  0.0784  0.2500  0.5174  1
  Ni  Ni4  4  0.1856  0.2500  0.7401  1
  Pb  Pb5  4  0.1384  0.7500  0.8640  1
]