data_[Pm20Sb8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Sb  2.0500  1.4500  0.8300
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [16.5269]
_cell_length_b [6.3847]
_cell_length_c [8.5332]
_cell_angle_alpha [90.0000]
_cell_angle_beta [96.1901]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Pm5Sb2]
_chemical_formula_sum '[Pm20 Sb8]'
_cell_volume [895.1797]
_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  0.0918  0.1399  0.9275  1
  Pm  Pm1  8  0.2309  0.4282  0.3257  1
  Pm  Pm2  4  0.0000  0.3480  0.2500  1
  Sb  Sb3  8  0.1033  0.3275  0.5798  1
]