data_[Pm8Al8Ni4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Al  1.6100  1.2500  0.6750
  Ni  1.9100  1.3500  0.7400
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [10.5627]
_cell_length_b [4.5727]
_cell_length_c [10.3021]
_cell_angle_alpha [90.0000]
_cell_angle_beta [117.2030]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Pm2Al2Ni]
_chemical_formula_sum '[Pm8 Al8 Ni4]'
_cell_volume [442.5578]
_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  0.0913  0.0000  0.8991  1
  Pm  Pm1  4  0.1649  0.5000  0.6763  1
  Al  Al2  4  0.0984  0.0000  0.4430  1
  Al  Al3  4  0.1217  0.5000  0.1328  1
  Ni  Ni4  4  0.1439  0.5000  0.3793  1
]