data_[Pm2Al4Ni18]
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 [P4/mbm]
_cell_length_a [8.0916]
_cell_length_b [8.0916]
_cell_length_c [4.7363]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [127]
_chemical_formula_structural [PmAl2Ni9]
_chemical_formula_sum '[Pm2 Al4 Ni18]'
_cell_volume [310.1041]
_cell_formula_units_Z [2]
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  2  0.0000  0.0000  0.0000  1
  Al  Al1  4  0.1200  0.3800  0.0000  1
  Ni  Ni2  8  0.0662  0.2112  0.5000  1
  Ni  Ni3  8  0.1768  0.6768  0.2406  1
  Ni  Ni4  2  0.0000  0.5000  0.5000  1
]