data_[Pm8Ni16Sn12]
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
  Sn  1.9600  1.4500  0.8300
]
_symmetry_space_group_name_H-M [Cmce]
_cell_length_a [6.0962]
_cell_length_b [16.0748]
_cell_length_c [6.9761]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [64]
_chemical_formula_structural [Pm2Ni4Sn3]
_chemical_formula_sum '[Pm8 Ni16 Sn12]'
_cell_volume [683.6254]
_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  0.1035  0.4182  1
  Ni  Ni1  8  0.0000  0.1644  0.0059  1
  Ni  Ni2  8  0.2500  0.0740  0.7500  1
  Sn  Sn3  8  0.2500  0.2385  0.7500  1
  Sn  Sn4  4  0.0000  0.0000  0.0000  1
]