data_[Pm2Nd8S8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Nd  1.1400  1.8500  1.2765
  S  2.5800  1.0000  0.8800
]
_symmetry_space_group_name_H-M [I4/m]
_cell_length_a [9.0208]
_cell_length_b [9.0208]
_cell_length_c [5.7384]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [87]
_chemical_formula_structural [Pm(NdS)4]
_chemical_formula_sum '[Pm2 Nd8 S8]'
_cell_volume [466.9607]
_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
  Nd  Nd1  8  0.1032  0.3037  0.5000  1
  S  S2  8  0.0991  0.2997  0.0000  1
]