data_[Pm8Sm2N8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Sm  1.1700  1.8500  1.2290
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [I-42m]
_cell_length_a [5.9241]
_cell_length_b [5.9241]
_cell_length_c [11.0170]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [121]
_chemical_formula_structural [Pm4SmN4]
_chemical_formula_sum '[Pm8 Sm2 N8]'
_cell_volume [386.6422]
_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  4  0.0000  0.0000  0.2872  1
  Pm  Pm1  4  0.0000  0.5000  0.0000  1
  Sm  Sm2  2  0.0000  0.0000  0.0000  1
  N  N3  8  0.2371  0.2371  0.1188  1
]