data_[Pm4Se2N2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Se  2.5500  1.1500  1.0133
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [P6_3/mmc]
_cell_length_a [3.7884]
_cell_length_b [3.7884]
_cell_length_c [13.5941]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [194]
_chemical_formula_structural [Pm2SeN]
_chemical_formula_sum '[Pm4 Se2 N2]'
_cell_volume [168.9636]
_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  0.3333  0.6667  0.4003  1
  Se  Se1  2  0.3333  0.6667  0.7500  1
  N  N2  2  0.0000  0.0000  0.0000  1
]