data_[Na4Fe4N4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Fe  1.8300  1.4000  0.8525
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [Imma]
_cell_length_a [3.5222]
_cell_length_b [4.9592]
_cell_length_c [10.3153]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [74]
_chemical_formula_structural [NaFeN]
_chemical_formula_sum '[Na4 Fe4 N4]'
_cell_volume [180.1820]
_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
[
  Na  Na0  4  0.0000  0.2500  0.9035  1.0
  Fe  Fe1  4  0.0000  0.2500  0.3237  1.0
  N  N2  4  0.0000  0.2500  0.1462  1.0
]