data_[Na2Np2Fe2N6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Np  1.3600  1.7500  1.0000
  Fe  1.8300  1.4000  0.8525
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [6.9012]
_cell_length_b [3.3962]
_cell_length_c [8.0778]
_cell_angle_alpha [90.0000]
_cell_angle_beta [101.3901]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [NaNpFeN3]
_chemical_formula_sum '[Na2 Np2 Fe2 N6]'
_cell_volume [185.6005]
_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
[
  Na  Na0  2  0.1686  0.7500  0.1702  1
  Np  Np1  2  0.3389  0.2500  0.8402  1
  Fe  Fe2  2  0.0536  0.7500  0.6035  1
  N  N3  2  0.1379  0.7500  0.8404  1
  N  N4  2  0.1604  0.2500  0.5696  1
  N  N5  2  0.4536  0.2500  0.1238  1
]