data_[Na2Li2Cu2N2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Li  0.9800  1.4500  0.9000
  Cu  1.9000  1.3500  0.8200
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [Imm2]
_cell_length_a [3.6275]
_cell_length_b [3.7620]
_cell_length_c [8.6616]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [44]
_chemical_formula_structural [NaLiCuN]
_chemical_formula_sum '[Na2 Li2 Cu2 N2]'
_cell_volume [118.2031]
_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  0.0000  0.0000  0.9829  1.0
  Li  Li1  2  0.0000  0.0000  0.2767  1.0
  Cu  Cu2  2  0.0000  0.0000  0.6613  1.0
  N  N3  2  0.0000  0.5000  0.1944  1.0
]