data_[Na4Nb2V2N8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Nb  1.6000  1.4500  0.8200
  V  1.6300  1.3500  0.7775
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [Pmn2_1]
_cell_length_a [6.5043]
_cell_length_b [6.5493]
_cell_length_c [5.5372]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [31]
_chemical_formula_structural [Na2NbVN4]
_chemical_formula_sum '[Na4 Nb2 V2 N8]'
_cell_volume [235.8787]
_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  4  0.2499  0.6620  0.5152  1.0
  Nb  Nb1  2  0.0000  0.1443  0.5003  1.0
  V  V2  2  0.0000  0.8425  0.9990  1.0
  N  N3  4  0.2416  0.7043  0.0673  1.0
  N  N4  2  0.0000  0.0854  0.1556  1.0
  N  N5  2  0.0000  0.8894  0.6802  1.0
]