data_[Cr3N3]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Cr  1.6600  1.4000  0.9400
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [P31m]
_cell_length_a [5.1666]
_cell_length_b [5.1666]
_cell_length_c [16.1896]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [157]
_chemical_formula_structural [CrN]
_chemical_formula_sum '[Cr3 N3]'
_cell_volume [374.2572]
_cell_formula_units_Z [3]
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
[
  Cr  Cr0  3  0.0000  0.6794  0.5004  1
  N  N1  2  0.3333  0.6667  0.4751  1
  N  N2  1  0.0000  0.0000  0.5486  1
]