data_[Ac4Cr4N4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ac  1.1000  1.9500  1.2600
  Cr  1.6600  1.4000  0.9400
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [Pnma]
_cell_length_a [9.5684]
_cell_length_b [3.7740]
_cell_length_c [6.5470]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [62]
_chemical_formula_structural [AcCrN]
_chemical_formula_sum '[Ac4 Cr4 N4]'
_cell_volume [236.4193]
_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
[
  Ac  Ac0  4  0.1771  0.7500  0.8979  1
  Cr  Cr1  4  0.0369  0.7500  0.3881  1
  N  N2  4  0.0484  0.2500  0.3480  1
]