data_[Ba6Nb2N6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ba  0.8900  2.1500  1.4900
  Nb  1.6000  1.4500  0.8200
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [P6_3/m]
_cell_length_a [8.3829]
_cell_length_b [8.3829]
_cell_length_c [5.8405]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [176]
_chemical_formula_structural [Ba3NbN3]
_chemical_formula_sum '[Ba6 Nb2 N6]'
_cell_volume [355.4405]
_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
[
  Ba  Ba0  6  0.1087  0.3619  0.7500  1
  Nb  Nb1  2  0.3333  0.6667  0.2500  1
  N  N2  6  0.1366  0.4084  0.2500  1
]