data_[Na12Os4N8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Os  2.2000  1.3000  0.6730
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [Cmcm]
_cell_length_a [8.6921]
_cell_length_b [7.3648]
_cell_length_c [6.1308]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [Na3OsN2]
_chemical_formula_sum '[Na12 Os4 N8]'
_cell_volume [392.4667]
_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
[
  Na  Na0  8  0.2114  0.5000  0.0000  1
  Na  Na1  4  0.0000  0.2570  0.2500  1
  Os  Os2  4  0.0000  0.1583  0.7500  1
  N  N3  4  0.0000  0.0000  0.0000  1
  N  N4  4  0.0000  0.4057  0.7500  1
]