data_[Na3Nb12Ge3N24]
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
  Ge  2.0100  1.2500  0.7700
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [R3m]
_cell_length_a [6.2069]
_cell_length_b [6.2069]
_cell_length_c [15.4193]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [160]
_chemical_formula_structural [NaNb4GeN8]
_chemical_formula_sum '[Na3 Nb12 Ge3 N24]'
_cell_volume [514.4542]
_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
[
  Na  Na0  3  0.0000  0.0000  0.9987  1
  Nb  Nb1  9  0.1698  0.3395  0.8312  1
  Nb  Nb2  3  0.0000  0.0000  0.6211  1
  Ge  Ge3  3  0.0000  0.0000  0.3821  1
  N  N4  9  0.1674  0.3347  0.5729  1
  N  N5  9  0.1683  0.3365  0.0930  1
  N  N6  3  0.0000  0.0000  0.2511  1
  N  N7  3  0.0000  0.0000  0.7554  1
]