data_[Na4Np4Nb2S12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Np  1.3600  1.7500  1.0000
  Nb  1.6000  1.4500  0.8200
  S  2.5800  1.0000  0.8800
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [6.6717]
_cell_length_b [11.4281]
_cell_length_c [7.1666]
_cell_angle_alpha [90.0000]
_cell_angle_beta [107.9001]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na2Np2NbS6]
_chemical_formula_sum '[Na4 Np4 Nb2 S12]'
_cell_volume [519.9724]
_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
[
  Na  Na0  4  0.0000  0.1690  0.0000  1
  Np  Np1  4  0.0000  0.3346  0.5000  1
  Nb  Nb2  2  0.0000  0.0000  0.5000  1
  S  S3  8  0.2306  0.1588  0.7182  1
  S  S4  4  0.2386  0.0000  0.2802  1
]