data_[Na2Np8S16]
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
  S  2.5800  1.0000  0.8800
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [13.7747]
_cell_length_b [8.0102]
_cell_length_c [9.7118]
_cell_angle_alpha [90.0000]
_cell_angle_beta [134.5205]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na(NpS2)4]
_chemical_formula_sum '[Na2 Np8 S16]'
_cell_volume [764.0385]
_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  2  0.0000  0.5000  0.5000  1
  Np  Np1  4  0.0000  0.2477  0.0000  1
  Np  Np2  4  0.2345  0.0000  0.4986  1
  S  S3  8  0.2320  0.2656  0.6664  1
  S  S4  4  0.0045  0.5000  0.8185  1
  S  S5  4  0.0248  0.0000  0.8403  1
]