data_[Np4Bi4Se14]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Np  1.3600  1.7500  1.0000
  Bi  2.0200  1.6000  1.0350
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Imm2]
_cell_length_a [4.1338]
_cell_length_b [16.1019]
_cell_length_c [8.9386]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [44]
_chemical_formula_structural [Np2Bi2Se7]
_chemical_formula_sum '[Np4 Bi4 Se14]'
_cell_volume [594.9708]
_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
[
  Np  Np0  2  0.0000  0.0000  0.1985  1
  Np  Np1  2  0.0000  0.5000  0.1575  1
  Bi  Bi2  4  0.0000  0.2329  0.4621  1
  Se  Se3  4  0.0000  0.1208  0.7054  1
  Se  Se4  4  0.0000  0.1812  0.1112  1
  Se  Se5  4  0.0000  0.4056  0.8762  1
  Se  Se6  2  0.0000  0.5000  0.4805  1
]