data_[Np2Hg4Br16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Np  1.3600  1.7500  1.0000
  Hg  2.0000  1.5000  1.2450
  Br  2.9600  1.1500  0.8825
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [13.6798]
_cell_length_b [9.7483]
_cell_length_c [6.7959]
_cell_angle_alpha [90.0000]
_cell_angle_beta [95.8763]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Np(HgBr4)2]
_chemical_formula_sum '[Np2 Hg4 Br16]'
_cell_volume [901.5010]
_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  0.0000  1
  Hg  Hg1  4  0.2182  0.0000  0.7201  1
  Br  Br2  8  0.0868  0.2018  0.7762  1
  Br  Br3  4  0.1023  0.5000  0.2967  1
  Br  Br4  4  0.1682  0.0000  0.2547  1
]