data_[Np4U8Si4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Np  1.3600  1.7500  1.0000
  U  1.3800  1.7500  0.9913
  Si  1.9000  1.1000  0.5400
]
_symmetry_space_group_name_H-M [P2/c]
_cell_length_a [5.0824]
_cell_length_b [6.1207]
_cell_length_c [10.0924]
_cell_angle_alpha [90.0000]
_cell_angle_beta [104.9636]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [13]
_chemical_formula_structural [NpU2Si]
_chemical_formula_sum '[Np4 U8 Si4]'
_cell_volume [303.3040]
_cell_formula_units_Z [4]
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  4  0.1516  0.1235  0.1205  1
  U  U1  4  0.1031  0.3401  0.5938  1
  U  U2  4  0.4157  0.3493  0.3776  1
  Si  Si3  4  0.3604  0.1287  0.8638  1
]