data_[Rb8Np4Br20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Np  1.3600  1.7500  1.0000
  Br  2.9600  1.1500  0.8825
]
_symmetry_space_group_name_H-M [Pnma]
_cell_length_a [14.0735]
_cell_length_b [9.4030]
_cell_length_c [8.8131]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [62]
_chemical_formula_structural [Rb2NpBr5]
_chemical_formula_sum '[Rb8 Np4 Br20]'
_cell_volume [1166.2680]
_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
[
  Rb  Rb0  8  0.1700  0.5052  0.4405  1
  Np  Np1  4  0.0023  0.7500  0.9352  1
  Br  Br2  8  0.0723  0.0412  0.8377  1
  Br  Br3  4  0.0099  0.7500  0.5938  1
  Br  Br4  4  0.1769  0.7500  0.1168  1
  Br  Br5  4  0.1982  0.2500  0.1531  1
]