data_[Rb8Np4Ge4Se20]
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
  Ge  2.0100  1.2500  0.7700
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Cmc2_1]
_cell_length_a [4.2542]
_cell_length_b [20.0918]
_cell_length_c [14.6854]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [36]
_chemical_formula_structural [Rb2NpGeSe5]
_chemical_formula_sum '[Rb8 Np4 Ge4 Se20]'
_cell_volume [1255.2465]
_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  4  0.0000  0.1266  0.3310  1
  Rb  Rb1  4  0.0000  0.1271  0.6866  1
  Np  Np2  4  0.0000  0.1983  0.0307  1
  Ge  Ge3  4  0.0000  0.4369  0.4194  1
  Se  Se4  4  0.0000  0.0514  0.0162  1
  Se  Se5  4  0.0000  0.3070  0.6527  1
  Se  Se6  4  0.0000  0.3157  0.3947  1
  Se  Se7  4  0.0000  0.3274  0.0093  1
  Se  Se8  4  0.0000  0.4937  0.2834  1
]