data_[Rb4Np4Bi2Se12]
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
  Bi  2.0200  1.6000  1.0350
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [7.3508]
_cell_length_b [12.7709]
_cell_length_c [8.4964]
_cell_angle_alpha [90.0000]
_cell_angle_beta [106.0549]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Rb2Np2BiSe6]
_chemical_formula_sum '[Rb4 Np4 Bi2 Se12]'
_cell_volume [766.5072]
_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
[
  Rb  Rb0  4  0.0000  0.1628  0.0000  1
  Np  Np1  4  0.0000  0.3339  0.5000  1
  Bi  Bi2  2  0.0000  0.0000  0.5000  1
  Se  Se3  8  0.2330  0.1724  0.6921  1
  Se  Se4  4  0.2178  0.5000  0.6940  1
]