data_[Rb8Sn4Bi4Se20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Sn  1.9600  1.4500  0.8300
  Bi  2.0200  1.6000  1.0350
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Cmc2_1]
_cell_length_a [4.0334]
_cell_length_b [21.7141]
_cell_length_c [14.8699]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [36]
_chemical_formula_structural [Rb2SnBiSe5]
_chemical_formula_sum '[Rb8 Sn4 Bi4 Se20]'
_cell_volume [1302.3240]
_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  0.1217  0.6794  1.0
  Rb  Rb1  4  0.0000  0.1258  0.3117  1.0
  Sn  Sn2  4  0.0000  0.4355  0.4280  1.0
  Bi  Bi3  4  0.0000  0.2171  0.0346  1.0
  Se  Se4  4  0.0000  0.0438  0.0374  1.0
  Se  Se5  4  0.0000  0.2832  0.6674  1.0
  Se  Se6  4  0.0000  0.3202  0.3863  1.0
  Se  Se7  4  0.0000  0.3372  0.9961  1.0
  Se  Se8  4  0.0000  0.4943  0.2832  1.0
]