data_[Rb8Ce4Sb4Se20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Ce  1.1200  1.8500  1.0800
  Sb  2.0500  1.4500  0.8300
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Cmc2_1]
_cell_length_a [4.5907]
_cell_length_b [19.8907]
_cell_length_c [14.4297]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [36]
_chemical_formula_structural [Rb2CeSbSe5]
_chemical_formula_sum '[Rb8 Ce4 Sb4 Se20]'
_cell_volume [1317.6152]
_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  0.1232  0.6791  1
  Rb  Rb1  4  0.0000  0.1295  0.3298  1
  Ce  Ce2  4  0.0000  0.2046  0.0343  1
  Sb  Sb3  4  0.0000  0.4432  0.4296  1
  Se  Se4  4  0.0000  0.0465  0.0238  1
  Se  Se5  4  0.0000  0.3059  0.6516  1
  Se  Se6  4  0.0000  0.3150  0.3939  1
  Se  Se7  4  0.0000  0.3361  0.0057  1
  Se  Se8  4  0.0000  0.4987  0.2761  1
]