data_[Rb8Ce4Cd4Se16]
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
  Cd  1.6900  1.5500  1.0900
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Imma]
_cell_length_a [8.8568]
_cell_length_b [8.8605]
_cell_length_c [12.9226]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [74]
_chemical_formula_structural [Rb2CeCdSe4]
_chemical_formula_sum '[Rb8 Ce4 Cd4 Se16]'
_cell_volume [1014.1017]
_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  0.0000  0.5000  1.0
  Rb  Rb1  4  0.2500  0.2500  0.2500  1.0
  Ce  Ce2  4  0.0000  0.0000  0.0000  1.0
  Cd  Cd3  4  0.2500  0.2500  0.7500  1.0
  Se  Se4  8  0.0000  0.0415  0.7731  1.0
  Se  Se5  8  0.2098  0.2500  0.9945  1.0
]