data_[Rb2Ce2Si2Se8]
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
  Si  1.9000  1.1000  0.5400
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [6.8351]
_cell_length_b [7.0069]
_cell_length_c [9.5469]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [RbCeSiSe4]
_chemical_formula_sum '[Rb2 Ce2 Si2 Se8]'
_cell_volume [434.8473]
_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  2  0.2630  0.2500  0.0640  1.0
  Ce  Ce1  2  0.2332  0.2500  0.5506  1.0
  Si  Si2  2  0.2122  0.7500  0.3243  1.0
  Se  Se3  4  0.0085  0.5050  0.7151  1.0
  Se  Se4  2  0.4053  0.7500  0.5672  1.0
  Se  Se5  2  0.4085  0.7500  0.1714  1.0
]