data_[Rb2Na2Ce2Se6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Na  0.9300  1.8000  1.1600
  Ce  1.1200  1.8500  1.0800
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [8.6399]
_cell_length_b [4.3535]
_cell_length_c [10.5682]
_cell_angle_alpha [90.0000]
_cell_angle_beta [91.6150]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [RbNaCeSe3]
_chemical_formula_sum '[Rb2 Na2 Ce2 Se6]'
_cell_volume [397.3528]
_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  0.4364  0.2500  0.6777  1.0
  Na  Na1  2  0.1959  0.7500  0.0152  1.0
  Ce  Ce2  2  0.0665  0.2500  0.3234  1.0
  Se  Se3  2  0.0826  0.2500  0.8153  1.0
  Se  Se4  2  0.1882  0.7500  0.4883  1.0
  Se  Se5  2  0.3210  0.2500  0.1758  1.0
]