data_[Rb8Cd4Se8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Cd  1.6900  1.5500  1.0900
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Cmc2_1]
_cell_length_a [4.4814]
_cell_length_b [21.3307]
_cell_length_c [7.8633]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [36]
_chemical_formula_structural [Rb2CdSe2]
_chemical_formula_sum '[Rb8 Cd4 Se8]'
_cell_volume [751.6657]
_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  0.0271  0.2061  1.0
  Rb  Rb1  4  0.0000  0.1947  0.9804  1.0
  Cd  Cd2  4  0.0000  0.3707  0.1034  1.0
  Se  Se3  4  0.0000  0.1694  0.4513  1.0
  Se  Se4  4  0.0000  0.4252  0.3932  1.0
]