data_[Rb4Ca2Cd4Se8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Ca  1.0000  1.8000  1.1400
  Cd  1.6900  1.5500  1.0900
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [16.5812]
_cell_length_b [4.3838]
_cell_length_c [8.2591]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.5636]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Rb2Ca(CdSe2)2]
_chemical_formula_sum '[Rb4 Ca2 Cd4 Se8]'
_cell_volume [569.1109]
_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  4  0.1235  0.0000  0.5477  1.0
  Ca  Ca1  2  0.0000  0.0000  0.0000  1.0
  Cd  Cd2  4  0.1691  0.5000  0.9791  1.0
  Se  Se3  4  0.0148  0.5000  0.7637  1.0
  Se  Se4  4  0.2057  0.0000  0.1861  1.0
]