data_[Rb20Cd8Hg8]
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
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [Ima2]
_cell_length_a [21.1206]
_cell_length_b [9.7918]
_cell_length_c [9.2710]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [46]
_chemical_formula_structural [Rb5(CdHg)2]
_chemical_formula_sum '[Rb20 Cd8 Hg8]'
_cell_volume [1917.3222]
_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  8  0.0658  0.1679  0.8005  1
  Rb  Rb1  8  0.1512  0.6831  0.6230  1
  Rb  Rb2  4  0.2500  0.1288  0.4548  1
  Cd  Cd3  8  0.0682  0.5369  0.9452  1
  Hg  Hg4  4  0.0000  0.0000  0.1502  1
  Hg  Hg5  4  0.2500  0.5156  0.3216  1
]