data_[Rb20Hg8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [20.8619]
_cell_length_b [8.4311]
_cell_length_c [9.9532]
_cell_angle_alpha [90.0000]
_cell_angle_beta [98.0928]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Rb5Hg2]
_chemical_formula_sum '[Rb20 Hg8]'
_cell_volume [1733.2258]
_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  0.0896  0.1192  0.9254  1.0
  Rb  Rb1  8  0.2200  0.4174  0.3173  1.0
  Rb  Rb2  4  0.0000  0.4107  0.2500  1.0
  Hg  Hg3  8  0.1101  0.2960  0.5817  1.0
]