data_[Rb4Tl10Hg8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Tl  1.6200  1.9000  1.3325
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [7.0450]
_cell_length_b [9.9458]
_cell_length_c [10.7948]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [Rb2Tl5Hg4]
_chemical_formula_sum '[Rb4 Tl10 Hg8]'
_cell_volume [756.3730]
_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  0.0000  0.0000  0.3035  1.0
  Tl  Tl1  8  0.2475  0.1707  0.0000  1.0
  Tl  Tl2  2  0.0000  0.5000  0.0000  1.0
  Hg  Hg3  8  0.0000  0.3439  0.2532  1.0
]