data_[Rb4Sn8Hg4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Sn  1.9600  1.4500  0.8300
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [Pnma]
_cell_length_a [8.5545]
_cell_length_b [5.1718]
_cell_length_c [13.1463]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [62]
_chemical_formula_structural [RbSn2Hg]
_chemical_formula_sum '[Rb4 Sn8 Hg4]'
_cell_volume [581.6189]
_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  0.1274  0.2500  0.8679  1.0
  Sn  Sn1  4  0.0436  0.2500  0.3552  1.0
  Sn  Sn2  4  0.1998  0.2500  0.1568  1.0
  Hg  Hg3  4  0.1639  0.2500  0.5644  1.0
]