data_[Tl4Sn10Hg8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tl  1.6200  1.9000  1.3325
  Sn  1.9600  1.4500  0.8300
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [19.6909]
_cell_length_b [4.5839]
_cell_length_c [8.5716]
_cell_angle_alpha [90.0000]
_cell_angle_beta [114.1681]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Tl2Sn5Hg4]
_chemical_formula_sum '[Tl4 Sn10 Hg8]'
_cell_volume [705.8691]
_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
[
  Tl  Tl0  4  0.1875  0.5000  0.8646  1
  Sn  Sn1  4  0.0842  0.0000  0.5589  1
  Sn  Sn2  4  0.1047  0.5000  0.3684  1
  Sn  Sn3  2  0.0000  0.5000  0.0000  1
  Hg  Hg4  4  0.0826  0.0000  0.9272  1
  Hg  Hg5  4  0.2478  0.5000  0.3457  1
]