data_[Tb4Tl2Hg2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tb  1.1000  1.7500  0.9815
  Tl  1.6200  1.9000  1.3325
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [Pmma]
_cell_length_a [5.3539]
_cell_length_b [3.7486]
_cell_length_c [10.7096]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [51]
_chemical_formula_structural [Tb2TlHg]
_chemical_formula_sum '[Tb4 Tl2 Hg2]'
_cell_volume [214.9369]
_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
[
  Tb  Tb0  2  0.2500  0.0000  0.1190  1.0
  Tb  Tb1  2  0.2500  0.0000  0.6302  1.0
  Tl  Tl2  2  0.2500  0.5000  0.3730  1.0
  Hg  Hg3  2  0.2500  0.5000  0.8757  1.0
]