data_[K4Tl12Hg4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Tl  1.6200  1.9000  1.3325
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [Pnma]
_cell_length_a [10.6813]
_cell_length_b [4.5277]
_cell_length_c [13.9456]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [62]
_chemical_formula_structural [KTl3Hg]
_chemical_formula_sum '[K4 Tl12 Hg4]'
_cell_volume [674.4368]
_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
[
  K  K0  4  0.1722  0.2500  0.0010  1.0
  Tl  Tl1  4  0.0850  0.2500  0.3975  1.0
  Tl  Tl2  4  0.1068  0.7500  0.2161  1.0
  Tl  Tl3  4  0.1382  0.7500  0.7855  1.0
  Hg  Hg4  4  0.1270  0.2500  0.6169  1.0
]