data_[Sr2Tl2Hg4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sr  0.9500  2.0000  1.3200
  Tl  1.6200  1.9000  1.3325
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [Imm2]
_cell_length_a [4.4916]
_cell_length_b [5.4479]
_cell_length_c [9.7739]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [44]
_chemical_formula_structural [SrTlHg2]
_chemical_formula_sum '[Sr2 Tl2 Hg4]'
_cell_volume [239.1645]
_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
[
  Sr  Sr0  2  0.0000  0.5000  0.4944  1.0
  Tl  Tl1  2  0.0000  0.0000  0.2648  1.0
  Hg  Hg2  2  0.0000  0.0000  0.7339  1.0
  Hg  Hg3  2  0.0000  0.5000  0.0069  1.0
]