data_[Ba6Hg4I2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ba  0.8900  2.1500  1.4900
  Hg  2.0000  1.5000  1.2450
  I  2.6600  1.4000  1.2733
]
_symmetry_space_group_name_H-M [Cmmm]
_cell_length_a [6.1264]
_cell_length_b [18.3301]
_cell_length_c [4.1493]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [65]
_chemical_formula_structural [Ba3Hg2I]
_chemical_formula_sum '[Ba6 Hg4 I2]'
_cell_volume [465.9539]
_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
[
  Ba  Ba0  4  0.0000  0.1754  0.5000  1
  Ba  Ba1  2  0.0000  0.5000  0.5000  1
  Hg  Hg2  4  0.0000  0.3315  0.0000  1
  I  I3  2  0.0000  0.0000  0.0000  1
]