data_Hg3Cl
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.97
_cell_length_b   3.97
_cell_length_c   8.21
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Hg3Cl
_chemical_formula_sum   'Hg3 Cl1'
_cell_volume   111.78
_cell_formula_units_Z   1
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
  Hg  Hg1  1  0.0  0.0  0.1  1.0
  Hg  Hg2  1  0.98  0.14  0.06  1.0
  Hg  Hg3  1  0.98  0.14  0.15  1.0
  Cl  Cl0  1  0.0  0.0  0.0  1.0

data_Hg3Cl
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.97
_cell_length_b   3.97
_cell_length_c   8.21
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Hg3Cl
_chemical_formula_sum   'Hg3 Cl1'
_cell_volume   111.78
_cell_formula_units_Z   1
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
  Hg  Hg0  1  0.0  0.0  0.1  1.0
  Hg  Hg1  1  0.98  0.14  0.06  1.0
  Hg  Hg2  1  0.98  0.14  0.15  1.0
  Cl  Cl3  1  0.0  0.0  0.0  1.0

Hg Hg Hg Cl
Hg3Cl is Indium-like structured and crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one Hg3Cl cluster. There are three inequivalent Hg sites. In the first Hg site, Hg(1) is bonded in a 2-coordinate geometry to one Hg(2), one Hg(3), and one Cl(1) atom. The Hg(1)-Hg(2) bond length is 0.72 Å. The Hg(1)-Hg(3) bond length is 0.72 Å. The Hg(1)-Cl(1) bond length is 0.85 Å. In the second Hg site, Hg(2) is bonded in a 3-coordinate geometry to one Hg(1), one Hg(3), and one Cl(1) atom. The Hg(2)-Hg(3) bond length is 0.74 Å. The Hg(2)-Cl(1) bond length is 0.77 Å. In the third Hg site, Hg(3) is bonded in a 2-coordinate geometry to one Hg(1) and one Hg(2) atom. Cl(1) is bonded in a 2-coordinate geometry to one Hg(1) and one Hg(2) atom.