data_LaHgCl2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.6
_cell_length_b   3.6
_cell_length_c   10.69
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   LaHgCl2
_chemical_formula_sum   'La1 Hg1 Cl2'
_cell_volume   138.5
_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
  La  La3  1  0.0  0.0  0.0  1.0
  Hg  Hg2  1  0.0  0.0  0.35  1.0
  Cl  Cl0  1  0.8  0.8  0.62  1.0
  Cl  Cl1  1  0.8  0.8  0.07  1.0

data_LaHgCl2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.09
_cell_length_b   5.09
_cell_length_c   10.69
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   LaHgCl2
_chemical_formula_sum   'La2 Hg2 Cl4'
_cell_volume   277.01
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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
  La  La0  2  0.0  0.0  0.0  1.0
  Hg  Hg1  2  0.0  0.0  0.35  1.0
  Cl  Cl2  2  0.3  0.5  0.07  1.0
  Cl  Cl3  2  0.3  0.5  0.62  1.0

La Hg Cl Cl
La Hg Cl Cl 0 3 - - o 0 1 o o o 1 3 - - o 1 2 - - o 1 1 + o o 1 1 o + o 2 2 + o o 2 2 o + o 
LaHgCl2 crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two LaHgCl2 clusters. La(1) is bonded in a single-bond geometry to one Cl(2) atom. The La(1)-Cl(2) bond length is 1.29 Å. Hg(1) is bonded in a distorted bent 150 degrees geometry to one Cl(1) and one Cl(2) atom. The Hg(1)-Cl(1) bond length is 3.08 Å. The Hg(1)-Cl(2) bond length is 3.08 Å. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a single-bond geometry to one Hg(1) atom. In the second Cl site, Cl(2) is bonded in a single-bond geometry to one La(1) and one Hg(1) atom.