data_HfInHg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.41
_cell_length_b   4.41
_cell_length_c   4.44
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   HfInHg2
_chemical_formula_sum   'Hf1 In1 Hg2'
_cell_volume   86.53
_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
  Hf  Hf0  1  0.21  0.21  0.0  1.0
  In  In3  1  0.0  0.0  0.0  1.0
  Hg  Hg1  1  0.21  0.0  0.22  1.0
  Hg  Hg2  1  0.0  0.21  0.22  1.0

data_HfInHg2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.24
_cell_length_b   6.24
_cell_length_c   4.44
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   HfInHg2
_chemical_formula_sum   'Hf2 In2 Hg4'
_cell_volume   173.06
_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
  Hf  Hf0  2  0.21  0.0  0.0  1.0
  In  In1  2  0.0  0.0  0.0  1.0
  Hg  Hg2  4  0.1  0.1  0.22  1.0

Hf In Hg Hg
HfHg2In is alpha Po structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two HfHg2In clusters. Hf(1) is bonded in a 3-coordinate geometry to two equivalent Hg(1) and one In(1) atom. Both Hf(1)-Hg(1) bond lengths are 1.34 Å. The Hf(1)-In(1) bond length is 1.29 Å. Hg(1) is bonded in a 3-coordinate geometry to one Hf(1), one Hg(1), and one In(1) atom. The Hg(1)-Hg(1) bond length is 1.29 Å. The Hg(1)-In(1) bond length is 1.34 Å. In(1) is bonded in a 3-coordinate geometry to one Hf(1) and two equivalent Hg(1) atoms.