data_In3Hg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.34
_cell_length_b   5.34
_cell_length_c   3.77
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   In3Hg
_chemical_formula_sum   'In3 Hg1'
_cell_volume   107.5
_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
  In  In1  1  0.0  0.67  0.88  1.0
  In  In2  1  0.0  0.0  0.0  1.0
  In  In3  1  0.67  0.0  0.88  1.0
  Hg  Hg0  1  0.67  0.67  0.0  1.0

data_In3Hg
_symmetry_space_group_name_H-M   Cm
_cell_length_a   7.56
_cell_length_b   7.56
_cell_length_c   3.77
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   In3Hg
_chemical_formula_sum   'In6 Hg2'
_cell_volume   215.01
_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
  In  In0  4  0.34  0.34  0.88  1.0
  In  In1  2  0.0  0.0  0.0  1.0
  Hg  Hg2  2  0.17  0.5  0.0  1.0

In In In Hg
HgIn3 is Indium-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two HgIn3 clusters. Hg(1) is bonded in an L-shaped geometry to two equivalent In(1) atoms. Both Hg(1)-In(1) bond lengths are 1.81 Å. There are two inequivalent In sites. In the first In site, In(1) is bonded in a distorted L-shaped geometry to one Hg(1) and one In(2) atom. The In(1)-In(2) bond length is 1.81 Å. In the second In site, In(2) is bonded in an L-shaped geometry to two equivalent In(1) atoms.