data_LiAl2Hg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.06
_cell_length_b   4.06
_cell_length_c   4.26
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   LiAl2Hg
_chemical_formula_sum   'Li1 Al2 Hg1'
_cell_volume   70.46
_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
  Li  Li3  1  0.0  0.0  0.0  1.0
  Al  Al0  1  0.0  0.03  0.13  1.0
  Al  Al1  1  0.03  0.0  0.13  1.0
  Hg  Hg2  1  0.03  0.03  0.0  1.0

data_LiAl2Hg
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.75
_cell_length_b   5.75
_cell_length_c   4.26
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   LiAl2Hg
_chemical_formula_sum   'Li2 Al4 Hg2'
_cell_volume   140.91
_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
  Li  Li0  2  0.0  0.0  0.0  1.0
  Al  Al1  4  0.02  0.02  0.13  1.0
  Hg  Hg2  2  0.03  0.0  0.0  1.0

Li Al Al Hg
LiHgAl2 is alpha Po structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two LiHgAl2 clusters. Li(1) is bonded in a single-bond geometry to one Hg(1) and two equivalent Al(1) atoms. The Li(1)-Hg(1) bond length is 0.19 Å. Both Li(1)-Al(1) bond lengths are 0.58 Å. Hg(1) is bonded in a single-bond geometry to one Li(1) and two equivalent Al(1) atoms. Both Hg(1)-Al(1) bond lengths are 0.58 Å. Al(1) is bonded in a distorted T-shaped geometry to one Li(1), one Hg(1), and one Al(1) atom. The Al(1)-Al(1) bond length is 0.19 Å.