data_AlZn2Hg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.63
_cell_length_b   4.63
_cell_length_c   3.45
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   AlZn2Hg
_chemical_formula_sum   'Al1 Zn2 Hg1'
_cell_volume   74.14
_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
  Al  Al0  1  0.0  0.0  0.0  1.0
  Zn  Zn2  1  0.32  0.0  0.73  1.0
  Zn  Zn3  1  0.0  0.32  0.73  1.0
  Hg  Hg1  1  0.32  0.32  0.0  1.0

data_AlZn2Hg
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.55
_cell_length_b   6.55
_cell_length_c   3.45
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   AlZn2Hg
_chemical_formula_sum   'Al2 Zn4 Hg2'
_cell_volume   148.27
_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
  Al  Al0  2  0.0  0.0  0.0  1.0
  Zn  Zn1  4  0.16  0.16  0.73  1.0
  Hg  Hg2  2  0.32  0.0  0.0  1.0

Al Zn Zn Hg
HgZn2Al is Indium-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two HgZn2Al clusters. Hg(1) is bonded in a 2-coordinate geometry to two equivalent Zn(1) and one Al(1) atom. Both Hg(1)-Zn(1) bond lengths are 1.74 Å. The Hg(1)-Al(1) bond length is 2.07 Å. Zn(1) is bonded in a 2-coordinate geometry to one Hg(1) and one Al(1) atom. The Zn(1)-Al(1) bond length is 1.74 Å. Al(1) is bonded in a 3-coordinate geometry to one Hg(1) and two equivalent Zn(1) atoms.