data_Na2LiHg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.91
_cell_length_b   7.91
_cell_length_c   7.91
_cell_angle_alpha   148.16
_cell_angle_beta   148.16
_cell_angle_gamma   45.65
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2LiHg2
_chemical_formula_sum   'Na2 Li1 Hg2'
_cell_volume   137.12
_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
  Na  Na3  1  0.0  0.17  0.64  1.0
  Na  Na4  1  0.17  0.0  0.64  1.0
  Li  Li2  1  0.0  0.0  0.0  1.0
  Hg  Hg0  1  0.0  0.0  0.7  1.0
  Hg  Hg1  1  0.0  0.0  0.87  1.0

data_Na2LiHg2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.13
_cell_length_b   6.13
_cell_length_c   7.91
_cell_angle_alpha   90.0
_cell_angle_beta   112.82
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Na2LiHg2
_chemical_formula_sum   'Na4 Li2 Hg4'
_cell_volume   274.25
_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
  Na  Na0  4  0.06  0.42  0.48  1.0
  Li  Li1  2  0.0  0.0  0.0  1.0
  Hg  Hg2  2  0.2  0.5  0.7  1.0
  Hg  Hg3  2  0.37  0.5  0.87  1.0

Na Na Li Hg Hg
Na2LiHg2 is Indium-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Na2LiHg2 clusters. Na(1) is bonded in a 2-coordinate geometry to one Na(1) and one Hg(1) atom. The Na(1)-Na(1) bond length is 1.04 Å. The Na(1)-Hg(1) bond length is 1.75 Å. Li(1) is bonded in a single-bond geometry to one Hg(2) atom. The Li(1)-Hg(2) bond length is 1.00 Å. There are two inequivalent Hg sites. In the first Hg site, Hg(1) is bonded in a 3-coordinate geometry to two equivalent Na(1) and one Hg(2) atom. The Hg(1)-Hg(2) bond length is 1.34 Å. In the second Hg site, Hg(2) is bonded in a distorted single-bond geometry to one Li(1) and one Hg(1) atom.