data_Ag3Hg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.18
_cell_length_b   5.18
_cell_length_c   3.0
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   109.6
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ag3Hg
_chemical_formula_sum   'Ag3 Hg1'
_cell_volume   75.78
_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
  Ag  Ag0  1  0.0  0.0  0.0  1.0
  Ag  Ag1  1  0.49  0.88  0.5  1.0
  Ag  Ag2  1  0.49  0.12  0.5  1.0
  Hg  Hg3  1  0.99  0.0  0.0  1.0

data_Ag3Hg
_symmetry_space_group_name_H-M   Pm
_cell_length_a   5.18
_cell_length_b   3.0
_cell_length_c   5.18
_cell_angle_alpha   90.0
_cell_angle_beta   109.6
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   6
_chemical_formula_structural   Ag3Hg
_chemical_formula_sum   'Ag3 Hg1'
_cell_volume   75.78
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '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
  Ag  Ag0  1  0.0  0.0  0.0  1.0
  Ag  Ag1  1  0.49  0.5  0.12  1.0
  Ag  Ag2  1  0.49  0.5  0.88  1.0
  Hg  Hg3  1  0.99  0.0  0.0  1.0

Ag Ag Ag Hg
(Ag)2AgHg is alpha carbon monoxide-like structured and crystallizes in the monoclinic Pm space group. The structure is zero-dimensional and consists of one mercury;silver molecule and one Ag cluster. In the Ag cluster, Ag(2) is bonded in a single-bond geometry to one Ag(2) atom. The Ag(2)-Ag(2) bond length is 1.20 Å.