data_Hg2BiPb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.22
_cell_length_b   11.22
_cell_length_c   11.22
_cell_angle_alpha   17.74
_cell_angle_beta   17.74
_cell_angle_gamma   17.74
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Hg2BiPb
_chemical_formula_sum   'Hg2 Bi1 Pb1'
_cell_volume   114.45
_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
  Hg  Hg1  1  0.0  0.0  0.83  1.0
  Hg  Hg2  1  0.0  0.0  0.29  1.0
  Bi  Bi0  1  0.0  0.0  0.56  1.0
  Pb  Pb3  1  0.0  0.0  0.0  1.0

data_Hg2BiPb
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.99
_cell_length_b   3.46
_cell_length_c   11.22
_cell_angle_alpha   90.0
_cell_angle_beta   100.26
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Hg2BiPb
_chemical_formula_sum   'Hg4 Bi2 Pb2'
_cell_volume   228.9
_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
  Hg  Hg0  2  0.0  0.0  0.17  1.0
  Hg  Hg1  2  0.0  0.0  0.71  1.0
  Bi  Bi2  2  0.0  0.0  0.44  1.0
  Pb  Pb3  2  0.0  0.0  0.0  1.0

Hg Hg Bi Pb
Hg Hg Bi Pb 0 3 o o + 0 2 o o o 1 1 o + - 1 1 + - o 1 1 + o - 1 3 o o o 1 2 o o o 2 2 o + - 2 2 + - o 2 2 + o - 
Hg2PbBi crystallizes in the monoclinic Cm space group. There are two inequivalent Hg sites. In the first Hg site, Hg(1) is bonded in a single-bond geometry to one Pb(1) and one Bi(1) atom. The Hg(1)-Pb(1) bond length is 1.95 Å. The Hg(1)-Bi(1) bond length is 3.02 Å. In the second Hg site, Hg(2) is bonded in a linear geometry to one Pb(1) and one Bi(1) atom. The Hg(2)-Pb(1) bond length is 3.24 Å. The Hg(2)-Bi(1) bond length is 3.02 Å. Pb(1) is bonded in a distorted single-bond geometry to one Hg(1) and one Hg(2) atom. Bi(1) is bonded to one Hg(1), one Hg(2), and six equivalent Bi(1) atoms to form a mixture of distorted corner and edge-sharing BiHg2Bi6 hexagonal bipyramids. All Bi(1)-Bi(1) bond lengths are 3.46 Å.