data_SnHgBi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.38
_cell_length_b   3.38
_cell_length_c   10.83
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   107.77
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SnHgBi2
_chemical_formula_sum   'Sn1 Hg1 Bi2'
_cell_volume   117.58
_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
  Sn  Sn3  1  0.0  0.0  0.0  1.0
  Hg  Hg2  1  0.0  0.0  0.41  1.0
  Bi  Bi0  1  0.99  0.0  0.69  1.0
  Bi  Bi1  1  0.99  0.0  0.14  1.0

data_SnHgBi2
_symmetry_space_group_name_H-M   Cmm2
_cell_length_a   3.98
_cell_length_b   5.46
_cell_length_c   10.83
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   35
_chemical_formula_structural   SnHgBi2
_chemical_formula_sum   'Sn2 Hg2 Bi4'
_cell_volume   235.17
_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, y, z'
  4  'x, -y, z'
  5  'x+1/2, y+1/2, z'
  6  '-x+1/2, -y+1/2, z'
  7  '-x+1/2, y+1/2, z'
  8  '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
  Sn  Sn0  2  0.0  0.0  0.0  1.0
  Hg  Hg1  2  0.0  0.0  0.59  1.0
  Bi  Bi2  2  0.0  0.0  0.31  1.0
  Bi  Bi3  2  0.0  0.0  0.86  1.0

Sn Hg Bi Bi
HgSnBi2 crystallizes in the triclinic P1 space group. Hg(1) is bonded in a linear geometry to one Bi(1) and one Bi(2) atom. The Hg(1)-Bi(1) bond length is 2.94 Å. The Hg(1)-Bi(2) bond length is 2.94 Å. Sn(1) is bonded in a single-bond geometry to one Bi(1) and one Bi(2) atom. The Sn(1)-Bi(1) bond length is 3.40 Å. The Sn(1)-Bi(2) bond length is 1.54 Å. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to one Hg(1), one Sn(1), and four equivalent Bi(1) atoms to form a mixture of distorted edge and corner-sharing BiSnHgBi4 octahedra. The corner-sharing octahedra are not tilted. All Bi(1)-Bi(1) bond lengths are 3.38 Å. In the second Bi site, Bi(2) is bonded in a distorted single-bond geometry to one Hg(1) and one Sn(1) atom.