data_AgSnHg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.13
_cell_length_b   5.13
_cell_length_c   5.13
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   AgSnHg2
_chemical_formula_sum   'Ag1 Sn1 Hg2'
_cell_volume   95.47
_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
  Sn  Sn3  1  0.44  0.44  0.44  1.0
  Hg  Hg1  1  0.63  0.63  0.63  1.0
  Hg  Hg2  1  0.81  0.81  0.81  1.0

data_AgSnHg2
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.13
_cell_length_b   5.13
_cell_length_c   12.57
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   AgSnHg2
_chemical_formula_sum   'Ag3 Sn3 Hg6'
_cell_volume   286.41
_cell_formula_units_Z   3
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-y, x-y, z'
  3  '-x+y, -x, z'
  4  '-y, -x, z'
  5  '-x+y, y, z'
  6  'x, x-y, z'
  7  'x+1/3, y+2/3, z+2/3'
  8  '-y+1/3, x-y+2/3, z+2/3'
  9  '-x+y+1/3, -x+2/3, z+2/3'
  10  '-y+1/3, -x+2/3, z+2/3'
  11  '-x+y+1/3, y+2/3, z+2/3'
  12  'x+1/3, x-y+2/3, z+2/3'
  13  'x+2/3, y+1/3, z+1/3'
  14  '-y+2/3, x-y+1/3, z+1/3'
  15  '-x+y+2/3, -x+1/3, z+1/3'
  16  '-y+2/3, -x+1/3, z+1/3'
  17  '-x+y+2/3, y+1/3, z+1/3'
  18  'x+2/3, x-y+1/3, z+1/3'
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  3  0.0  0.0  0.0  1.0
  Sn  Sn1  3  0.0  0.0  0.56  1.0
  Hg  Hg2  3  0.0  0.0  0.19  1.0
  Hg  Hg3  3  0.0  0.0  0.37  1.0

Ag Sn Hg Hg
AgHg2Sn crystallizes in the trigonal R3m space group. Ag(1) is bonded in a 1-coordinate geometry to one Hg(2), three equivalent Hg(1), and three equivalent Sn(1) atoms. The Ag(1)-Hg(2) bond length is 2.34 Å. All Ag(1)-Hg(1) bond lengths are 3.00 Å. All Ag(1)-Sn(1) bond lengths are 3.26 Å. There are two inequivalent Hg sites. In the first Hg site, Hg(1) is bonded to three equivalent Ag(1), one Hg(2), and one Sn(1) atom to form distorted corner-sharing HgAg3SnHg trigonal bipyramids. The Hg(1)-Hg(2) bond length is 2.34 Å. The Hg(1)-Sn(1) bond length is 2.34 Å. In the second Hg site, Hg(2) is bonded in a 5-coordinate geometry to one Ag(1), one Hg(1), and three equivalent Sn(1) atoms. All Hg(2)-Sn(1) bond lengths are 3.00 Å. Sn(1) is bonded in a 7-coordinate geometry to three equivalent Ag(1), one Hg(1), and three equivalent Hg(2) atoms.