data_FeSiHg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.94
_cell_length_b   2.94
_cell_length_c   6.32
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   FeSiHg
_chemical_formula_sum   'Fe1 Si1 Hg1'
_cell_volume   47.47
_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
  Fe  Fe0  1  1.0  0.7  0.08  1.0
  Si  Si2  1  0.0  0.0  0.56  1.0
  Hg  Hg1  1  0.47  0.85  0.01  1.0

data_FeSiHg
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.94
_cell_length_b   2.94
_cell_length_c   6.32
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   FeSiHg
_chemical_formula_sum   'Fe1 Si1 Hg1'
_cell_volume   47.47
_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
  Fe  Fe0  1  1.0  0.7  0.08  1.0
  Si  Si1  1  0.0  0.0  0.56  1.0
  Hg  Hg2  1  0.47  0.85  0.01  1.0

Fe Si Hg
Fe Si Hg 0 2 + o o 0 1 + + o 0 1 + + - 1 2 - - + 1 2 o - + 1 2 o o + 1 1 + + o 1 1 o + o 1 1 + o o 
FeHgSi crystallizes in the triclinic P1 space group. Fe(1) is bonded in a 3-coordinate geometry to three equivalent Hg(1) and one Si(1) atom. There are a spread of Fe(1)-Hg(1) bond distances ranging from 1.31-2.24 Å. The Fe(1)-Si(1) bond length is 3.18 Å. Hg(1) is bonded in a 3-coordinate geometry to three equivalent Fe(1) and one Si(1) atom. The Hg(1)-Si(1) bond length is 3.13 Å. Si(1) is bonded in a 8-coordinate geometry to one Fe(1), one Hg(1), and six equivalent Si(1) atoms. All Si(1)-Si(1) bond lengths are 2.94 Å.