The material structure described by Hg3Si crystallizes in the hexagonal P6_3/mmc space group. Hg(1) is bonded in a 6-coordinate geometry to four equivalent Hg(1) and two equivalent Si(1) atoms. Si(1) is bonded to six equivalent Hg(1) atoms to form distorted face-sharing SiHg6 pentagonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_SiHg3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.645
_cell_length_b   7.645
_cell_length_c   3.949
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   199.896
_cell_formula_units_Z   2
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
  Si  Si0  1  0.333  0.667  0.750  1.0
  Si  Si1  1  0.667  0.333  0.250  1.0
  Hg  Hg2  1  0.180  0.360  0.250  1.0
  Hg  Hg3  1  0.640  0.820  0.250  1.0
  Hg  Hg4  1  0.180  0.820  0.250  1.0
  Hg  Hg5  1  0.820  0.640  0.750  1.0
  Hg  Hg6  1  0.360  0.180  0.750  1.0
  Hg  Hg7  1  0.820  0.180  0.750  1.0
[/CIF]
.
The material structure described by Hg3Si crystallizes in the hexagonal P6_3/mmc space group. Hg(1) is bonded in a 6-coordinate geometry to four equivalent Hg(1) and two equivalent Si(1) atoms. Si(1) is bonded to six equivalent Hg(1) atoms to form distorted face-sharing SiHg6 pentagonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_SiHg3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.645
_cell_length_b   7.645
_cell_length_c   3.949
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   199.896
_cell_formula_units_Z   2
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
  Si  Si0  1  0.333  0.667  0.750  1.0
  Si  Si1  1  0.667  0.333  0.250  1.0
  Hg  Hg2  1  0.180  0.360  0.250  1.0
  Hg  Hg3  1  0.640  0.820  0.250  1.0
  Hg  Hg4  1  0.180  0.820  0.250  1.0
  Hg  Hg5  1  0.820  0.640  0.750  1.0
  Hg  Hg6  1  0.360  0.180  0.750  1.0
  Hg  Hg7  1  0.820  0.180  0.750  1.0
[/CIF]
.