The structure described by Hg4I7 crystallizes in the tetragonal P-4m2 space group. Hg(1) is bonded to one I(2), one I(3), and two equivalent I(1) atoms to form corner-sharing HgI4 tetrahedra. There are three inequivalent I sites. In the first I site, I(3) is bonded in a tetrahedral geometry to four equivalent Hg(1) atoms. In the second I site, I(1) is bonded in a water-like geometry to two equivalent Hg(1) atoms. In the third I site, I(2) is bonded in a water-like geometry to two equivalent Hg(1) atoms. is represented by the CIF card [CIF]
data_Hg4I7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.513
_cell_length_b   9.513
_cell_length_c   6.584
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   595.766
_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  Hg0  1  0.000  0.272  0.230  1.0
  Hg  Hg1  1  0.728  0.000  0.770  1.0
  Hg  Hg2  1  0.272  0.000  0.770  1.0
  Hg  Hg3  1  0.000  0.728  0.230  1.0
  I  I4  1  0.256  0.256  0.000  1.0
  I  I5  1  0.744  0.744  0.000  1.0
  I  I6  1  0.500  0.000  0.481  1.0
  I  I7  1  0.000  0.500  0.519  1.0
  I  I8  1  0.000  0.000  0.500  1.0
  I  I9  1  0.744  0.256  0.000  1.0
  I  I10  1  0.256  0.744  0.000  1.0
[/CIF]
.
The structure described by Hg4I7 crystallizes in the tetragonal P-4m2 space group. Hg(1) is bonded to one I(2), one I(3), and two equivalent I(1) atoms to form corner-sharing HgI4 tetrahedra. There are three inequivalent I sites. In the first I site, I(3) is bonded in a tetrahedral geometry to four equivalent Hg(1) atoms. In the second I site, I(1) is bonded in a water-like geometry to two equivalent Hg(1) atoms. In the third I site, I(2) is bonded in a water-like geometry to two equivalent Hg(1) atoms. is represented by the CIF card [CIF]
data_Hg4I7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.513
_cell_length_b   9.513
_cell_length_c   6.584
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   595.766
_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  Hg0  1  0.000  0.272  0.230  1.0
  Hg  Hg1  1  0.728  0.000  0.770  1.0
  Hg  Hg2  1  0.272  0.000  0.770  1.0
  Hg  Hg3  1  0.000  0.728  0.230  1.0
  I  I4  1  0.256  0.256  0.000  1.0
  I  I5  1  0.744  0.744  0.000  1.0
  I  I6  1  0.500  0.000  0.481  1.0
  I  I7  1  0.000  0.500  0.519  1.0
  I  I8  1  0.000  0.000  0.500  1.0
  I  I9  1  0.744  0.256  0.000  1.0
  I  I10  1  0.256  0.744  0.000  1.0
[/CIF]
.