The crystal structure described by CI2 is Indium-like structured and crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four tetraiodoethylene molecules. C(1) is bonded in a trigonal planar geometry to one C(1), one I(3), and one I(4) atom. There are two inequivalent I sites. In the first I site, I(3) is bonded in a single-bond geometry to one C(1) atom. In the second I site, I(4) is bonded in a single-bond geometry to one C(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_CI2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.042
_cell_length_b   15.629
_cell_length_c   13.364
_cell_angle_alpha   109.011
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   995.701
_cell_formula_units_Z   8
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
  C  C0  1  0.976  0.544  0.506  1.0
  C  C1  1  0.024  0.456  0.494  1.0
  C  C2  1  0.476  0.456  0.994  1.0
  C  C3  1  0.524  0.544  0.006  1.0
  C  C4  1  0.984  0.956  0.972  1.0
  C  C5  1  0.016  0.044  0.028  1.0
  C  C6  1  0.484  0.044  0.528  1.0
  C  C7  1  0.516  0.956  0.472  1.0
  I  I8  1  0.788  0.911  0.825  1.0
  I  I9  1  0.212  0.089  0.175  1.0
  I  I10  1  0.288  0.089  0.675  1.0
  I  I11  1  0.712  0.911  0.325  1.0
  I  I12  1  0.378  0.851  0.524  1.0
  I  I13  1  0.622  0.149  0.476  1.0
  I  I14  1  0.878  0.149  0.976  1.0
  I  I15  1  0.122  0.851  0.024  1.0
  I  I16  1  0.715  0.586  0.891  1.0
  I  I17  1  0.285  0.414  0.109  1.0
  I  I18  1  0.215  0.414  0.609  1.0
  I  I19  1  0.785  0.586  0.391  1.0
  I  I20  1  0.589  0.349  0.859  1.0
  I  I21  1  0.411  0.651  0.141  1.0
  I  I22  1  0.089  0.651  0.641  1.0
  I  I23  1  0.911  0.349  0.359  1.0
[/CIF]
.
The crystal structure described by CI2 is Indium-like structured and crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four tetraiodoethylene molecules. C(1) is bonded in a trigonal planar geometry to one C(1), one I(3), and one I(4) atom. There are two inequivalent I sites. In the first I site, I(3) is bonded in a single-bond geometry to one C(1) atom. In the second I site, I(4) is bonded in a single-bond geometry to one C(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_CI2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.042
_cell_length_b   15.629
_cell_length_c   13.364
_cell_angle_alpha   109.011
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   995.701
_cell_formula_units_Z   8
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
  C  C0  1  0.976  0.544  0.506  1.0
  C  C1  1  0.024  0.456  0.494  1.0
  C  C2  1  0.476  0.456  0.994  1.0
  C  C3  1  0.524  0.544  0.006  1.0
  C  C4  1  0.984  0.956  0.972  1.0
  C  C5  1  0.016  0.044  0.028  1.0
  C  C6  1  0.484  0.044  0.528  1.0
  C  C7  1  0.516  0.956  0.472  1.0
  I  I8  1  0.788  0.911  0.825  1.0
  I  I9  1  0.212  0.089  0.175  1.0
  I  I10  1  0.288  0.089  0.675  1.0
  I  I11  1  0.712  0.911  0.325  1.0
  I  I12  1  0.378  0.851  0.524  1.0
  I  I13  1  0.622  0.149  0.476  1.0
  I  I14  1  0.878  0.149  0.976  1.0
  I  I15  1  0.122  0.851  0.024  1.0
  I  I16  1  0.715  0.586  0.891  1.0
  I  I17  1  0.285  0.414  0.109  1.0
  I  I18  1  0.215  0.414  0.609  1.0
  I  I19  1  0.785  0.586  0.391  1.0
  I  I20  1  0.589  0.349  0.859  1.0
  I  I21  1  0.411  0.651  0.141  1.0
  I  I22  1  0.089  0.651  0.641  1.0
  I  I23  1  0.911  0.349  0.359  1.0
[/CIF]
.