The crystal structure described by SeCl4 is Indium-like structured and crystallizes in the monoclinic C2/c space group. The structure is zero-dimensional and consists of four SeCl4 clusters. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded to one Cl(1), one Cl(2), one Cl(3), one Cl(4), and two equivalent Cl(5) atoms to form distorted edge-sharing SeCl6 octahedra. In the second Se site, Se(2) is bonded to one Cl(5), one Cl(6), one Cl(7), one Cl(8), and two equivalent Cl(4) atoms to form distorted edge-sharing SeCl6 octahedra. There are eight inequivalent Cl sites. In the first Cl site, Cl(5) is bonded in a distorted T-shaped geometry to one Se(2) and two equivalent Se(1) atoms. In the second Cl site, Cl(6) is bonded in a single-bond geometry to one Se(2) atom. In the third Cl site, Cl(7) is bonded in a single-bond geometry to one Se(2) atom. In the fourth Cl site, Cl(8) is bonded in a single-bond geometry to one Se(2) atom. In the fifth Cl site, Cl(1) is bonded in a single-bond geometry to one Se(1) atom. In the sixth Cl site, Cl(2) is bonded in a single-bond geometry to one Se(1) atom. In the seventh Cl site, Cl(3) is bonded in a single-bond geometry to one Se(1) atom. In the eighth Cl site, Cl(4) is bonded in a distorted T-shaped geometry to one Se(1) and two equivalent Se(2) atoms. is represented by the CIF file [CIF]
data_SeCl4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.789
_cell_length_b   9.789
_cell_length_c   14.602
_cell_angle_alpha   94.851
_cell_angle_beta   105.443
_cell_angle_gamma   118.464
_symmetry_Int_Tables_number   1
_cell_volume   1148.070
_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
  Se  Se0  1  0.652  0.112  0.816  1.0
  Se  Se1  1  0.795  0.836  0.684  1.0
  Se  Se2  1  0.348  0.888  0.184  1.0
  Se  Se3  1  0.205  0.164  0.316  1.0
  Se  Se4  1  0.152  0.268  0.888  1.0
  Se  Se5  1  0.880  0.264  0.612  1.0
  Se  Se6  1  0.848  0.732  0.112  1.0
  Se  Se7  1  0.120  0.736  0.388  1.0
  Cl  Cl8  1  0.715  0.215  0.972  1.0
  Cl  Cl9  1  0.744  0.743  0.528  1.0
  Cl  Cl10  1  0.285  0.785  0.028  1.0
  Cl  Cl11  1  0.256  0.257  0.472  1.0
  Cl  Cl12  1  0.510  0.221  0.755  1.0
  Cl  Cl13  1  0.966  0.754  0.745  1.0
  Cl  Cl14  1  0.490  0.779  0.245  1.0
  Cl  Cl15  1  0.034  0.246  0.255  1.0
  Cl  Cl16  1  0.435  0.879  0.807  1.0
  Cl  Cl17  1  0.572  0.628  0.693  1.0
  Cl  Cl18  1  0.565  0.121  0.193  1.0
  Cl  Cl19  1  0.428  0.372  0.307  1.0
  Cl  Cl20  1  0.935  0.374  0.811  1.0
  Cl  Cl21  1  0.063  0.124  0.689  1.0
  Cl  Cl22  1  0.065  0.626  0.189  1.0
  Cl  Cl23  1  0.937  0.876  0.311  1.0
  Cl  Cl24  1  0.860  0.991  0.871  1.0
  Cl  Cl25  1  0.620  0.989  0.629  1.0
  Cl  Cl26  1  0.140  0.009  0.129  1.0
  Cl  Cl27  1  0.380  0.011  0.371  1.0
  Cl  Cl28  1  0.358  0.487  0.875  1.0
  Cl  Cl29  1  0.112  0.483  0.625  1.0
  Cl  Cl30  1  0.642  0.513  0.125  1.0
  Cl  Cl31  1  0.888  0.517  0.375  1.0
  Cl  Cl32  1  0.290  0.148  0.931  1.0
  Cl  Cl33  1  0.717  0.358  0.569  1.0
  Cl  Cl34  1  0.710  0.852  0.069  1.0
  Cl  Cl35  1  0.283  0.642  0.431  1.0
  Cl  Cl36  1  0.176  0.365  0.036  1.0
  Cl  Cl37  1  0.830  0.141  0.464  1.0
  Cl  Cl38  1  0.824  0.635  0.964  1.0
  Cl  Cl39  1  0.170  0.859  0.536  1.0
[/CIF]
.
The crystal structure described by SeCl4 is Indium-like structured and crystallizes in the monoclinic C2/c space group. The structure is zero-dimensional and consists of four SeCl4 clusters. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded to one Cl(1), one Cl(2), one Cl(3), one Cl(4), and two equivalent Cl(5) atoms to form distorted edge-sharing SeCl6 octahedra. In the second Se site, Se(2) is bonded to one Cl(5), one Cl(6), one Cl(7), one Cl(8), and two equivalent Cl(4) atoms to form distorted edge-sharing SeCl6 octahedra. There are eight inequivalent Cl sites. In the first Cl site, Cl(5) is bonded in a distorted T-shaped geometry to one Se(2) and two equivalent Se(1) atoms. In the second Cl site, Cl(6) is bonded in a single-bond geometry to one Se(2) atom. In the third Cl site, Cl(7) is bonded in a single-bond geometry to one Se(2) atom. In the fourth Cl site, Cl(8) is bonded in a single-bond geometry to one Se(2) atom. In the fifth Cl site, Cl(1) is bonded in a single-bond geometry to one Se(1) atom. In the sixth Cl site, Cl(2) is bonded in a single-bond geometry to one Se(1) atom. In the seventh Cl site, Cl(3) is bonded in a single-bond geometry to one Se(1) atom. In the eighth Cl site, Cl(4) is bonded in a distorted T-shaped geometry to one Se(1) and two equivalent Se(2) atoms. is represented by the CIF file [CIF]
data_SeCl4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.789
_cell_length_b   9.789
_cell_length_c   14.602
_cell_angle_alpha   94.851
_cell_angle_beta   105.443
_cell_angle_gamma   118.464
_symmetry_Int_Tables_number   1
_cell_volume   1148.070
_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
  Se  Se0  1  0.652  0.112  0.816  1.0
  Se  Se1  1  0.795  0.836  0.684  1.0
  Se  Se2  1  0.348  0.888  0.184  1.0
  Se  Se3  1  0.205  0.164  0.316  1.0
  Se  Se4  1  0.152  0.268  0.888  1.0
  Se  Se5  1  0.880  0.264  0.612  1.0
  Se  Se6  1  0.848  0.732  0.112  1.0
  Se  Se7  1  0.120  0.736  0.388  1.0
  Cl  Cl8  1  0.715  0.215  0.972  1.0
  Cl  Cl9  1  0.744  0.743  0.528  1.0
  Cl  Cl10  1  0.285  0.785  0.028  1.0
  Cl  Cl11  1  0.256  0.257  0.472  1.0
  Cl  Cl12  1  0.510  0.221  0.755  1.0
  Cl  Cl13  1  0.966  0.754  0.745  1.0
  Cl  Cl14  1  0.490  0.779  0.245  1.0
  Cl  Cl15  1  0.034  0.246  0.255  1.0
  Cl  Cl16  1  0.435  0.879  0.807  1.0
  Cl  Cl17  1  0.572  0.628  0.693  1.0
  Cl  Cl18  1  0.565  0.121  0.193  1.0
  Cl  Cl19  1  0.428  0.372  0.307  1.0
  Cl  Cl20  1  0.935  0.374  0.811  1.0
  Cl  Cl21  1  0.063  0.124  0.689  1.0
  Cl  Cl22  1  0.065  0.626  0.189  1.0
  Cl  Cl23  1  0.937  0.876  0.311  1.0
  Cl  Cl24  1  0.860  0.991  0.871  1.0
  Cl  Cl25  1  0.620  0.989  0.629  1.0
  Cl  Cl26  1  0.140  0.009  0.129  1.0
  Cl  Cl27  1  0.380  0.011  0.371  1.0
  Cl  Cl28  1  0.358  0.487  0.875  1.0
  Cl  Cl29  1  0.112  0.483  0.625  1.0
  Cl  Cl30  1  0.642  0.513  0.125  1.0
  Cl  Cl31  1  0.888  0.517  0.375  1.0
  Cl  Cl32  1  0.290  0.148  0.931  1.0
  Cl  Cl33  1  0.717  0.358  0.569  1.0
  Cl  Cl34  1  0.710  0.852  0.069  1.0
  Cl  Cl35  1  0.283  0.642  0.431  1.0
  Cl  Cl36  1  0.176  0.365  0.036  1.0
  Cl  Cl37  1  0.830  0.141  0.464  1.0
  Cl  Cl38  1  0.824  0.635  0.964  1.0
  Cl  Cl39  1  0.170  0.859  0.536  1.0
[/CIF]
.