The crystal structure described by Cd2P3I crystallizes in the monoclinic C2/c space group. Cd(1) is bonded to one P(1), two equivalent P(2), and two equivalent I(1) atoms to form distorted CdP3I2 trigonal bipyramids that share corners with two equivalent P(1)Cd2P2 tetrahedra, corners with four equivalent P(2)Cd2P2 tetrahedra, corners with seven equivalent Cd(1)P3I2 trigonal bipyramids, and  an edgeedge with one Cd(1)P3I2 trigonal bipyramid. There are two inequivalent P sites. In the first P site, P(1) is bonded to two equivalent Cd(1) and two equivalent P(2) atoms to form distorted PCd2P2 tetrahedra that share corners with six equivalent P(2)Cd2P2 tetrahedra and corners with four equivalent Cd(1)P3I2 trigonal bipyramids. In the second P site, P(2) is bonded to two equivalent Cd(1), one P(1), and one P(2) atom to form distorted PCd2P2 tetrahedra that share corners with three equivalent P(1)Cd2P2 tetrahedra, corners with three equivalent P(2)Cd2P2 tetrahedra, and corners with four equivalent Cd(1)P3I2 trigonal bipyramids. I(1) is bonded in a rectangular see-saw-like geometry to four equivalent Cd(1) atoms. is represented by the CIF file [CIF]
data_Cd2P3I
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.308
_cell_length_b   6.308
_cell_length_c   7.642
_cell_angle_alpha   96.288
_cell_angle_beta   96.288
_cell_angle_gamma   96.655
_symmetry_Int_Tables_number   1
_cell_volume   297.948
_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
  Cd  Cd0  1  0.107  0.395  0.281  1.0
  Cd  Cd1  1  0.605  0.893  0.219  1.0
  Cd  Cd2  1  0.893  0.605  0.719  1.0
  Cd  Cd3  1  0.395  0.107  0.781  1.0
  P  P4  1  0.806  0.194  0.750  1.0
  P  P5  1  0.846  0.935  0.542  1.0
  P  P6  1  0.935  0.846  0.042  1.0
  P  P7  1  0.194  0.806  0.250  1.0
  P  P8  1  0.065  0.154  0.958  1.0
  P  P9  1  0.154  0.065  0.458  1.0
  I  I10  1  0.380  0.620  0.750  1.0
  I  I11  1  0.620  0.380  0.250  1.0
[/CIF]
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The crystal structure described by Cd2P3I crystallizes in the monoclinic C2/c space group. Cd(1) is bonded to one P(1), two equivalent P(2), and two equivalent I(1) atoms to form distorted CdP3I2 trigonal bipyramids that share corners with two equivalent P(1)Cd2P2 tetrahedra, corners with four equivalent P(2)Cd2P2 tetrahedra, corners with seven equivalent Cd(1)P3I2 trigonal bipyramids, and  an edgeedge with one Cd(1)P3I2 trigonal bipyramid. There are two inequivalent P sites. In the first P site, P(1) is bonded to two equivalent Cd(1) and two equivalent P(2) atoms to form distorted PCd2P2 tetrahedra that share corners with six equivalent P(2)Cd2P2 tetrahedra and corners with four equivalent Cd(1)P3I2 trigonal bipyramids. In the second P site, P(2) is bonded to two equivalent Cd(1), one P(1), and one P(2) atom to form distorted PCd2P2 tetrahedra that share corners with three equivalent P(1)Cd2P2 tetrahedra, corners with three equivalent P(2)Cd2P2 tetrahedra, and corners with four equivalent Cd(1)P3I2 trigonal bipyramids. I(1) is bonded in a rectangular see-saw-like geometry to four equivalent Cd(1) atoms. is represented by the CIF file [CIF]
data_Cd2P3I
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.308
_cell_length_b   6.308
_cell_length_c   7.642
_cell_angle_alpha   96.288
_cell_angle_beta   96.288
_cell_angle_gamma   96.655
_symmetry_Int_Tables_number   1
_cell_volume   297.948
_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
  Cd  Cd0  1  0.107  0.395  0.281  1.0
  Cd  Cd1  1  0.605  0.893  0.219  1.0
  Cd  Cd2  1  0.893  0.605  0.719  1.0
  Cd  Cd3  1  0.395  0.107  0.781  1.0
  P  P4  1  0.806  0.194  0.750  1.0
  P  P5  1  0.846  0.935  0.542  1.0
  P  P6  1  0.935  0.846  0.042  1.0
  P  P7  1  0.194  0.806  0.250  1.0
  P  P8  1  0.065  0.154  0.958  1.0
  P  P9  1  0.154  0.065  0.458  1.0
  I  I10  1  0.380  0.620  0.750  1.0
  I  I11  1  0.620  0.380  0.250  1.0
[/CIF]
.