The material structure described by CsY10(C2I9)2 crystallizes in the triclinic P-1 space group. Cs(1) is bonded to two equivalent I(2), two equivalent I(3), two equivalent I(5), two equivalent I(7), two equivalent I(8), and two equivalent I(9) atoms to form CsI12 cuboctahedra that share corners with two equivalent Y(4)CI5 octahedra, corners with four equivalent Y(2)CI5 octahedra, and faces with two equivalent Y(4)CI5 octahedra. The corner-sharing octahedral tilt angles range from 42-45°. There are five inequivalent Y sites. In the first Y site, Y(1) is bonded in a 7-coordinate geometry to one C(1), one C(2), one I(1), one I(2), one I(3), and two equivalent I(9) atoms. In the second Y site, Y(2) is bonded to one C(1), one I(5), one I(6), one I(8), and two equivalent I(1) atoms to form distorted YCI5 octahedra that share corners with two equivalent Cs(1)I12 cuboctahedra,  an edgeedge with one Y(2)CI5 octahedra, and  an edgeedge with one Y(4)CI5 octahedra. In the third Y site, Y(3) is bonded in a 7-coordinate geometry to one C(1), one C(2), one I(4), one I(8), one I(9), and two equivalent I(7) atoms. In the fourth Y site, Y(4) is bonded to one C(2), one I(5), one I(6), one I(7), and two equivalent I(3) atoms to form distorted YCI5 octahedra that share  a cornercorner with one Cs(1)I12 cuboctahedra,  an edgeedge with one Y(2)CI5 octahedra,  an edgeedge with one Y(4)CI5 octahedra, and  a faceface with one Cs(1)I12 cuboctahedra. In the fifth Y site, Y(5) is bonded in a 8-coordinate geometry to two equivalent C(1), two equivalent C(2), one I(2), one I(4), one I(5), and one I(6) atom. There are two inequivalent C sites. In the first C site, C(1) is bonded in a 6-coordinate geometry to one Y(1), one Y(2), one Y(3), two equivalent Y(5), and one C(2) atom. In the second C site, C(2) is bonded in a 6-coordinate geometry to one Y(1), one Y(3), one Y(4), two equivalent Y(5), and one C(1) atom. There are nine inequivalent I sites. In the first I site, I(1) is bonded in a T-shaped geometry to one Y(1) and two equivalent Y(2) atoms. In the second I site, I(2) is bonded in a 2-coordinate geometry to one Cs(1), one Y(1), and one Y(5) atom. In the third I site, I(3) is bonded in a distorted rectangular see-saw-like geometry to one Cs(1), one Y(1), and two equivalent Y(4) atoms. In the fourth I site, I(4) is bonded in a 2-coordinate geometry to one Y(3) and one Y(5) atom. In the fifth I site, I(5) is bonded in a distorted rectangular see-saw-like geometry to one Cs(1), one Y(2), one Y(4), and one Y(5) atom. In the sixth I site, I(6) is bonded in a distorted T-shaped geometry to one Y(2), one Y(4), and one Y(5) atom. In the seventh I site, I(7) is bonded in a distorted rectangular see-saw-like geometry to one Cs(1), one Y(4), and two equivalent Y(3) atoms. In the eighth I site, I(8) is bonded in a 3-coordinate geometry to one Cs(1), one Y(2), and one Y(3) atom. In the ninth I site, I(9) is bonded in a 4-coordinate geometry to one Cs(1), one Y(3), and two equivalent Y(1) atoms. is represented by the CIF card [CIF]
data_CsY10(C2I9)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.329
_cell_length_b   11.385
_cell_length_c   11.503
_cell_angle_alpha   113.265
_cell_angle_beta   87.188
_cell_angle_gamma   119.330
_symmetry_Int_Tables_number   1
_cell_volume   1168.765
_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
  Cs  Cs0  1  0.500  0.000  0.500  1.0
  Y  Y1  1  0.675  0.724  0.710  1.0
  Y  Y2  1  0.278  0.353  0.015  1.0
  Y  Y3  1  0.093  0.393  0.292  1.0
  Y  Y4  1  0.965  0.038  0.324  1.0
  Y  Y5  1  0.907  0.607  0.708  1.0
  Y  Y6  1  0.106  0.944  0.001  1.0
  Y  Y7  1  0.035  0.962  0.676  1.0
  Y  Y8  1  0.325  0.276  0.290  1.0
  Y  Y9  1  0.722  0.647  0.985  1.0
  Y  Y10  1  0.894  0.056  0.999  1.0
  C  C11  1  0.152  0.220  0.121  1.0
  C  C12  1  0.848  0.780  0.879  1.0
  C  C13  1  0.923  0.855  0.803  1.0
  C  C14  1  0.077  0.145  0.197  1.0
  I  I15  1  0.447  0.529  0.832  1.0
  I  I16  1  0.388  0.039  0.159  1.0
  I  I17  1  0.775  0.856  0.499  1.0
  I  I18  1  0.834  0.312  0.153  1.0
  I  I19  1  0.553  0.471  0.168  1.0
  I  I20  1  0.225  0.144  0.501  1.0
  I  I21  1  0.319  0.095  0.829  1.0
  I  I22  1  0.681  0.905  0.171  1.0
  I  I23  1  0.977  0.755  0.171  1.0
  I  I24  1  0.933  0.299  0.503  1.0
  I  I25  1  0.023  0.245  0.829  1.0
  I  I26  1  0.067  0.701  0.497  1.0
  I  I27  1  0.262  0.625  0.183  1.0
  I  I28  1  0.738  0.375  0.817  1.0
  I  I29  1  0.642  0.432  0.499  1.0
  I  I30  1  0.166  0.688  0.847  1.0
  I  I31  1  0.612  0.961  0.841  1.0
  I  I32  1  0.358  0.568  0.501  1.0
[/CIF]
.
The material structure described by CsY10(C2I9)2 crystallizes in the triclinic P-1 space group. Cs(1) is bonded to two equivalent I(2), two equivalent I(3), two equivalent I(5), two equivalent I(7), two equivalent I(8), and two equivalent I(9) atoms to form CsI12 cuboctahedra that share corners with two equivalent Y(4)CI5 octahedra, corners with four equivalent Y(2)CI5 octahedra, and faces with two equivalent Y(4)CI5 octahedra. The corner-sharing octahedral tilt angles range from 42-45°. There are five inequivalent Y sites. In the first Y site, Y(1) is bonded in a 7-coordinate geometry to one C(1), one C(2), one I(1), one I(2), one I(3), and two equivalent I(9) atoms. In the second Y site, Y(2) is bonded to one C(1), one I(5), one I(6), one I(8), and two equivalent I(1) atoms to form distorted YCI5 octahedra that share corners with two equivalent Cs(1)I12 cuboctahedra,  an edgeedge with one Y(2)CI5 octahedra, and  an edgeedge with one Y(4)CI5 octahedra. In the third Y site, Y(3) is bonded in a 7-coordinate geometry to one C(1), one C(2), one I(4), one I(8), one I(9), and two equivalent I(7) atoms. In the fourth Y site, Y(4) is bonded to one C(2), one I(5), one I(6), one I(7), and two equivalent I(3) atoms to form distorted YCI5 octahedra that share  a cornercorner with one Cs(1)I12 cuboctahedra,  an edgeedge with one Y(2)CI5 octahedra,  an edgeedge with one Y(4)CI5 octahedra, and  a faceface with one Cs(1)I12 cuboctahedra. In the fifth Y site, Y(5) is bonded in a 8-coordinate geometry to two equivalent C(1), two equivalent C(2), one I(2), one I(4), one I(5), and one I(6) atom. There are two inequivalent C sites. In the first C site, C(1) is bonded in a 6-coordinate geometry to one Y(1), one Y(2), one Y(3), two equivalent Y(5), and one C(2) atom. In the second C site, C(2) is bonded in a 6-coordinate geometry to one Y(1), one Y(3), one Y(4), two equivalent Y(5), and one C(1) atom. There are nine inequivalent I sites. In the first I site, I(1) is bonded in a T-shaped geometry to one Y(1) and two equivalent Y(2) atoms. In the second I site, I(2) is bonded in a 2-coordinate geometry to one Cs(1), one Y(1), and one Y(5) atom. In the third I site, I(3) is bonded in a distorted rectangular see-saw-like geometry to one Cs(1), one Y(1), and two equivalent Y(4) atoms. In the fourth I site, I(4) is bonded in a 2-coordinate geometry to one Y(3) and one Y(5) atom. In the fifth I site, I(5) is bonded in a distorted rectangular see-saw-like geometry to one Cs(1), one Y(2), one Y(4), and one Y(5) atom. In the sixth I site, I(6) is bonded in a distorted T-shaped geometry to one Y(2), one Y(4), and one Y(5) atom. In the seventh I site, I(7) is bonded in a distorted rectangular see-saw-like geometry to one Cs(1), one Y(4), and two equivalent Y(3) atoms. In the eighth I site, I(8) is bonded in a 3-coordinate geometry to one Cs(1), one Y(2), and one Y(3) atom. In the ninth I site, I(9) is bonded in a 4-coordinate geometry to one Cs(1), one Y(3), and two equivalent Y(1) atoms. is represented by the CIF card [CIF]
data_CsY10(C2I9)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.329
_cell_length_b   11.385
_cell_length_c   11.503
_cell_angle_alpha   113.265
_cell_angle_beta   87.188
_cell_angle_gamma   119.330
_symmetry_Int_Tables_number   1
_cell_volume   1168.765
_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
  Cs  Cs0  1  0.500  0.000  0.500  1.0
  Y  Y1  1  0.675  0.724  0.710  1.0
  Y  Y2  1  0.278  0.353  0.015  1.0
  Y  Y3  1  0.093  0.393  0.292  1.0
  Y  Y4  1  0.965  0.038  0.324  1.0
  Y  Y5  1  0.907  0.607  0.708  1.0
  Y  Y6  1  0.106  0.944  0.001  1.0
  Y  Y7  1  0.035  0.962  0.676  1.0
  Y  Y8  1  0.325  0.276  0.290  1.0
  Y  Y9  1  0.722  0.647  0.985  1.0
  Y  Y10  1  0.894  0.056  0.999  1.0
  C  C11  1  0.152  0.220  0.121  1.0
  C  C12  1  0.848  0.780  0.879  1.0
  C  C13  1  0.923  0.855  0.803  1.0
  C  C14  1  0.077  0.145  0.197  1.0
  I  I15  1  0.447  0.529  0.832  1.0
  I  I16  1  0.388  0.039  0.159  1.0
  I  I17  1  0.775  0.856  0.499  1.0
  I  I18  1  0.834  0.312  0.153  1.0
  I  I19  1  0.553  0.471  0.168  1.0
  I  I20  1  0.225  0.144  0.501  1.0
  I  I21  1  0.319  0.095  0.829  1.0
  I  I22  1  0.681  0.905  0.171  1.0
  I  I23  1  0.977  0.755  0.171  1.0
  I  I24  1  0.933  0.299  0.503  1.0
  I  I25  1  0.023  0.245  0.829  1.0
  I  I26  1  0.067  0.701  0.497  1.0
  I  I27  1  0.262  0.625  0.183  1.0
  I  I28  1  0.738  0.375  0.817  1.0
  I  I29  1  0.642  0.432  0.499  1.0
  I  I30  1  0.166  0.688  0.847  1.0
  I  I31  1  0.612  0.961  0.841  1.0
  I  I32  1  0.358  0.568  0.501  1.0
[/CIF]
.