The structure described by Yb8Cl17 is Baddeleyite-like structured and crystallizes in the monoclinic C2/c space group. There are four inequivalent Yb sites. In the first Yb site, Yb(1) is bonded to two equivalent Cl(5), two equivalent Cl(8), and three equivalent Cl(6) atoms to form a mixture of distorted corner and edge-sharing YbCl7 pentagonal bipyramids. In the second Yb site, Yb(2) is bonded in a 8-coordinate geometry to one Cl(1), two equivalent Cl(4), two equivalent Cl(9), and three equivalent Cl(2) atoms. In the third Yb site, Yb(3) is bonded to one Cl(7), two equivalent Cl(1), two equivalent Cl(3), and two equivalent Cl(4) atoms to form a mixture of distorted corner and edge-sharing YbCl7 pentagonal bipyramids. In the fourth Yb site, Yb(4) is bonded to one Cl(8), two equivalent Cl(3), two equivalent Cl(5), and two equivalent Cl(7) atoms to form a mixture of distorted corner and edge-sharing YbCl7 pentagonal bipyramids. There are nine inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a distorted trigonal planar geometry to one Yb(2) and two equivalent Yb(3) atoms. In the second Cl site, Cl(2) is bonded in a 3-coordinate geometry to three equivalent Yb(2) atoms. In the third Cl site, Cl(3) is bonded to two equivalent Yb(3) and two equivalent Yb(4) atoms to form a mixture of corner and edge-sharing ClYb4 tetrahedra. In the fourth Cl site, Cl(4) is bonded to two equivalent Yb(2) and two equivalent Yb(3) atoms to form a mixture of corner and edge-sharing ClYb4 tetrahedra. In the fifth Cl site, Cl(5) is bonded to two equivalent Yb(1) and two equivalent Yb(4) atoms to form a mixture of corner and edge-sharing ClYb4 tetrahedra. In the sixth Cl site, Cl(6) is bonded in a trigonal non-coplanar geometry to three equivalent Yb(1) atoms. In the seventh Cl site, Cl(7) is bonded in a trigonal planar geometry to one Yb(3) and two equivalent Yb(4) atoms. In the eighth Cl site, Cl(8) is bonded in a trigonal planar geometry to one Yb(4) and two equivalent Yb(1) atoms. In the ninth Cl site, Cl(9) is bonded to four equivalent Yb(2) atoms to form a mixture of corner and edge-sharing ClYb4 tetrahedra. is represented by the CIF card [CIF]
data_Yb8Cl17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   27.412
_cell_length_b   27.412
_cell_length_c   6.880
_cell_angle_alpha   83.827
_cell_angle_beta   83.827
_cell_angle_gamma   13.760
_symmetry_Int_Tables_number   1
_cell_volume   1222.504
_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
  Yb  Yb0  1  0.991  0.440  0.363  1.0
  Yb  Yb1  1  0.253  0.808  0.429  1.0
  Yb  Yb2  1  0.685  0.132  0.039  1.0
  Yb  Yb3  1  0.623  0.070  0.687  1.0
  Yb  Yb4  1  0.747  0.192  0.571  1.0
  Yb  Yb5  1  0.808  0.253  0.929  1.0
  Yb  Yb6  1  0.560  0.009  0.137  1.0
  Yb  Yb7  1  0.009  0.560  0.637  1.0
  Yb  Yb8  1  0.930  0.377  0.813  1.0
  Yb  Yb9  1  0.315  0.868  0.961  1.0
  Yb  Yb10  1  0.377  0.930  0.313  1.0
  Yb  Yb11  1  0.192  0.747  0.071  1.0
  Yb  Yb12  1  0.070  0.623  0.187  1.0
  Yb  Yb13  1  0.440  0.991  0.863  1.0
  Yb  Yb14  1  0.868  0.315  0.461  1.0
  Yb  Yb15  1  0.132  0.685  0.539  1.0
  Cl  Cl16  1  0.673  0.486  0.818  1.0
  Cl  Cl17  1  0.579  0.369  0.923  1.0
  Cl  Cl18  1  0.934  0.823  0.860  1.0
  Cl  Cl19  1  0.996  0.882  0.804  1.0
  Cl  Cl20  1  0.882  0.996  0.304  1.0
  Cl  Cl21  1  0.766  0.867  0.427  1.0
  Cl  Cl22  1  0.226  0.264  0.611  1.0
  Cl  Cl23  1  0.867  0.766  0.927  1.0
  Cl  Cl24  1  0.421  0.631  0.077  1.0
  Cl  Cl25  1  0.719  0.556  0.491  1.0
  Cl  Cl26  1  0.243  0.365  0.307  1.0
  Cl  Cl27  1  0.327  0.514  0.182  1.0
  Cl  Cl28  1  0.757  0.635  0.693  1.0
  Cl  Cl29  1  0.004  0.118  0.196  1.0
  Cl  Cl30  1  0.264  0.226  0.111  1.0
  Cl  Cl31  1  0.631  0.421  0.577  1.0
  Cl  Cl32  1  0.118  0.004  0.696  1.0
  Cl  Cl33  1  0.556  0.719  0.991  1.0
  Cl  Cl34  1  0.365  0.243  0.807  1.0
  Cl  Cl35  1  0.058  0.942  0.750  1.0
  Cl  Cl36  1  0.635  0.757  0.193  1.0
  Cl  Cl37  1  0.486  0.673  0.318  1.0
  Cl  Cl38  1  0.444  0.281  0.009  1.0
  Cl  Cl39  1  0.133  0.234  0.073  1.0
  Cl  Cl40  1  0.514  0.327  0.682  1.0
  Cl  Cl41  1  0.774  0.736  0.389  1.0
  Cl  Cl42  1  0.369  0.579  0.423  1.0
  Cl  Cl43  1  0.736  0.774  0.889  1.0
  Cl  Cl44  1  0.823  0.934  0.360  1.0
  Cl  Cl45  1  0.234  0.133  0.573  1.0
  Cl  Cl46  1  0.942  0.058  0.250  1.0
  Cl  Cl47  1  0.281  0.444  0.509  1.0
  Cl  Cl48  1  0.066  0.177  0.140  1.0
  Cl  Cl49  1  0.177  0.066  0.640  1.0
[/CIF]
.
The structure described by Yb8Cl17 is Baddeleyite-like structured and crystallizes in the monoclinic C2/c space group. There are four inequivalent Yb sites. In the first Yb site, Yb(1) is bonded to two equivalent Cl(5), two equivalent Cl(8), and three equivalent Cl(6) atoms to form a mixture of distorted corner and edge-sharing YbCl7 pentagonal bipyramids. In the second Yb site, Yb(2) is bonded in a 8-coordinate geometry to one Cl(1), two equivalent Cl(4), two equivalent Cl(9), and three equivalent Cl(2) atoms. In the third Yb site, Yb(3) is bonded to one Cl(7), two equivalent Cl(1), two equivalent Cl(3), and two equivalent Cl(4) atoms to form a mixture of distorted corner and edge-sharing YbCl7 pentagonal bipyramids. In the fourth Yb site, Yb(4) is bonded to one Cl(8), two equivalent Cl(3), two equivalent Cl(5), and two equivalent Cl(7) atoms to form a mixture of distorted corner and edge-sharing YbCl7 pentagonal bipyramids. There are nine inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a distorted trigonal planar geometry to one Yb(2) and two equivalent Yb(3) atoms. In the second Cl site, Cl(2) is bonded in a 3-coordinate geometry to three equivalent Yb(2) atoms. In the third Cl site, Cl(3) is bonded to two equivalent Yb(3) and two equivalent Yb(4) atoms to form a mixture of corner and edge-sharing ClYb4 tetrahedra. In the fourth Cl site, Cl(4) is bonded to two equivalent Yb(2) and two equivalent Yb(3) atoms to form a mixture of corner and edge-sharing ClYb4 tetrahedra. In the fifth Cl site, Cl(5) is bonded to two equivalent Yb(1) and two equivalent Yb(4) atoms to form a mixture of corner and edge-sharing ClYb4 tetrahedra. In the sixth Cl site, Cl(6) is bonded in a trigonal non-coplanar geometry to three equivalent Yb(1) atoms. In the seventh Cl site, Cl(7) is bonded in a trigonal planar geometry to one Yb(3) and two equivalent Yb(4) atoms. In the eighth Cl site, Cl(8) is bonded in a trigonal planar geometry to one Yb(4) and two equivalent Yb(1) atoms. In the ninth Cl site, Cl(9) is bonded to four equivalent Yb(2) atoms to form a mixture of corner and edge-sharing ClYb4 tetrahedra. is represented by the CIF card [CIF]
data_Yb8Cl17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   27.412
_cell_length_b   27.412
_cell_length_c   6.880
_cell_angle_alpha   83.827
_cell_angle_beta   83.827
_cell_angle_gamma   13.760
_symmetry_Int_Tables_number   1
_cell_volume   1222.504
_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
  Yb  Yb0  1  0.991  0.440  0.363  1.0
  Yb  Yb1  1  0.253  0.808  0.429  1.0
  Yb  Yb2  1  0.685  0.132  0.039  1.0
  Yb  Yb3  1  0.623  0.070  0.687  1.0
  Yb  Yb4  1  0.747  0.192  0.571  1.0
  Yb  Yb5  1  0.808  0.253  0.929  1.0
  Yb  Yb6  1  0.560  0.009  0.137  1.0
  Yb  Yb7  1  0.009  0.560  0.637  1.0
  Yb  Yb8  1  0.930  0.377  0.813  1.0
  Yb  Yb9  1  0.315  0.868  0.961  1.0
  Yb  Yb10  1  0.377  0.930  0.313  1.0
  Yb  Yb11  1  0.192  0.747  0.071  1.0
  Yb  Yb12  1  0.070  0.623  0.187  1.0
  Yb  Yb13  1  0.440  0.991  0.863  1.0
  Yb  Yb14  1  0.868  0.315  0.461  1.0
  Yb  Yb15  1  0.132  0.685  0.539  1.0
  Cl  Cl16  1  0.673  0.486  0.818  1.0
  Cl  Cl17  1  0.579  0.369  0.923  1.0
  Cl  Cl18  1  0.934  0.823  0.860  1.0
  Cl  Cl19  1  0.996  0.882  0.804  1.0
  Cl  Cl20  1  0.882  0.996  0.304  1.0
  Cl  Cl21  1  0.766  0.867  0.427  1.0
  Cl  Cl22  1  0.226  0.264  0.611  1.0
  Cl  Cl23  1  0.867  0.766  0.927  1.0
  Cl  Cl24  1  0.421  0.631  0.077  1.0
  Cl  Cl25  1  0.719  0.556  0.491  1.0
  Cl  Cl26  1  0.243  0.365  0.307  1.0
  Cl  Cl27  1  0.327  0.514  0.182  1.0
  Cl  Cl28  1  0.757  0.635  0.693  1.0
  Cl  Cl29  1  0.004  0.118  0.196  1.0
  Cl  Cl30  1  0.264  0.226  0.111  1.0
  Cl  Cl31  1  0.631  0.421  0.577  1.0
  Cl  Cl32  1  0.118  0.004  0.696  1.0
  Cl  Cl33  1  0.556  0.719  0.991  1.0
  Cl  Cl34  1  0.365  0.243  0.807  1.0
  Cl  Cl35  1  0.058  0.942  0.750  1.0
  Cl  Cl36  1  0.635  0.757  0.193  1.0
  Cl  Cl37  1  0.486  0.673  0.318  1.0
  Cl  Cl38  1  0.444  0.281  0.009  1.0
  Cl  Cl39  1  0.133  0.234  0.073  1.0
  Cl  Cl40  1  0.514  0.327  0.682  1.0
  Cl  Cl41  1  0.774  0.736  0.389  1.0
  Cl  Cl42  1  0.369  0.579  0.423  1.0
  Cl  Cl43  1  0.736  0.774  0.889  1.0
  Cl  Cl44  1  0.823  0.934  0.360  1.0
  Cl  Cl45  1  0.234  0.133  0.573  1.0
  Cl  Cl46  1  0.942  0.058  0.250  1.0
  Cl  Cl47  1  0.281  0.444  0.509  1.0
  Cl  Cl48  1  0.066  0.177  0.140  1.0
  Cl  Cl49  1  0.177  0.066  0.640  1.0
[/CIF]
.