The compound described by Yb5S9 crystallizes in the monoclinic C2 space group. There are five inequivalent Yb sites. In the first Yb site, Yb(1) is bonded to one S(3), one S(8), two equivalent S(6), and two equivalent S(9) atoms to form YbS6 octahedra that share  a cornercorner with one Yb(2)S6 octahedra,  a cornercorner with one Yb(4)S6 octahedra, corners with two equivalent Yb(1)S6 octahedra,  a cornercorner with one Yb(5)S7 pentagonal bipyramid,  an edgeedge with one Yb(1)S6 octahedra, edges with two equivalent Yb(2)S6 octahedra, edges with four equivalent Yb(3)S6 octahedra, and  an edgeedge with one Yb(5)S7 pentagonal bipyramid. The corner-sharing octahedral tilt angles range from 1-9°. In the second Yb site, Yb(2) is bonded to one S(10), one S(3), one S(6), one S(7), and two equivalent S(8) atoms to form YbS6 octahedra that share  a cornercorner with one Yb(1)S6 octahedra,  a cornercorner with one Yb(3)S6 octahedra, corners with two equivalent Yb(2)S6 octahedra,  a cornercorner with one Yb(5)S7 pentagonal bipyramid,  an edgeedge with one Yb(3)S6 octahedra, edges with two equivalent Yb(1)S6 octahedra, edges with three equivalent Yb(4)S6 octahedra, and edges with two equivalent Yb(5)S7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 0-9°. In the third Yb site, Yb(3) is bonded to one S(2), one S(7), two equivalent S(6), and two equivalent S(9) atoms to form YbS6 octahedra that share  a cornercorner with one Yb(2)S6 octahedra, corners with two equivalent Yb(3)S6 octahedra, corners with two equivalent Yb(4)S6 octahedra,  an edgeedge with one Yb(2)S6 octahedra,  an edgeedge with one Yb(3)S6 octahedra, edges with four equivalent Yb(1)S6 octahedra, and edges with two equivalent Yb(5)S7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 0-34°. In the fourth Yb site, Yb(4) is bonded to one S(2), one S(7), one S(8), and three equivalent S(10) atoms to form YbS6 octahedra that share  a cornercorner with one Yb(1)S6 octahedra, corners with two equivalent Yb(3)S6 octahedra, corners with two equivalent Yb(4)S6 octahedra, edges with two equivalent Yb(4)S6 octahedra, edges with three equivalent Yb(2)S6 octahedra, and edges with three equivalent Yb(5)S7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 1-34°. In the fifth Yb site, Yb(5) is bonded to one S(1), one S(10), one S(5), one S(8), one S(9), and two equivalent S(7) atoms to form distorted YbS7 pentagonal bipyramids that share  a cornercorner with one Yb(1)S6 octahedra,  a cornercorner with one Yb(2)S6 octahedra, corners with two equivalent Yb(5)S7 pentagonal bipyramids,  an edgeedge with one Yb(1)S6 octahedra, edges with two equivalent Yb(2)S6 octahedra, edges with two equivalent Yb(3)S6 octahedra, edges with three equivalent Yb(4)S6 octahedra, and  an edgeedge with one Yb(5)S7 pentagonal bipyramid. The corner-sharing octahedral tilt angles are 3°. There are ten inequivalent S sites. In the first S site, S(10) is bonded to one Yb(2), one Yb(5), and three equivalent Yb(4) atoms to form a mixture of corner and edge-sharing SYb5 square pyramids. In the second S site, S(1) is bonded in a 3-coordinate geometry to two equivalent Yb(5) and one S(5) atom. In the third S site, S(2) is bonded in a T-shaped geometry to one Yb(3), one Yb(4), and one S(4) atom. In the fourth S site, S(3) is bonded in a T-shaped geometry to one Yb(1), one Yb(2), and one S(4) atom. In the fifth S site, S(4) is bonded in a water-like geometry to one S(2) and one S(3) atom. In the sixth S site, S(5) is bonded in a 3-coordinate geometry to two equivalent Yb(5) and one S(1) atom. In the seventh S site, S(6) is bonded to one Yb(2), two equivalent Yb(1), and two equivalent Yb(3) atoms to form a mixture of corner and edge-sharing SYb5 square pyramids. In the eighth S site, S(7) is bonded to one Yb(2), one Yb(3), one Yb(4), and two equivalent Yb(5) atoms to form a mixture of corner and edge-sharing SYb5 square pyramids. In the ninth S site, S(8) is bonded to one Yb(1), one Yb(4), one Yb(5), and two equivalent Yb(2) atoms to form a mixture of corner and edge-sharing SYb5 square pyramids. In the tenth S site, S(9) is bonded to one Yb(5), two equivalent Yb(1), and two equivalent Yb(3) atoms to form a mixture of corner and edge-sharing SYb5 square pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Yb5S9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.719
_cell_length_b   10.719
_cell_length_c   12.113
_cell_angle_alpha   77.402
_cell_angle_beta   77.402
_cell_angle_gamma   30.204
_symmetry_Int_Tables_number   1
_cell_volume   682.038
_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  0.577  0.619  0.966  1.0
  Yb  Yb1  1  0.176  0.223  0.764  1.0
  Yb  Yb2  1  0.980  0.020  0.166  1.0
  Yb  Yb3  1  0.772  0.828  0.566  1.0
  Yb  Yb4  1  0.376  0.420  0.366  1.0
  Yb  Yb5  1  0.980  0.020  0.834  1.0
  Yb  Yb6  1  0.580  0.624  0.634  1.0
  Yb  Yb7  1  0.381  0.423  0.034  1.0
  Yb  Yb8  1  0.172  0.228  0.434  1.0
  Yb  Yb9  1  0.777  0.824  0.236  1.0
  S  S10  1  0.658  0.342  0.500  1.0
  S  S11  1  0.236  0.972  0.292  1.0
  S  S12  1  0.028  0.764  0.708  1.0
  S  S13  1  0.695  0.691  0.114  1.0
  S  S14  1  0.309  0.305  0.886  1.0
  S  S15  1  0.984  0.668  0.849  1.0
  S  S16  1  0.311  0.689  0.500  1.0
  S  S17  1  0.332  0.016  0.151  1.0
  S  S18  1  0.879  0.921  0.034  1.0
  S  S19  1  0.080  0.124  0.637  1.0
  S  S20  1  0.277  0.323  0.233  1.0
  S  S21  1  0.485  0.523  0.837  1.0
  S  S22  1  0.677  0.730  0.438  1.0
  S  S23  1  0.477  0.515  0.163  1.0
  S  S24  1  0.677  0.723  0.767  1.0
  S  S25  1  0.876  0.920  0.363  1.0
  S  S26  1  0.079  0.121  0.966  1.0
  S  S27  1  0.270  0.323  0.562  1.0
[/CIF]
.
The compound described by Yb5S9 crystallizes in the monoclinic C2 space group. There are five inequivalent Yb sites. In the first Yb site, Yb(1) is bonded to one S(3), one S(8), two equivalent S(6), and two equivalent S(9) atoms to form YbS6 octahedra that share  a cornercorner with one Yb(2)S6 octahedra,  a cornercorner with one Yb(4)S6 octahedra, corners with two equivalent Yb(1)S6 octahedra,  a cornercorner with one Yb(5)S7 pentagonal bipyramid,  an edgeedge with one Yb(1)S6 octahedra, edges with two equivalent Yb(2)S6 octahedra, edges with four equivalent Yb(3)S6 octahedra, and  an edgeedge with one Yb(5)S7 pentagonal bipyramid. The corner-sharing octahedral tilt angles range from 1-9°. In the second Yb site, Yb(2) is bonded to one S(10), one S(3), one S(6), one S(7), and two equivalent S(8) atoms to form YbS6 octahedra that share  a cornercorner with one Yb(1)S6 octahedra,  a cornercorner with one Yb(3)S6 octahedra, corners with two equivalent Yb(2)S6 octahedra,  a cornercorner with one Yb(5)S7 pentagonal bipyramid,  an edgeedge with one Yb(3)S6 octahedra, edges with two equivalent Yb(1)S6 octahedra, edges with three equivalent Yb(4)S6 octahedra, and edges with two equivalent Yb(5)S7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 0-9°. In the third Yb site, Yb(3) is bonded to one S(2), one S(7), two equivalent S(6), and two equivalent S(9) atoms to form YbS6 octahedra that share  a cornercorner with one Yb(2)S6 octahedra, corners with two equivalent Yb(3)S6 octahedra, corners with two equivalent Yb(4)S6 octahedra,  an edgeedge with one Yb(2)S6 octahedra,  an edgeedge with one Yb(3)S6 octahedra, edges with four equivalent Yb(1)S6 octahedra, and edges with two equivalent Yb(5)S7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 0-34°. In the fourth Yb site, Yb(4) is bonded to one S(2), one S(7), one S(8), and three equivalent S(10) atoms to form YbS6 octahedra that share  a cornercorner with one Yb(1)S6 octahedra, corners with two equivalent Yb(3)S6 octahedra, corners with two equivalent Yb(4)S6 octahedra, edges with two equivalent Yb(4)S6 octahedra, edges with three equivalent Yb(2)S6 octahedra, and edges with three equivalent Yb(5)S7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 1-34°. In the fifth Yb site, Yb(5) is bonded to one S(1), one S(10), one S(5), one S(8), one S(9), and two equivalent S(7) atoms to form distorted YbS7 pentagonal bipyramids that share  a cornercorner with one Yb(1)S6 octahedra,  a cornercorner with one Yb(2)S6 octahedra, corners with two equivalent Yb(5)S7 pentagonal bipyramids,  an edgeedge with one Yb(1)S6 octahedra, edges with two equivalent Yb(2)S6 octahedra, edges with two equivalent Yb(3)S6 octahedra, edges with three equivalent Yb(4)S6 octahedra, and  an edgeedge with one Yb(5)S7 pentagonal bipyramid. The corner-sharing octahedral tilt angles are 3°. There are ten inequivalent S sites. In the first S site, S(10) is bonded to one Yb(2), one Yb(5), and three equivalent Yb(4) atoms to form a mixture of corner and edge-sharing SYb5 square pyramids. In the second S site, S(1) is bonded in a 3-coordinate geometry to two equivalent Yb(5) and one S(5) atom. In the third S site, S(2) is bonded in a T-shaped geometry to one Yb(3), one Yb(4), and one S(4) atom. In the fourth S site, S(3) is bonded in a T-shaped geometry to one Yb(1), one Yb(2), and one S(4) atom. In the fifth S site, S(4) is bonded in a water-like geometry to one S(2) and one S(3) atom. In the sixth S site, S(5) is bonded in a 3-coordinate geometry to two equivalent Yb(5) and one S(1) atom. In the seventh S site, S(6) is bonded to one Yb(2), two equivalent Yb(1), and two equivalent Yb(3) atoms to form a mixture of corner and edge-sharing SYb5 square pyramids. In the eighth S site, S(7) is bonded to one Yb(2), one Yb(3), one Yb(4), and two equivalent Yb(5) atoms to form a mixture of corner and edge-sharing SYb5 square pyramids. In the ninth S site, S(8) is bonded to one Yb(1), one Yb(4), one Yb(5), and two equivalent Yb(2) atoms to form a mixture of corner and edge-sharing SYb5 square pyramids. In the tenth S site, S(9) is bonded to one Yb(5), two equivalent Yb(1), and two equivalent Yb(3) atoms to form a mixture of corner and edge-sharing SYb5 square pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Yb5S9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.719
_cell_length_b   10.719
_cell_length_c   12.113
_cell_angle_alpha   77.402
_cell_angle_beta   77.402
_cell_angle_gamma   30.204
_symmetry_Int_Tables_number   1
_cell_volume   682.038
_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  0.577  0.619  0.966  1.0
  Yb  Yb1  1  0.176  0.223  0.764  1.0
  Yb  Yb2  1  0.980  0.020  0.166  1.0
  Yb  Yb3  1  0.772  0.828  0.566  1.0
  Yb  Yb4  1  0.376  0.420  0.366  1.0
  Yb  Yb5  1  0.980  0.020  0.834  1.0
  Yb  Yb6  1  0.580  0.624  0.634  1.0
  Yb  Yb7  1  0.381  0.423  0.034  1.0
  Yb  Yb8  1  0.172  0.228  0.434  1.0
  Yb  Yb9  1  0.777  0.824  0.236  1.0
  S  S10  1  0.658  0.342  0.500  1.0
  S  S11  1  0.236  0.972  0.292  1.0
  S  S12  1  0.028  0.764  0.708  1.0
  S  S13  1  0.695  0.691  0.114  1.0
  S  S14  1  0.309  0.305  0.886  1.0
  S  S15  1  0.984  0.668  0.849  1.0
  S  S16  1  0.311  0.689  0.500  1.0
  S  S17  1  0.332  0.016  0.151  1.0
  S  S18  1  0.879  0.921  0.034  1.0
  S  S19  1  0.080  0.124  0.637  1.0
  S  S20  1  0.277  0.323  0.233  1.0
  S  S21  1  0.485  0.523  0.837  1.0
  S  S22  1  0.677  0.730  0.438  1.0
  S  S23  1  0.477  0.515  0.163  1.0
  S  S24  1  0.677  0.723  0.767  1.0
  S  S25  1  0.876  0.920  0.363  1.0
  S  S26  1  0.079  0.121  0.966  1.0
  S  S27  1  0.270  0.323  0.562  1.0
[/CIF]
.