The crystal structure described by U8ScS17 crystallizes in the monoclinic C2/m space group. There are three inequivalent U sites. In the first U site, U(1) is bonded in a 8-coordinate geometry to one S(2), one S(5), one S(6), one S(7), and four equivalent S(3) atoms. In the second U site, U(2) is bonded in a 8-coordinate geometry to one S(1), one S(2), one S(4), one S(5), one S(6), one S(7), and two equivalent S(3) atoms. In the third U site, U(3) is bonded in a 8-coordinate geometry to one S(2), one S(5), two equivalent S(1), and four equivalent S(4) atoms. Sc(1) is bonded in an octahedral geometry to two equivalent S(6) and four equivalent S(4) atoms. There are seven inequivalent S sites. In the first S site, S(7) is bonded to two equivalent U(1) and four equivalent U(2) atoms to form SU6 octahedra that share corners with four equivalent S(4)ScU3 tetrahedra, corners with four equivalent S(1)U4 trigonal pyramids, and faces with two equivalent S(6)ScU3 trigonal pyramids. In the second S site, S(1) is bonded to two equivalent U(2) and two equivalent U(3) atoms to form SU4 trigonal pyramids that share corners with two equivalent S(7)U6 octahedra, corners with six equivalent S(4)ScU3 tetrahedra, corners with two equivalent S(6)ScU3 trigonal pyramids, edges with two equivalent S(4)ScU3 tetrahedra, and  an edgeedge with one S(1)U4 trigonal pyramid. The corner-sharing octahedral tilt angles are 36°. In the third S site, S(2) is bonded in a rectangular see-saw-like geometry to one U(1), one U(3), and two equivalent U(2) atoms. In the fourth S site, S(3) is bonded in a rectangular see-saw-like geometry to two equivalent U(1) and two equivalent U(2) atoms. In the fifth S site, S(4) is bonded to one U(2), two equivalent U(3), and one Sc(1) atom to form distorted SScU3 tetrahedra that share  a cornercorner with one S(7)U6 octahedra, corners with five equivalent S(4)ScU3 tetrahedra,  a cornercorner with one S(6)ScU3 trigonal pyramid, corners with three equivalent S(1)U4 trigonal pyramids, edges with two equivalent S(4)ScU3 tetrahedra,  an edgeedge with one S(6)ScU3 trigonal pyramid, and  an edgeedge with one S(1)U4 trigonal pyramid. The corner-sharing octahedral tilt angles are 53°. In the sixth S site, S(5) is bonded in a rectangular see-saw-like geometry to one U(1), one U(3), and two equivalent U(2) atoms. In the seventh S site, S(6) is bonded to one U(1), two equivalent U(2), and one Sc(1) atom to form distorted SScU3 trigonal pyramids that share corners with two equivalent S(4)ScU3 tetrahedra,  a cornercorner with one S(6)ScU3 trigonal pyramid, corners with two equivalent S(1)U4 trigonal pyramids, edges with two equivalent S(4)ScU3 tetrahedra, and  a faceface with one S(7)U6 octahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_ScU8S17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.948
_cell_length_b   7.948
_cell_length_c   10.591
_cell_angle_alpha   80.322
_cell_angle_beta   80.322
_cell_angle_gamma   64.744
_symmetry_Int_Tables_number   1
_cell_volume   593.048
_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
  Sc  Sc0  1  0.000  0.000  0.000  1.0
  U  U1  1  0.795  0.795  0.461  1.0
  U  U2  1  0.205  0.205  0.539  1.0
  U  U3  1  0.699  0.185  0.701  1.0
  U  U4  1  0.185  0.699  0.701  1.0
  U  U5  1  0.815  0.301  0.299  1.0
  U  U6  1  0.680  0.680  0.983  1.0
  U  U7  1  0.320  0.320  0.017  1.0
  U  U8  1  0.301  0.815  0.299  1.0
  S  S9  1  0.480  0.480  0.168  1.0
  S  S10  1  0.695  0.695  0.249  1.0
  S  S11  1  0.569  0.175  0.467  1.0
  S  S12  1  0.058  0.670  0.966  1.0
  S  S13  1  0.208  0.208  0.277  1.0
  S  S14  1  0.431  0.825  0.533  1.0
  S  S15  1  0.520  0.520  0.832  1.0
  S  S16  1  0.670  0.058  0.966  1.0
  S  S17  1  0.940  0.940  0.235  1.0
  S  S18  1  0.060  0.060  0.765  1.0
  S  S19  1  0.305  0.305  0.751  1.0
  S  S20  1  0.330  0.942  0.034  1.0
  S  S21  1  0.825  0.431  0.533  1.0
  S  S22  1  0.942  0.330  0.034  1.0
  S  S23  1  0.175  0.569  0.467  1.0
  S  S24  1  0.000  0.000  0.500  1.0
  S  S25  1  0.792  0.792  0.723  1.0
[/CIF]
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The crystal structure described by U8ScS17 crystallizes in the monoclinic C2/m space group. There are three inequivalent U sites. In the first U site, U(1) is bonded in a 8-coordinate geometry to one S(2), one S(5), one S(6), one S(7), and four equivalent S(3) atoms. In the second U site, U(2) is bonded in a 8-coordinate geometry to one S(1), one S(2), one S(4), one S(5), one S(6), one S(7), and two equivalent S(3) atoms. In the third U site, U(3) is bonded in a 8-coordinate geometry to one S(2), one S(5), two equivalent S(1), and four equivalent S(4) atoms. Sc(1) is bonded in an octahedral geometry to two equivalent S(6) and four equivalent S(4) atoms. There are seven inequivalent S sites. In the first S site, S(7) is bonded to two equivalent U(1) and four equivalent U(2) atoms to form SU6 octahedra that share corners with four equivalent S(4)ScU3 tetrahedra, corners with four equivalent S(1)U4 trigonal pyramids, and faces with two equivalent S(6)ScU3 trigonal pyramids. In the second S site, S(1) is bonded to two equivalent U(2) and two equivalent U(3) atoms to form SU4 trigonal pyramids that share corners with two equivalent S(7)U6 octahedra, corners with six equivalent S(4)ScU3 tetrahedra, corners with two equivalent S(6)ScU3 trigonal pyramids, edges with two equivalent S(4)ScU3 tetrahedra, and  an edgeedge with one S(1)U4 trigonal pyramid. The corner-sharing octahedral tilt angles are 36°. In the third S site, S(2) is bonded in a rectangular see-saw-like geometry to one U(1), one U(3), and two equivalent U(2) atoms. In the fourth S site, S(3) is bonded in a rectangular see-saw-like geometry to two equivalent U(1) and two equivalent U(2) atoms. In the fifth S site, S(4) is bonded to one U(2), two equivalent U(3), and one Sc(1) atom to form distorted SScU3 tetrahedra that share  a cornercorner with one S(7)U6 octahedra, corners with five equivalent S(4)ScU3 tetrahedra,  a cornercorner with one S(6)ScU3 trigonal pyramid, corners with three equivalent S(1)U4 trigonal pyramids, edges with two equivalent S(4)ScU3 tetrahedra,  an edgeedge with one S(6)ScU3 trigonal pyramid, and  an edgeedge with one S(1)U4 trigonal pyramid. The corner-sharing octahedral tilt angles are 53°. In the sixth S site, S(5) is bonded in a rectangular see-saw-like geometry to one U(1), one U(3), and two equivalent U(2) atoms. In the seventh S site, S(6) is bonded to one U(1), two equivalent U(2), and one Sc(1) atom to form distorted SScU3 trigonal pyramids that share corners with two equivalent S(4)ScU3 tetrahedra,  a cornercorner with one S(6)ScU3 trigonal pyramid, corners with two equivalent S(1)U4 trigonal pyramids, edges with two equivalent S(4)ScU3 tetrahedra, and  a faceface with one S(7)U6 octahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_ScU8S17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.948
_cell_length_b   7.948
_cell_length_c   10.591
_cell_angle_alpha   80.322
_cell_angle_beta   80.322
_cell_angle_gamma   64.744
_symmetry_Int_Tables_number   1
_cell_volume   593.048
_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
  Sc  Sc0  1  0.000  0.000  0.000  1.0
  U  U1  1  0.795  0.795  0.461  1.0
  U  U2  1  0.205  0.205  0.539  1.0
  U  U3  1  0.699  0.185  0.701  1.0
  U  U4  1  0.185  0.699  0.701  1.0
  U  U5  1  0.815  0.301  0.299  1.0
  U  U6  1  0.680  0.680  0.983  1.0
  U  U7  1  0.320  0.320  0.017  1.0
  U  U8  1  0.301  0.815  0.299  1.0
  S  S9  1  0.480  0.480  0.168  1.0
  S  S10  1  0.695  0.695  0.249  1.0
  S  S11  1  0.569  0.175  0.467  1.0
  S  S12  1  0.058  0.670  0.966  1.0
  S  S13  1  0.208  0.208  0.277  1.0
  S  S14  1  0.431  0.825  0.533  1.0
  S  S15  1  0.520  0.520  0.832  1.0
  S  S16  1  0.670  0.058  0.966  1.0
  S  S17  1  0.940  0.940  0.235  1.0
  S  S18  1  0.060  0.060  0.765  1.0
  S  S19  1  0.305  0.305  0.751  1.0
  S  S20  1  0.330  0.942  0.034  1.0
  S  S21  1  0.825  0.431  0.533  1.0
  S  S22  1  0.942  0.330  0.034  1.0
  S  S23  1  0.175  0.569  0.467  1.0
  S  S24  1  0.000  0.000  0.500  1.0
  S  S25  1  0.792  0.792  0.723  1.0
[/CIF]
.