The compound described by NbCr3(AgS4)2 crystallizes in the orthorhombic Pmc2_1 space group. Nb(1) is bonded to one S(6), one S(8), two equivalent S(1), and two equivalent S(5) atoms to form NbS6 octahedra that share corners with four equivalent Cr(2)S6 octahedra, edges with two equivalent Nb(1)S6 octahedra, and edges with two equivalent Cr(3)S6 octahedra. The corner-sharing octahedral tilt angles range from 45-54°. There are three inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one S(2), one S(3), two equivalent S(4), and two equivalent S(7) atoms to form a mixture of corner and edge-sharing CrS6 octahedra. The corner-sharing octahedral tilt angles range from 47-54°. In the second Cr site, Cr(2) is bonded to one S(1), one S(4), two equivalent S(3), and two equivalent S(8) atoms to form CrS6 octahedra that share corners with four equivalent Nb(1)S6 octahedra, edges with two equivalent Cr(1)S6 octahedra, and edges with two equivalent Cr(2)S6 octahedra. The corner-sharing octahedral tilt angles range from 45-54°. In the third Cr site, Cr(3) is bonded to one S(5), one S(7), two equivalent S(2), and two equivalent S(6) atoms to form CrS6 octahedra that share corners with four equivalent Cr(1)S6 octahedra, edges with two equivalent Nb(1)S6 octahedra, and edges with two equivalent Cr(3)S6 octahedra. The corner-sharing octahedral tilt angles range from 47-54°. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 7-coordinate geometry to one S(2), two equivalent S(4), two equivalent S(5), and two equivalent S(7) atoms. In the second Ag site, Ag(2) is bonded in a 8-coordinate geometry to two equivalent S(1), two equivalent S(3), two equivalent S(6), and two equivalent S(8) atoms. There are eight inequivalent S sites. In the first S site, S(1) is bonded in a 5-coordinate geometry to two equivalent Nb(1), one Cr(2), and two equivalent Ag(2) atoms. In the second S site, S(2) is bonded to one Cr(1), two equivalent Cr(3), and one Ag(1) atom to form distorted SCr3Ag trigonal pyramids that share corners with two equivalent S(6)NbCr2Ag2 square pyramids, corners with four equivalent S(5)Nb2CrAg2 trigonal bipyramids, corners with two equivalent S(2)Cr3Ag trigonal pyramids, and  an edgeedge with one S(6)NbCr2Ag2 square pyramid. In the third S site, S(3) is bonded in a 5-coordinate geometry to one Cr(1), two equivalent Cr(2), and two equivalent Ag(2) atoms. In the fourth S site, S(4) is bonded in a 5-coordinate geometry to one Cr(2), two equivalent Cr(1), and two equivalent Ag(1) atoms. In the fifth S site, S(5) is bonded to two equivalent Nb(1), one Cr(3), and two equivalent Ag(1) atoms to form distorted SNb2CrAg2 trigonal bipyramids that share corners with four equivalent S(2)Cr3Ag trigonal pyramids, edges with two equivalent S(6)NbCr2Ag2 square pyramids, and edges with two equivalent S(5)Nb2CrAg2 trigonal bipyramids. In the sixth S site, S(6) is bonded to one Nb(1), two equivalent Cr(3), and two equivalent Ag(2) atoms to form distorted SNbCr2Ag2 square pyramids that share corners with two equivalent S(2)Cr3Ag trigonal pyramids, edges with two equivalent S(6)NbCr2Ag2 square pyramids, edges with two equivalent S(5)Nb2CrAg2 trigonal bipyramids, and  an edgeedge with one S(2)Cr3Ag trigonal pyramid. In the seventh S site, S(7) is bonded in a 5-coordinate geometry to one Cr(3), two equivalent Cr(1), and two equivalent Ag(1) atoms. In the eighth S site, S(8) is bonded in a 3-coordinate geometry to one Nb(1), two equivalent Cr(2), and two equivalent Ag(2) atoms. is represented by the CIF file [CIF]
data_NbCr3(AgS4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.190
_cell_length_b   3.462
_cell_length_c   13.031
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   504.820
_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
  Nb  Nb0  1  0.088  0.250  0.596  1.0
  Nb  Nb1  1  0.588  0.250  0.904  1.0
  Cr  Cr2  1  0.058  0.250  0.117  1.0
  Cr  Cr3  1  0.947  0.750  0.894  1.0
  Cr  Cr4  1  0.447  0.750  0.606  1.0
  Cr  Cr5  1  0.558  0.250  0.383  1.0
  Cr  Cr6  1  0.914  0.750  0.400  1.0
  Cr  Cr7  1  0.414  0.750  0.100  1.0
  Ag  Ag8  1  0.255  0.250  0.318  1.0
  Ag  Ag9  1  0.751  0.750  0.660  1.0
  Ag  Ag10  1  0.251  0.750  0.840  1.0
  Ag  Ag11  1  0.755  0.250  0.182  1.0
  S  S12  1  0.021  0.750  0.718  1.0
  S  S13  1  0.967  0.250  0.286  1.0
  S  S14  1  0.467  0.250  0.214  1.0
  S  S15  1  0.521  0.750  0.782  1.0
  S  S16  1  0.085  0.250  0.934  1.0
  S  S17  1  0.917  0.750  0.072  1.0
  S  S18  1  0.417  0.750  0.428  1.0
  S  S19  1  0.585  0.250  0.566  1.0
  S  S20  1  0.120  0.750  0.460  1.0
  S  S21  1  0.878  0.250  0.525  1.0
  S  S22  1  0.378  0.250  0.975  1.0
  S  S23  1  0.620  0.750  0.040  1.0
  S  S24  1  0.201  0.750  0.153  1.0
  S  S25  1  0.799  0.250  0.854  1.0
  S  S26  1  0.299  0.250  0.646  1.0
  S  S27  1  0.701  0.750  0.347  1.0
[/CIF]
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The compound described by NbCr3(AgS4)2 crystallizes in the orthorhombic Pmc2_1 space group. Nb(1) is bonded to one S(6), one S(8), two equivalent S(1), and two equivalent S(5) atoms to form NbS6 octahedra that share corners with four equivalent Cr(2)S6 octahedra, edges with two equivalent Nb(1)S6 octahedra, and edges with two equivalent Cr(3)S6 octahedra. The corner-sharing octahedral tilt angles range from 45-54°. There are three inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one S(2), one S(3), two equivalent S(4), and two equivalent S(7) atoms to form a mixture of corner and edge-sharing CrS6 octahedra. The corner-sharing octahedral tilt angles range from 47-54°. In the second Cr site, Cr(2) is bonded to one S(1), one S(4), two equivalent S(3), and two equivalent S(8) atoms to form CrS6 octahedra that share corners with four equivalent Nb(1)S6 octahedra, edges with two equivalent Cr(1)S6 octahedra, and edges with two equivalent Cr(2)S6 octahedra. The corner-sharing octahedral tilt angles range from 45-54°. In the third Cr site, Cr(3) is bonded to one S(5), one S(7), two equivalent S(2), and two equivalent S(6) atoms to form CrS6 octahedra that share corners with four equivalent Cr(1)S6 octahedra, edges with two equivalent Nb(1)S6 octahedra, and edges with two equivalent Cr(3)S6 octahedra. The corner-sharing octahedral tilt angles range from 47-54°. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 7-coordinate geometry to one S(2), two equivalent S(4), two equivalent S(5), and two equivalent S(7) atoms. In the second Ag site, Ag(2) is bonded in a 8-coordinate geometry to two equivalent S(1), two equivalent S(3), two equivalent S(6), and two equivalent S(8) atoms. There are eight inequivalent S sites. In the first S site, S(1) is bonded in a 5-coordinate geometry to two equivalent Nb(1), one Cr(2), and two equivalent Ag(2) atoms. In the second S site, S(2) is bonded to one Cr(1), two equivalent Cr(3), and one Ag(1) atom to form distorted SCr3Ag trigonal pyramids that share corners with two equivalent S(6)NbCr2Ag2 square pyramids, corners with four equivalent S(5)Nb2CrAg2 trigonal bipyramids, corners with two equivalent S(2)Cr3Ag trigonal pyramids, and  an edgeedge with one S(6)NbCr2Ag2 square pyramid. In the third S site, S(3) is bonded in a 5-coordinate geometry to one Cr(1), two equivalent Cr(2), and two equivalent Ag(2) atoms. In the fourth S site, S(4) is bonded in a 5-coordinate geometry to one Cr(2), two equivalent Cr(1), and two equivalent Ag(1) atoms. In the fifth S site, S(5) is bonded to two equivalent Nb(1), one Cr(3), and two equivalent Ag(1) atoms to form distorted SNb2CrAg2 trigonal bipyramids that share corners with four equivalent S(2)Cr3Ag trigonal pyramids, edges with two equivalent S(6)NbCr2Ag2 square pyramids, and edges with two equivalent S(5)Nb2CrAg2 trigonal bipyramids. In the sixth S site, S(6) is bonded to one Nb(1), two equivalent Cr(3), and two equivalent Ag(2) atoms to form distorted SNbCr2Ag2 square pyramids that share corners with two equivalent S(2)Cr3Ag trigonal pyramids, edges with two equivalent S(6)NbCr2Ag2 square pyramids, edges with two equivalent S(5)Nb2CrAg2 trigonal bipyramids, and  an edgeedge with one S(2)Cr3Ag trigonal pyramid. In the seventh S site, S(7) is bonded in a 5-coordinate geometry to one Cr(3), two equivalent Cr(1), and two equivalent Ag(1) atoms. In the eighth S site, S(8) is bonded in a 3-coordinate geometry to one Nb(1), two equivalent Cr(2), and two equivalent Ag(2) atoms. is represented by the CIF file [CIF]
data_NbCr3(AgS4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.190
_cell_length_b   3.462
_cell_length_c   13.031
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   504.820
_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
  Nb  Nb0  1  0.088  0.250  0.596  1.0
  Nb  Nb1  1  0.588  0.250  0.904  1.0
  Cr  Cr2  1  0.058  0.250  0.117  1.0
  Cr  Cr3  1  0.947  0.750  0.894  1.0
  Cr  Cr4  1  0.447  0.750  0.606  1.0
  Cr  Cr5  1  0.558  0.250  0.383  1.0
  Cr  Cr6  1  0.914  0.750  0.400  1.0
  Cr  Cr7  1  0.414  0.750  0.100  1.0
  Ag  Ag8  1  0.255  0.250  0.318  1.0
  Ag  Ag9  1  0.751  0.750  0.660  1.0
  Ag  Ag10  1  0.251  0.750  0.840  1.0
  Ag  Ag11  1  0.755  0.250  0.182  1.0
  S  S12  1  0.021  0.750  0.718  1.0
  S  S13  1  0.967  0.250  0.286  1.0
  S  S14  1  0.467  0.250  0.214  1.0
  S  S15  1  0.521  0.750  0.782  1.0
  S  S16  1  0.085  0.250  0.934  1.0
  S  S17  1  0.917  0.750  0.072  1.0
  S  S18  1  0.417  0.750  0.428  1.0
  S  S19  1  0.585  0.250  0.566  1.0
  S  S20  1  0.120  0.750  0.460  1.0
  S  S21  1  0.878  0.250  0.525  1.0
  S  S22  1  0.378  0.250  0.975  1.0
  S  S23  1  0.620  0.750  0.040  1.0
  S  S24  1  0.201  0.750  0.153  1.0
  S  S25  1  0.799  0.250  0.854  1.0
  S  S26  1  0.299  0.250  0.646  1.0
  S  S27  1  0.701  0.750  0.347  1.0
[/CIF]
.