The crystal structure described by NbCr3(AgS4)2 crystallizes in the monoclinic P2_1/m space group. Nb(1) is bonded to two equivalent S(1), two equivalent S(3), and two equivalent S(4) atoms to form NbS6 octahedra that share edges with two equivalent Cr(2)S6 octahedra, edges with four equivalent Cr(1)S6 octahedra, and edges with two equivalent Ag(1)S6 pentagonal pyramids. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one S(3), one S(4), two equivalent S(1), and two equivalent S(2) atoms to form CrS6 octahedra that share corners with three equivalent Ag(1)S6 pentagonal pyramids, edges with two equivalent Nb(1)S6 octahedra, edges with two equivalent Cr(1)S6 octahedra, edges with two equivalent Cr(2)S6 octahedra, and  an edgeedge with one Ag(1)S6 pentagonal pyramid. In the second Cr site, Cr(2) is bonded to two equivalent S(2), two equivalent S(3), and two equivalent S(4) atoms to form CrS6 octahedra that share edges with two equivalent Nb(1)S6 octahedra, edges with four equivalent Cr(1)S6 octahedra, and edges with two equivalent Ag(1)S6 pentagonal pyramids. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded to two equivalent S(1), two equivalent S(2), and two equivalent S(3) atoms to form distorted AgS6 pentagonal pyramids that share corners with six equivalent Cr(1)S6 octahedra, edges with two 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 6-11°. In the second Ag site, Ag(2) is bonded in a 6-coordinate geometry to two equivalent S(1), two equivalent S(2), and two equivalent S(4) atoms. There are four inequivalent S sites. In the first S site, S(1) is bonded to one Nb(1), two equivalent Cr(1), one Ag(1), and one Ag(2) atom to form distorted SNbCr2Ag2 trigonal bipyramids that share  a cornercorner with one S(1)NbCr2Ag2 trigonal bipyramid, corners with four equivalent S(2)Cr3Ag2 trigonal bipyramids, edges with two equivalent S(2)Cr3Ag2 trigonal bipyramids, and edges with two equivalent S(1)NbCr2Ag2 trigonal bipyramids. In the second S site, S(2) is bonded to one Cr(2), two equivalent Cr(1), one Ag(1), and one Ag(2) atom to form distorted SCr3Ag2 trigonal bipyramids that share  a cornercorner with one S(2)Cr3Ag2 trigonal bipyramid, corners with four equivalent S(1)NbCr2Ag2 trigonal bipyramids, edges with two equivalent S(2)Cr3Ag2 trigonal bipyramids, and edges with two equivalent S(1)NbCr2Ag2 trigonal bipyramids. In the third S site, S(3) is bonded in a rectangular see-saw-like geometry to one Nb(1), one Cr(1), one Cr(2), and one Ag(1) atom. In the fourth S site, S(4) is bonded in a rectangular see-saw-like geometry to one Nb(1), one Cr(1), one Cr(2), and one Ag(2) atom. is represented by the CIF file [CIF]
data_NbCr3(AgS4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   13.302
_cell_length_b   6.013
_cell_length_c   6.905
_cell_angle_alpha   89.728
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   552.337
_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  0.500  0.500  0.000  1.0
  Nb  Nb1  1  0.000  0.500  0.000  1.0
  Cr  Cr2  1  0.496  0.002  0.751  1.0
  Cr  Cr3  1  0.004  0.002  0.751  1.0
  Cr  Cr4  1  0.504  0.998  0.249  1.0
  Cr  Cr5  1  0.996  0.998  0.249  1.0
  Cr  Cr6  1  0.000  0.500  0.500  1.0
  Cr  Cr7  1  0.500  0.500  0.500  1.0
  Ag  Ag8  1  0.250  0.657  0.744  1.0
  Ag  Ag9  1  0.750  0.343  0.256  1.0
  Ag  Ag10  1  0.750  0.976  0.741  1.0
  Ag  Ag11  1  0.250  0.024  0.259  1.0
  S  S12  1  0.607  0.160  0.999  1.0
  S  S13  1  0.900  0.169  0.499  1.0
  S  S14  1  0.400  0.831  0.501  1.0
  S  S15  1  0.107  0.840  0.001  1.0
  S  S16  1  0.393  0.840  0.001  1.0
  S  S17  1  0.100  0.831  0.501  1.0
  S  S18  1  0.600  0.169  0.499  1.0
  S  S19  1  0.893  0.160  0.999  1.0
  S  S20  1  0.394  0.333  0.743  1.0
  S  S21  1  0.106  0.333  0.743  1.0
  S  S22  1  0.606  0.667  0.257  1.0
  S  S23  1  0.894  0.667  0.257  1.0
  S  S24  1  0.603  0.674  0.743  1.0
  S  S25  1  0.897  0.674  0.743  1.0
  S  S26  1  0.397  0.326  0.257  1.0
  S  S27  1  0.103  0.326  0.257  1.0
[/CIF]
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The crystal structure described by NbCr3(AgS4)2 crystallizes in the monoclinic P2_1/m space group. Nb(1) is bonded to two equivalent S(1), two equivalent S(3), and two equivalent S(4) atoms to form NbS6 octahedra that share edges with two equivalent Cr(2)S6 octahedra, edges with four equivalent Cr(1)S6 octahedra, and edges with two equivalent Ag(1)S6 pentagonal pyramids. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one S(3), one S(4), two equivalent S(1), and two equivalent S(2) atoms to form CrS6 octahedra that share corners with three equivalent Ag(1)S6 pentagonal pyramids, edges with two equivalent Nb(1)S6 octahedra, edges with two equivalent Cr(1)S6 octahedra, edges with two equivalent Cr(2)S6 octahedra, and  an edgeedge with one Ag(1)S6 pentagonal pyramid. In the second Cr site, Cr(2) is bonded to two equivalent S(2), two equivalent S(3), and two equivalent S(4) atoms to form CrS6 octahedra that share edges with two equivalent Nb(1)S6 octahedra, edges with four equivalent Cr(1)S6 octahedra, and edges with two equivalent Ag(1)S6 pentagonal pyramids. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded to two equivalent S(1), two equivalent S(2), and two equivalent S(3) atoms to form distorted AgS6 pentagonal pyramids that share corners with six equivalent Cr(1)S6 octahedra, edges with two 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 6-11°. In the second Ag site, Ag(2) is bonded in a 6-coordinate geometry to two equivalent S(1), two equivalent S(2), and two equivalent S(4) atoms. There are four inequivalent S sites. In the first S site, S(1) is bonded to one Nb(1), two equivalent Cr(1), one Ag(1), and one Ag(2) atom to form distorted SNbCr2Ag2 trigonal bipyramids that share  a cornercorner with one S(1)NbCr2Ag2 trigonal bipyramid, corners with four equivalent S(2)Cr3Ag2 trigonal bipyramids, edges with two equivalent S(2)Cr3Ag2 trigonal bipyramids, and edges with two equivalent S(1)NbCr2Ag2 trigonal bipyramids. In the second S site, S(2) is bonded to one Cr(2), two equivalent Cr(1), one Ag(1), and one Ag(2) atom to form distorted SCr3Ag2 trigonal bipyramids that share  a cornercorner with one S(2)Cr3Ag2 trigonal bipyramid, corners with four equivalent S(1)NbCr2Ag2 trigonal bipyramids, edges with two equivalent S(2)Cr3Ag2 trigonal bipyramids, and edges with two equivalent S(1)NbCr2Ag2 trigonal bipyramids. In the third S site, S(3) is bonded in a rectangular see-saw-like geometry to one Nb(1), one Cr(1), one Cr(2), and one Ag(1) atom. In the fourth S site, S(4) is bonded in a rectangular see-saw-like geometry to one Nb(1), one Cr(1), one Cr(2), and one Ag(2) atom. is represented by the CIF file [CIF]
data_NbCr3(AgS4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   13.302
_cell_length_b   6.013
_cell_length_c   6.905
_cell_angle_alpha   89.728
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   552.337
_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  0.500  0.500  0.000  1.0
  Nb  Nb1  1  0.000  0.500  0.000  1.0
  Cr  Cr2  1  0.496  0.002  0.751  1.0
  Cr  Cr3  1  0.004  0.002  0.751  1.0
  Cr  Cr4  1  0.504  0.998  0.249  1.0
  Cr  Cr5  1  0.996  0.998  0.249  1.0
  Cr  Cr6  1  0.000  0.500  0.500  1.0
  Cr  Cr7  1  0.500  0.500  0.500  1.0
  Ag  Ag8  1  0.250  0.657  0.744  1.0
  Ag  Ag9  1  0.750  0.343  0.256  1.0
  Ag  Ag10  1  0.750  0.976  0.741  1.0
  Ag  Ag11  1  0.250  0.024  0.259  1.0
  S  S12  1  0.607  0.160  0.999  1.0
  S  S13  1  0.900  0.169  0.499  1.0
  S  S14  1  0.400  0.831  0.501  1.0
  S  S15  1  0.107  0.840  0.001  1.0
  S  S16  1  0.393  0.840  0.001  1.0
  S  S17  1  0.100  0.831  0.501  1.0
  S  S18  1  0.600  0.169  0.499  1.0
  S  S19  1  0.893  0.160  0.999  1.0
  S  S20  1  0.394  0.333  0.743  1.0
  S  S21  1  0.106  0.333  0.743  1.0
  S  S22  1  0.606  0.667  0.257  1.0
  S  S23  1  0.894  0.667  0.257  1.0
  S  S24  1  0.603  0.674  0.743  1.0
  S  S25  1  0.897  0.674  0.743  1.0
  S  S26  1  0.397  0.326  0.257  1.0
  S  S27  1  0.103  0.326  0.257  1.0
[/CIF]
.