The material described by K3Nb2Ag3S8 crystallizes in the monoclinic C2/c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to one S(4), two equivalent S(3), and three equivalent S(2) atoms. In the second K site, K(2) is bonded in a distorted body-centered cubic geometry to two equivalent S(2), two equivalent S(4), and four equivalent S(1) atoms. Nb(1) is bonded to one S(1), one S(2), one S(3), and one S(4) atom to form NbS4 tetrahedra that share  an edgeedge with one Ag(1)S4 tetrahedra and edges with two equivalent Ag(2)S4 tetrahedra. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded to two equivalent S(1) and two equivalent S(4) atoms to form distorted AgS4 tetrahedra that share corners with four equivalent Ag(2)S4 tetrahedra and edges with two equivalent Nb(1)S4 tetrahedra. In the second Ag site, Ag(2) is bonded to one S(1), one S(2), one S(3), and one S(4) atom to form distorted AgS4 tetrahedra that share corners with two equivalent Ag(1)S4 tetrahedra and edges with two equivalent Nb(1)S4 tetrahedra. There are four inequivalent S sites. In the first S site, S(1) is bonded in a 5-coordinate geometry to two equivalent K(2), one Nb(1), one Ag(1), and one Ag(2) atom. In the second S site, S(2) is bonded in a 6-coordinate geometry to one K(2), three equivalent K(1), one Nb(1), and one Ag(2) atom. In the third S site, S(3) is bonded in a 4-coordinate geometry to two equivalent K(1), one Nb(1), and one Ag(2) atom. In the fourth S site, S(4) is bonded in a 5-coordinate geometry to one K(1), one K(2), one Nb(1), one Ag(1), and one Ag(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K3Nb2Ag3S8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.864
_cell_length_b   12.864
_cell_length_c   14.430
_cell_angle_alpha   60.838
_cell_angle_beta   60.838
_cell_angle_gamma   26.868
_symmetry_Int_Tables_number   1
_cell_volume   933.998
_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
  K  K0  1  0.638  0.754  0.399  1.0
  K  K1  1  0.362  0.246  0.601  1.0
  K  K2  1  0.754  0.638  0.899  1.0
  K  K3  1  0.000  0.000  0.500  1.0
  K  K4  1  0.246  0.362  0.101  1.0
  K  K5  1  0.000  0.000  0.000  1.0
  Nb  Nb6  1  0.156  0.588  0.779  1.0
  Nb  Nb7  1  0.844  0.412  0.221  1.0
  Nb  Nb8  1  0.588  0.156  0.279  1.0
  Nb  Nb9  1  0.412  0.844  0.721  1.0
  Ag  Ag10  1  0.283  0.717  0.750  1.0
  Ag  Ag11  1  0.717  0.283  0.250  1.0
  Ag  Ag12  1  0.657  0.089  0.785  1.0
  Ag  Ag13  1  0.911  0.343  0.715  1.0
  Ag  Ag14  1  0.343  0.911  0.215  1.0
  Ag  Ag15  1  0.089  0.657  0.285  1.0
  S  S16  1  0.545  0.547  0.347  1.0
  S  S17  1  0.099  0.217  0.316  1.0
  S  S18  1  0.289  0.288  0.392  1.0
  S  S19  1  0.976  0.826  0.884  1.0
  S  S20  1  0.024  0.174  0.116  1.0
  S  S21  1  0.453  0.455  0.153  1.0
  S  S22  1  0.826  0.976  0.384  1.0
  S  S23  1  0.455  0.453  0.653  1.0
  S  S24  1  0.174  0.024  0.616  1.0
  S  S25  1  0.288  0.289  0.892  1.0
  S  S26  1  0.712  0.711  0.108  1.0
  S  S27  1  0.711  0.712  0.608  1.0
  S  S28  1  0.783  0.901  0.184  1.0
  S  S29  1  0.901  0.783  0.684  1.0
  S  S30  1  0.547  0.545  0.847  1.0
  S  S31  1  0.217  0.099  0.816  1.0
[/CIF]
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The material described by K3Nb2Ag3S8 crystallizes in the monoclinic C2/c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to one S(4), two equivalent S(3), and three equivalent S(2) atoms. In the second K site, K(2) is bonded in a distorted body-centered cubic geometry to two equivalent S(2), two equivalent S(4), and four equivalent S(1) atoms. Nb(1) is bonded to one S(1), one S(2), one S(3), and one S(4) atom to form NbS4 tetrahedra that share  an edgeedge with one Ag(1)S4 tetrahedra and edges with two equivalent Ag(2)S4 tetrahedra. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded to two equivalent S(1) and two equivalent S(4) atoms to form distorted AgS4 tetrahedra that share corners with four equivalent Ag(2)S4 tetrahedra and edges with two equivalent Nb(1)S4 tetrahedra. In the second Ag site, Ag(2) is bonded to one S(1), one S(2), one S(3), and one S(4) atom to form distorted AgS4 tetrahedra that share corners with two equivalent Ag(1)S4 tetrahedra and edges with two equivalent Nb(1)S4 tetrahedra. There are four inequivalent S sites. In the first S site, S(1) is bonded in a 5-coordinate geometry to two equivalent K(2), one Nb(1), one Ag(1), and one Ag(2) atom. In the second S site, S(2) is bonded in a 6-coordinate geometry to one K(2), three equivalent K(1), one Nb(1), and one Ag(2) atom. In the third S site, S(3) is bonded in a 4-coordinate geometry to two equivalent K(1), one Nb(1), and one Ag(2) atom. In the fourth S site, S(4) is bonded in a 5-coordinate geometry to one K(1), one K(2), one Nb(1), one Ag(1), and one Ag(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K3Nb2Ag3S8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.864
_cell_length_b   12.864
_cell_length_c   14.430
_cell_angle_alpha   60.838
_cell_angle_beta   60.838
_cell_angle_gamma   26.868
_symmetry_Int_Tables_number   1
_cell_volume   933.998
_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
  K  K0  1  0.638  0.754  0.399  1.0
  K  K1  1  0.362  0.246  0.601  1.0
  K  K2  1  0.754  0.638  0.899  1.0
  K  K3  1  0.000  0.000  0.500  1.0
  K  K4  1  0.246  0.362  0.101  1.0
  K  K5  1  0.000  0.000  0.000  1.0
  Nb  Nb6  1  0.156  0.588  0.779  1.0
  Nb  Nb7  1  0.844  0.412  0.221  1.0
  Nb  Nb8  1  0.588  0.156  0.279  1.0
  Nb  Nb9  1  0.412  0.844  0.721  1.0
  Ag  Ag10  1  0.283  0.717  0.750  1.0
  Ag  Ag11  1  0.717  0.283  0.250  1.0
  Ag  Ag12  1  0.657  0.089  0.785  1.0
  Ag  Ag13  1  0.911  0.343  0.715  1.0
  Ag  Ag14  1  0.343  0.911  0.215  1.0
  Ag  Ag15  1  0.089  0.657  0.285  1.0
  S  S16  1  0.545  0.547  0.347  1.0
  S  S17  1  0.099  0.217  0.316  1.0
  S  S18  1  0.289  0.288  0.392  1.0
  S  S19  1  0.976  0.826  0.884  1.0
  S  S20  1  0.024  0.174  0.116  1.0
  S  S21  1  0.453  0.455  0.153  1.0
  S  S22  1  0.826  0.976  0.384  1.0
  S  S23  1  0.455  0.453  0.653  1.0
  S  S24  1  0.174  0.024  0.616  1.0
  S  S25  1  0.288  0.289  0.892  1.0
  S  S26  1  0.712  0.711  0.108  1.0
  S  S27  1  0.711  0.712  0.608  1.0
  S  S28  1  0.783  0.901  0.184  1.0
  S  S29  1  0.901  0.783  0.684  1.0
  S  S30  1  0.547  0.545  0.847  1.0
  S  S31  1  0.217  0.099  0.816  1.0
[/CIF]
.