Ag7NbS6 crystallizes in the triclinic P1 space group. Nb(1) is bonded to one S(3), one S(4), one S(5), and one S(6) atom to form NbS4 tetrahedra that share corners with two equivalent Ag(4)S4 tetrahedra and  an edgeedge with one Ag(2)S4 tetrahedra. There are seven inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 3-coordinate geometry to one S(1), one S(2), and one S(5) atom. 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 three equivalent Ag(4)S4 tetrahedra and  an edgeedge with one Nb(1)S4 tetrahedra. In the third Ag site, Ag(3) is bonded in a 3-coordinate geometry to one S(1), one S(5), and one S(6) atom. In the fourth Ag site, Ag(4) is bonded to one S(1), one S(2), one S(4), and one S(6) atom to form distorted AgS4 tetrahedra that share corners with two equivalent Nb(1)S4 tetrahedra and corners with three equivalent Ag(2)S4 tetrahedra. In the fifth Ag site, Ag(5) is bonded in a 3-coordinate geometry to one S(1), one S(3), and one S(6) atom. In the sixth Ag site, Ag(6) is bonded in a distorted bent 150 degrees geometry to one S(1), one S(2), one S(3), and one S(4) atom. In the seventh Ag site, Ag(7) is bonded in a 3-coordinate geometry to one S(2), one S(3), and one S(6) atom. There are six inequivalent S sites. In the first S site, S(1) is bonded in a 6-coordinate geometry to one Ag(1), one Ag(2), one Ag(3), one Ag(4), one Ag(5), and one Ag(6) atom. In the second S site, S(2) is bonded in a 5-coordinate geometry to one Ag(1), one Ag(2), one Ag(4), one Ag(6), and one Ag(7) atom. In the third S site, S(3) is bonded in a 5-coordinate geometry to one Nb(1), one Ag(2), one Ag(5), one Ag(6), and one Ag(7) atom. In the fourth S site, S(4) is bonded in a distorted see-saw-like geometry to one Nb(1), one Ag(2), one Ag(4), and one Ag(6) atom. In the fifth S site, S(5) is bonded in a 3-coordinate geometry to one Nb(1), one Ag(1), and one Ag(3) atom. In the sixth S site, S(6) is bonded in a distorted trigonal bipyramidal geometry to one Nb(1), one Ag(3), one Ag(4), one Ag(5), and one Ag(7) atom.
Ag7NbS6 crystallizes in the triclinic P1 space group. Nb(1) is bonded to one S(3), one S(4), one S(5), and one S(6) atom to form NbS4 tetrahedra that share corners with two equivalent Ag(4)S4 tetrahedra and  an edgeedge with one Ag(2)S4 tetrahedra. The Nb(1)-S(3) bond length is 2.34 Å. The Nb(1)-S(4) bond length is 2.32 Å. The Nb(1)-S(5) bond length is 2.27 Å. The Nb(1)-S(6) bond length is 2.37 Å. There are seven inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 3-coordinate geometry to one S(1), one S(2), and one S(5) atom. The Ag(1)-S(1) bond length is 2.52 Å. The Ag(1)-S(2) bond length is 2.58 Å. The Ag(1)-S(5) bond length is 2.66 Å. 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 three equivalent Ag(4)S4 tetrahedra and  an edgeedge with one Nb(1)S4 tetrahedra. The Ag(2)-S(1) bond length is 2.56 Å. The Ag(2)-S(2) bond length is 2.69 Å. The Ag(2)-S(3) bond length is 2.62 Å. The Ag(2)-S(4) bond length is 2.83 Å. In the third Ag site, Ag(3) is bonded in a 3-coordinate geometry to one S(1), one S(5), and one S(6) atom. The Ag(3)-S(1) bond length is 2.49 Å. The Ag(3)-S(5) bond length is 2.62 Å. The Ag(3)-S(6) bond length is 2.56 Å. In the fourth Ag site, Ag(4) is bonded to one S(1), one S(2), one S(4), and one S(6) atom to form distorted AgS4 tetrahedra that share corners with two equivalent Nb(1)S4 tetrahedra and corners with three equivalent Ag(2)S4 tetrahedra. The Ag(4)-S(1) bond length is 2.68 Å. The Ag(4)-S(2) bond length is 2.62 Å. The Ag(4)-S(4) bond length is 2.68 Å. The Ag(4)-S(6) bond length is 2.64 Å. In the fifth Ag site, Ag(5) is bonded in a 3-coordinate geometry to one S(1), one S(3), and one S(6) atom. The Ag(5)-S(1) bond length is 2.52 Å. The Ag(5)-S(3) bond length is 2.63 Å. The Ag(5)-S(6) bond length is 2.71 Å. In the sixth Ag site, Ag(6) is bonded in a distorted bent 150 degrees geometry to one S(1), one S(2), one S(3), and one S(4) atom. The Ag(6)-S(1) bond length is 3.13 Å. The Ag(6)-S(2) bond length is 2.51 Å. The Ag(6)-S(3) bond length is 3.14 Å. The Ag(6)-S(4) bond length is 2.49 Å. In the seventh Ag site, Ag(7) is bonded in a 3-coordinate geometry to one S(2), one S(3), and one S(6) atom. The Ag(7)-S(2) bond length is 2.51 Å. The Ag(7)-S(3) bond length is 2.77 Å. The Ag(7)-S(6) bond length is 2.56 Å. There are six inequivalent S sites. In the first S site, S(1) is bonded in a 6-coordinate geometry to one Ag(1), one Ag(2), one Ag(3), one Ag(4), one Ag(5), and one Ag(6) atom. In the second S site, S(2) is bonded in a 5-coordinate geometry to one Ag(1), one Ag(2), one Ag(4), one Ag(6), and one Ag(7) atom. In the third S site, S(3) is bonded in a 5-coordinate geometry to one Nb(1), one Ag(2), one Ag(5), one Ag(6), and one Ag(7) atom. In the fourth S site, S(4) is bonded in a distorted see-saw-like geometry to one Nb(1), one Ag(2), one Ag(4), and one Ag(6) atom. In the fifth S site, S(5) is bonded in a 3-coordinate geometry to one Nb(1), one Ag(1), and one Ag(3) atom. In the sixth S site, S(6) is bonded in a distorted trigonal bipyramidal geometry to one Nb(1), one Ag(3), one Ag(4), one Ag(5), and one Ag(7) atom.