Ag9Si2NO11 crystallizes in the triclinic P1 space group. There are nine inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a distorted trigonal planar geometry to one O(3), one O(5), and one O(8) atom. In the second Ag site, Ag(2) is bonded in a 4-coordinate geometry to one O(11), one O(4), one O(6), and one O(7) atom. In the third Ag site, Ag(3) is bonded in a distorted rectangular see-saw-like geometry to one O(10), one O(2), one O(8), and one O(9) atom. In the fourth Ag site, Ag(4) is bonded in a 3-coordinate geometry to one O(1), one O(7), and one O(9) atom. In the fifth Ag site, Ag(5) is bonded in a linear geometry to one O(3) and one O(4) atom. In the sixth Ag site, Ag(6) is bonded to one O(11), one O(2), one O(6), and one O(7) atom to form distorted AgO4 trigonal pyramids that share  a cornercorner with one Si(2)O4 tetrahedra and corners with two equivalent Si(1)O4 tetrahedra. In the seventh Ag site, Ag(7) is bonded in a distorted trigonal planar geometry to one O(1), one O(5), and one O(8) atom. In the eighth Ag site, Ag(8) is bonded in a 3-coordinate geometry to one O(1), one O(3), and one O(5) atom. In the ninth Ag site, Ag(9) is bonded in a distorted T-shaped geometry to one O(2), one O(4), and one O(6) atom. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(2), one O(4), one O(5), and one O(7) atom to form SiO4 tetrahedra that share corners with two equivalent Ag(6)O4 trigonal pyramids. In the second Si site, Si(2) is bonded to one O(1), one O(3), one O(6), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Ag(6)O4 trigonal pyramid. N(1) is bonded in a trigonal planar geometry to one O(10), one O(11), and one O(9) atom. There are eleven inequivalent O sites. In the first O site, O(1) is bonded to one Ag(4), one Ag(7), one Ag(8), and one Si(2) atom to form distorted corner-sharing OSiAg3 tetrahedra. In the second O site, O(2) is bonded to one Ag(3), one Ag(6), one Ag(9), and one Si(1) atom to form distorted corner-sharing OSiAg3 tetrahedra. In the third O site, O(3) is bonded to one Ag(1), one Ag(5), one Ag(8), and one Si(2) atom to form distorted corner-sharing OSiAg3 tetrahedra. In the fourth O site, O(4) is bonded to one Ag(2), one Ag(5), one Ag(9), and one Si(1) atom to form distorted corner-sharing OSiAg3 tetrahedra. In the fifth O site, O(5) is bonded to one Ag(1), one Ag(7), one Ag(8), and one Si(1) atom to form distorted corner-sharing OSiAg3 tetrahedra. In the sixth O site, O(6) is bonded to one Ag(2), one Ag(6), one Ag(9), and one Si(2) atom to form distorted corner-sharing OSiAg3 tetrahedra. In the seventh O site, O(7) is bonded to one Ag(2), one Ag(4), one Ag(6), and one Si(1) atom to form distorted corner-sharing OSiAg3 tetrahedra. In the eighth O site, O(8) is bonded to one Ag(1), one Ag(3), one Ag(7), and one Si(2) atom to form distorted corner-sharing OSiAg3 tetrahedra. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one Ag(3), one Ag(4), and one N(1) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one Ag(3) and one N(1) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to one Ag(2), one Ag(6), and one N(1) atom.
Ag9Si2NO11 crystallizes in the triclinic P1 space group. There are nine inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a distorted trigonal planar geometry to one O(3), one O(5), and one O(8) atom. The Ag(1)-O(3) bond length is 2.31 Å. The Ag(1)-O(5) bond length is 2.35 Å. The Ag(1)-O(8) bond length is 2.39 Å. In the second Ag site, Ag(2) is bonded in a 4-coordinate geometry to one O(11), one O(4), one O(6), and one O(7) atom. The Ag(2)-O(11) bond length is 2.71 Å. The Ag(2)-O(4) bond length is 2.34 Å. The Ag(2)-O(6) bond length is 2.39 Å. The Ag(2)-O(7) bond length is 2.37 Å. In the third Ag site, Ag(3) is bonded in a distorted rectangular see-saw-like geometry to one O(10), one O(2), one O(8), and one O(9) atom. The Ag(3)-O(10) bond length is 2.65 Å. The Ag(3)-O(2) bond length is 2.19 Å. The Ag(3)-O(8) bond length is 2.20 Å. The Ag(3)-O(9) bond length is 2.64 Å. In the fourth Ag site, Ag(4) is bonded in a 3-coordinate geometry to one O(1), one O(7), and one O(9) atom. The Ag(4)-O(1) bond length is 2.20 Å. The Ag(4)-O(7) bond length is 2.20 Å. The Ag(4)-O(9) bond length is 2.60 Å. In the fifth Ag site, Ag(5) is bonded in a linear geometry to one O(3) and one O(4) atom. The Ag(5)-O(3) bond length is 2.14 Å. The Ag(5)-O(4) bond length is 2.14 Å. In the sixth Ag site, Ag(6) is bonded to one O(11), one O(2), one O(6), and one O(7) atom to form distorted AgO4 trigonal pyramids that share  a cornercorner with one Si(2)O4 tetrahedra and corners with two equivalent Si(1)O4 tetrahedra. The Ag(6)-O(11) bond length is 2.66 Å. The Ag(6)-O(2) bond length is 2.45 Å. The Ag(6)-O(6) bond length is 2.34 Å. The Ag(6)-O(7) bond length is 2.33 Å. In the seventh Ag site, Ag(7) is bonded in a distorted trigonal planar geometry to one O(1), one O(5), and one O(8) atom. The Ag(7)-O(1) bond length is 2.45 Å. The Ag(7)-O(5) bond length is 2.34 Å. The Ag(7)-O(8) bond length is 2.32 Å. In the eighth Ag site, Ag(8) is bonded in a 3-coordinate geometry to one O(1), one O(3), and one O(5) atom. The Ag(8)-O(1) bond length is 2.25 Å. The Ag(8)-O(3) bond length is 2.47 Å. The Ag(8)-O(5) bond length is 2.21 Å. In the ninth Ag site, Ag(9) is bonded in a distorted T-shaped geometry to one O(2), one O(4), and one O(6) atom. The Ag(9)-O(2) bond length is 2.25 Å. The Ag(9)-O(4) bond length is 2.46 Å. The Ag(9)-O(6) bond length is 2.21 Å. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(2), one O(4), one O(5), and one O(7) atom to form SiO4 tetrahedra that share corners with two equivalent Ag(6)O4 trigonal pyramids. The Si(1)-O(2) bond length is 1.66 Å. The Si(1)-O(4) bond length is 1.66 Å. The Si(1)-O(5) bond length is 1.66 Å. The Si(1)-O(7) bond length is 1.67 Å. In the second Si site, Si(2) is bonded to one O(1), one O(3), one O(6), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Ag(6)O4 trigonal pyramid. The Si(2)-O(1) bond length is 1.66 Å. The Si(2)-O(3) bond length is 1.66 Å. The Si(2)-O(6) bond length is 1.66 Å. The Si(2)-O(8) bond length is 1.66 Å. N(1) is bonded in a trigonal planar geometry to one O(10), one O(11), and one O(9) atom. The N(1)-O(10) bond length is 1.27 Å. The N(1)-O(11) bond length is 1.27 Å. The N(1)-O(9) bond length is 1.28 Å. There are eleven inequivalent O sites. In the first O site, O(1) is bonded to one Ag(4), one Ag(7), one Ag(8), and one Si(2) atom to form distorted corner-sharing OSiAg3 tetrahedra. In the second O site, O(2) is bonded to one Ag(3), one Ag(6), one Ag(9), and one Si(1) atom to form distorted corner-sharing OSiAg3 tetrahedra. In the third O site, O(3) is bonded to one Ag(1), one Ag(5), one Ag(8), and one Si(2) atom to form distorted corner-sharing OSiAg3 tetrahedra. In the fourth O site, O(4) is bonded to one Ag(2), one Ag(5), one Ag(9), and one Si(1) atom to form distorted corner-sharing OSiAg3 tetrahedra. In the fifth O site, O(5) is bonded to one Ag(1), one Ag(7), one Ag(8), and one Si(1) atom to form distorted corner-sharing OSiAg3 tetrahedra. In the sixth O site, O(6) is bonded to one Ag(2), one Ag(6), one Ag(9), and one Si(2) atom to form distorted corner-sharing OSiAg3 tetrahedra. In the seventh O site, O(7) is bonded to one Ag(2), one Ag(4), one Ag(6), and one Si(1) atom to form distorted corner-sharing OSiAg3 tetrahedra. In the eighth O site, O(8) is bonded to one Ag(1), one Ag(3), one Ag(7), and one Si(2) atom to form distorted corner-sharing OSiAg3 tetrahedra. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one Ag(3), one Ag(4), and one N(1) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one Ag(3) and one N(1) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to one Ag(2), one Ag(6), and one N(1) atom.