Li9Ag4 is gamma-brass-like structured and crystallizes in the orthorhombic Fmm2 space group. There are seven inequivalent Li sites. In the first Li site, Li(1) is bonded in a 5-coordinate geometry to one Li(3), two equivalent Li(4), one Ag(3), two equivalent Ag(1), and two equivalent Ag(2) atoms. In the second Li site, Li(2) is bonded in a 4-coordinate geometry to one Li(5), two equivalent Li(6), one Ag(1), one Ag(4), and two equivalent Ag(2) atoms. In the third Li site, Li(3) is bonded in a 11-coordinate geometry to one Li(1), two equivalent Li(4), two equivalent Li(6), two equivalent Li(7), one Ag(3), one Ag(4), and two equivalent Ag(2) atoms. In the fourth Li site, Li(4) is bonded in a 11-coordinate geometry to one Li(1), one Li(3), one Li(5), one Li(7), two equivalent Li(6), one Ag(1), one Ag(3), and three equivalent Ag(2) atoms. In the fifth Li site, Li(5) is bonded in a 11-coordinate geometry to one Li(2), two equivalent Li(4), two equivalent Li(6), one Ag(3), one Ag(4), two equivalent Ag(1), and two equivalent Ag(2) atoms. In the sixth Li site, Li(6) is bonded in a 11-coordinate geometry to one Li(2), one Li(3), one Li(5), one Li(7), two equivalent Li(4), one Ag(1), one Ag(4), and three equivalent Ag(2) atoms. In the seventh Li site, Li(7) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Li(3), two equivalent Li(4), two equivalent Li(6), one Ag(4), and two equivalent Ag(2) atoms. There are four inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 9-coordinate geometry to one Li(2), two equivalent Li(1), two equivalent Li(4), two equivalent Li(5), two equivalent Li(6), one Ag(3), and two equivalent Ag(2) atoms. In the second Ag site, Ag(2) is bonded in a 13-coordinate geometry to one Li(1), one Li(2), one Li(3), one Li(5), one Li(7), three equivalent Li(4), three equivalent Li(6), one Ag(1), and one Ag(2) atom. In the third Ag site, Ag(3) is bonded in a 13-coordinate geometry to two equivalent Li(1), two equivalent Li(3), two equivalent Li(5), four equivalent Li(4), one Ag(4), and two equivalent Ag(1) atoms. In the fourth Ag site, Ag(4) is bonded in a 13-coordinate geometry to two equivalent Li(2), two equivalent Li(3), two equivalent Li(5), two equivalent Li(7), four equivalent Li(6), and one Ag(3) atom.
Li9Ag4 is gamma-brass-like structured and crystallizes in the orthorhombic Fmm2 space group. There are seven inequivalent Li sites. In the first Li site, Li(1) is bonded in a 5-coordinate geometry to one Li(3), two equivalent Li(4), one Ag(3), two equivalent Ag(1), and two equivalent Ag(2) atoms. The Li(1)-Li(3) bond length is 2.97 Å. Both Li(1)-Li(4) bond lengths are 2.86 Å. The Li(1)-Ag(3) bond length is 2.77 Å. Both Li(1)-Ag(1) bond lengths are 2.82 Å. Both Li(1)-Ag(2) bond lengths are 2.79 Å. In the second Li site, Li(2) is bonded in a 4-coordinate geometry to one Li(5), two equivalent Li(6), one Ag(1), one Ag(4), and two equivalent Ag(2) atoms. The Li(2)-Li(5) bond length is 2.76 Å. Both Li(2)-Li(6) bond lengths are 2.87 Å. The Li(2)-Ag(1) bond length is 2.80 Å. The Li(2)-Ag(4) bond length is 2.78 Å. Both Li(2)-Ag(2) bond lengths are 2.77 Å. In the third Li site, Li(3) is bonded in a 11-coordinate geometry to one Li(1), two equivalent Li(4), two equivalent Li(6), two equivalent Li(7), one Ag(3), one Ag(4), and two equivalent Ag(2) atoms. Both Li(3)-Li(4) bond lengths are 2.88 Å. Both Li(3)-Li(6) bond lengths are 2.87 Å. There is one shorter (2.81 Å) and one longer (2.95 Å) Li(3)-Li(7) bond length. The Li(3)-Ag(3) bond length is 3.00 Å. The Li(3)-Ag(4) bond length is 2.79 Å. Both Li(3)-Ag(2) bond lengths are 3.03 Å. In the fourth Li site, Li(4) is bonded in a 11-coordinate geometry to one Li(1), one Li(3), one Li(5), one Li(7), two equivalent Li(6), one Ag(1), one Ag(3), and three equivalent Ag(2) atoms. The Li(4)-Li(5) bond length is 2.82 Å. The Li(4)-Li(7) bond length is 3.00 Å. There is one shorter (2.77 Å) and one longer (2.94 Å) Li(4)-Li(6) bond length. The Li(4)-Ag(1) bond length is 2.75 Å. The Li(4)-Ag(3) bond length is 3.11 Å. There are a spread of Li(4)-Ag(2) bond distances ranging from 2.73-3.08 Å. In the fifth Li site, Li(5) is bonded in a 11-coordinate geometry to one Li(2), two equivalent Li(4), two equivalent Li(6), one Ag(3), one Ag(4), two equivalent Ag(1), and two equivalent Ag(2) atoms. Both Li(5)-Li(6) bond lengths are 2.82 Å. The Li(5)-Ag(3) bond length is 2.72 Å. The Li(5)-Ag(4) bond length is 3.11 Å. There is one shorter (2.77 Å) and one longer (2.86 Å) Li(5)-Ag(1) bond length. Both Li(5)-Ag(2) bond lengths are 3.15 Å. In the sixth Li site, Li(6) is bonded in a 11-coordinate geometry to one Li(2), one Li(3), one Li(5), one Li(7), two equivalent Li(4), one Ag(1), one Ag(4), and three equivalent Ag(2) atoms. The Li(6)-Li(7) bond length is 2.84 Å. The Li(6)-Ag(1) bond length is 2.81 Å. The Li(6)-Ag(4) bond length is 3.07 Å. There are a spread of Li(6)-Ag(2) bond distances ranging from 2.77-3.10 Å. In the seventh Li site, Li(7) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Li(3), two equivalent Li(4), two equivalent Li(6), one Ag(4), and two equivalent Ag(2) atoms. The Li(7)-Ag(4) bond length is 2.85 Å. Both Li(7)-Ag(2) bond lengths are 2.83 Å. There are four inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 9-coordinate geometry to one Li(2), two equivalent Li(1), two equivalent Li(4), two equivalent Li(5), two equivalent Li(6), one Ag(3), and two equivalent Ag(2) atoms. The Ag(1)-Ag(3) bond length is 2.96 Å. Both Ag(1)-Ag(2) bond lengths are 2.97 Å. In the second Ag site, Ag(2) is bonded in a 13-coordinate geometry to one Li(1), one Li(2), one Li(3), one Li(5), one Li(7), three equivalent Li(4), three equivalent Li(6), one Ag(1), and one Ag(2) atom. The Ag(2)-Ag(2) bond length is 2.87 Å. In the third Ag site, Ag(3) is bonded in a 13-coordinate geometry to two equivalent Li(1), two equivalent Li(3), two equivalent Li(5), four equivalent Li(4), one Ag(4), and two equivalent Ag(1) atoms. The Ag(3)-Ag(4) bond length is 2.85 Å. In the fourth Ag site, Ag(4) is bonded in a 13-coordinate geometry to two equivalent Li(2), two equivalent Li(3), two equivalent Li(5), two equivalent Li(7), four equivalent Li(6), and one Ag(3) atom.