LiAl3Si9(N7O)2 crystallizes in the triclinic P1 space group. Li(1) is bonded in a 1-coordinate geometry to one N(3), one N(5), and one N(8) atom. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded to one N(4), one N(8), one O(1), and one O(2) atom to form AlN2O2 tetrahedra that share  a cornercorner with one Al(2)N3O tetrahedra,  a cornercorner with one Al(3)N3O tetrahedra,  a cornercorner with one Si(1)N3O tetrahedra,  a cornercorner with one Si(2)N4 tetrahedra,  a cornercorner with one Si(6)N4 tetrahedra,  a cornercorner with one Si(8)N4 tetrahedra, and corners with two equivalent Si(4)N3O tetrahedra. In the second Al site, Al(2) is bonded to one N(12), one N(3), one N(5), and one O(2) atom to form AlN3O tetrahedra that share  a cornercorner with one Al(1)N2O2 tetrahedra,  a cornercorner with one Si(1)N3O tetrahedra,  a cornercorner with one Si(4)N3O tetrahedra,  a cornercorner with one Si(3)N4 tetrahedra,  a cornercorner with one Si(6)N4 tetrahedra,  a cornercorner with one Si(9)N4 tetrahedra, and corners with two equivalent Si(8)N4 tetrahedra. In the third Al site, Al(3) is bonded to one N(11), one N(13), one N(14), and one O(1) atom to form AlN3O tetrahedra that share  a cornercorner with one Al(1)N2O2 tetrahedra,  a cornercorner with one Si(2)N4 tetrahedra,  a cornercorner with one Si(5)N4 tetrahedra,  a cornercorner with one Si(7)N4 tetrahedra,  a cornercorner with one Si(8)N4 tetrahedra,  a cornercorner with one Si(9)N4 tetrahedra, and corners with two equivalent Si(1)N3O tetrahedra. There are nine inequivalent Si sites. In the first Si site, Si(1) is bonded to one N(13), one N(2), one N(3), and one O(1) atom to form SiN3O tetrahedra that share  a cornercorner with one Al(1)N2O2 tetrahedra,  a cornercorner with one Al(2)N3O tetrahedra,  a cornercorner with one Si(2)N4 tetrahedra,  a cornercorner with one Si(3)N4 tetrahedra,  a cornercorner with one Si(7)N4 tetrahedra,  a cornercorner with one Si(9)N4 tetrahedra, and corners with two equivalent Al(3)N3O tetrahedra. In the second Si site, Si(2) is bonded to one N(14), one N(2), one N(4), and one N(6) atom to form SiN4 tetrahedra that share  a cornercorner with one Al(1)N2O2 tetrahedra,  a cornercorner with one Al(3)N3O tetrahedra,  a cornercorner with one Si(1)N3O tetrahedra,  a cornercorner with one Si(3)N4 tetrahedra,  a cornercorner with one Si(5)N4 tetrahedra,  a cornercorner with one Si(6)N4 tetrahedra, and corners with two equivalent Si(9)N4 tetrahedra. In the third Si site, Si(3) is bonded to one N(3), one N(6), one N(7), and one N(9) atom to form SiN4 tetrahedra that share  a cornercorner with one Al(2)N3O tetrahedra,  a cornercorner with one Si(1)N3O tetrahedra,  a cornercorner with one Si(4)N3O tetrahedra,  a cornercorner with one Si(2)N4 tetrahedra,  a cornercorner with one Si(6)N4 tetrahedra,  a cornercorner with one Si(7)N4 tetrahedra, and corners with two equivalent Si(5)N4 tetrahedra. In the fourth Si site, Si(4) is bonded to one N(1), one N(7), one N(8), and one O(2) atom to form SiN3O tetrahedra that share  a cornercorner with one Al(2)N3O tetrahedra,  a cornercorner with one Si(3)N4 tetrahedra,  a cornercorner with one Si(5)N4 tetrahedra,  a cornercorner with one Si(7)N4 tetrahedra,  a cornercorner with one Si(8)N4 tetrahedra,  a cornercorner with one Si(9)N4 tetrahedra, and corners with two equivalent Al(1)N2O2 tetrahedra. In the fifth Si site, Si(5) is bonded to one N(10), one N(11), one N(6), and one N(7) atom to form SiN4 tetrahedra that share  a cornercorner with one Al(3)N3O tetrahedra,  a cornercorner with one Si(4)N3O tetrahedra,  a cornercorner with one Si(2)N4 tetrahedra,  a cornercorner with one Si(6)N4 tetrahedra,  a cornercorner with one Si(7)N4 tetrahedra,  a cornercorner with one Si(8)N4 tetrahedra, and corners with two equivalent Si(3)N4 tetrahedra. In the sixth Si site, Si(6) is bonded to one N(10), one N(4), one N(5), and one N(9) atom to form SiN4 tetrahedra that share  a cornercorner with one Al(1)N2O2 tetrahedra,  a cornercorner with one Al(2)N3O tetrahedra,  a cornercorner with one Si(2)N4 tetrahedra,  a cornercorner with one Si(3)N4 tetrahedra,  a cornercorner with one Si(5)N4 tetrahedra,  a cornercorner with one Si(8)N4 tetrahedra, and corners with two equivalent Si(7)N4 tetrahedra. In the seventh Si site, Si(7) is bonded to one N(1), one N(10), one N(13), and one N(9) atom to form SiN4 tetrahedra that share  a cornercorner with one Al(3)N3O tetrahedra,  a cornercorner with one Si(1)N3O tetrahedra,  a cornercorner with one Si(4)N3O tetrahedra,  a cornercorner with one Si(3)N4 tetrahedra,  a cornercorner with one Si(5)N4 tetrahedra,  a cornercorner with one Si(9)N4 tetrahedra, and corners with two equivalent Si(6)N4 tetrahedra. In the eighth Si site, Si(8) is bonded to one N(11), one N(12), one N(5), and one N(8) atom to form SiN4 tetrahedra that share  a cornercorner with one Al(1)N2O2 tetrahedra,  a cornercorner with one Al(3)N3O tetrahedra,  a cornercorner with one Si(4)N3O tetrahedra,  a cornercorner with one Si(5)N4 tetrahedra,  a cornercorner with one Si(6)N4 tetrahedra,  a cornercorner with one Si(9)N4 tetrahedra, and corners with two equivalent Al(2)N3O tetrahedra. In the ninth Si site, Si(9) is bonded to one N(1), one N(12), one N(14), and one N(2) atom to form SiN4 tetrahedra that share  a cornercorner with one Al(2)N3O tetrahedra,  a cornercorner with one Al(3)N3O tetrahedra,  a cornercorner with one Si(1)N3O tetrahedra,  a cornercorner with one Si(4)N3O tetrahedra,  a cornercorner with one Si(7)N4 tetrahedra,  a cornercorner with one Si(8)N4 tetrahedra, and corners with two equivalent Si(2)N4 tetrahedra. There are fourteen inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Si(4), one Si(7), and one Si(9) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one Si(1), one Si(2), and one Si(9) atom. In the third N site, N(3) is bonded in a tetrahedral geometry to one Li(1), one Al(2), one Si(1), and one Si(3) atom. In the fourth N site, N(4) is bonded in a trigonal planar geometry to one Al(1), one Si(2), and one Si(6) atom. In the fifth N site, N(5) is bonded in a 4-coordinate geometry to one Li(1), one Al(2), one Si(6), and one Si(8) atom. In the sixth N site, N(6) is bonded in a trigonal planar geometry to one Si(2), one Si(3), and one Si(5) atom. In the seventh N site, N(7) is bonded in a trigonal planar geometry to one Si(3), one Si(4), and one Si(5) atom. In the eighth N site, N(8) is bonded in a 4-coordinate geometry to one Li(1), one Al(1), one Si(4), and one Si(8) atom. In the ninth N site, N(9) is bonded in a trigonal planar geometry to one Si(3), one Si(6), and one Si(7) atom. In the tenth N site, N(10) is bonded in a trigonal planar geometry to one Si(5), one Si(6), and one Si(7) atom. In the eleventh N site, N(11) is bonded in a trigonal non-coplanar geometry to one Al(3), one Si(5), and one Si(8) atom. In the twelfth N site, N(12) is bonded in a trigonal planar geometry to one Al(2), one Si(8), and one Si(9) atom. In the thirteenth N site, N(13) is bonded in a trigonal planar geometry to one Al(3), one Si(1), and one Si(7) atom. In the fourteenth N site, N(14) is bonded in a 3-coordinate geometry to one Al(3), one Si(2), and one Si(9) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Al(1), one Al(3), and one Si(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Al(1), one Al(2), and one Si(4) atom.
LiAl3Si9(N7O)2 crystallizes in the triclinic P1 space group. Li(1) is bonded in a 1-coordinate geometry to one N(3), one N(5), and one N(8) atom. The Li(1)-N(3) bond length is 2.08 Å. The Li(1)-N(5) bond length is 2.57 Å. The Li(1)-N(8) bond length is 2.58 Å. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded to one N(4), one N(8), one O(1), and one O(2) atom to form AlN2O2 tetrahedra that share  a cornercorner with one Al(2)N3O tetrahedra,  a cornercorner with one Al(3)N3O tetrahedra,  a cornercorner with one Si(1)N3O tetrahedra,  a cornercorner with one Si(2)N4 tetrahedra,  a cornercorner with one Si(6)N4 tetrahedra,  a cornercorner with one Si(8)N4 tetrahedra, and corners with two equivalent Si(4)N3O tetrahedra. The Al(1)-N(4) bond length is 1.82 Å. The Al(1)-N(8) bond length is 1.83 Å. The Al(1)-O(1) bond length is 1.84 Å. The Al(1)-O(2) bond length is 1.82 Å. In the second Al site, Al(2) is bonded to one N(12), one N(3), one N(5), and one O(2) atom to form AlN3O tetrahedra that share  a cornercorner with one Al(1)N2O2 tetrahedra,  a cornercorner with one Si(1)N3O tetrahedra,  a cornercorner with one Si(4)N3O tetrahedra,  a cornercorner with one Si(3)N4 tetrahedra,  a cornercorner with one Si(6)N4 tetrahedra,  a cornercorner with one Si(9)N4 tetrahedra, and corners with two equivalent Si(8)N4 tetrahedra. The Al(2)-N(12) bond length is 1.82 Å. The Al(2)-N(3) bond length is 1.87 Å. The Al(2)-N(5) bond length is 1.85 Å. The Al(2)-O(2) bond length is 1.88 Å. In the third Al site, Al(3) is bonded to one N(11), one N(13), one N(14), and one O(1) atom to form AlN3O tetrahedra that share  a cornercorner with one Al(1)N2O2 tetrahedra,  a cornercorner with one Si(2)N4 tetrahedra,  a cornercorner with one Si(5)N4 tetrahedra,  a cornercorner with one Si(7)N4 tetrahedra,  a cornercorner with one Si(8)N4 tetrahedra,  a cornercorner with one Si(9)N4 tetrahedra, and corners with two equivalent Si(1)N3O tetrahedra. The Al(3)-N(11) bond length is 1.82 Å. The Al(3)-N(13) bond length is 1.87 Å. The Al(3)-N(14) bond length is 1.85 Å. The Al(3)-O(1) bond length is 1.87 Å. There are nine inequivalent Si sites. In the first Si site, Si(1) is bonded to one N(13), one N(2), one N(3), and one O(1) atom to form SiN3O tetrahedra that share  a cornercorner with one Al(1)N2O2 tetrahedra,  a cornercorner with one Al(2)N3O tetrahedra,  a cornercorner with one Si(2)N4 tetrahedra,  a cornercorner with one Si(3)N4 tetrahedra,  a cornercorner with one Si(7)N4 tetrahedra,  a cornercorner with one Si(9)N4 tetrahedra, and corners with two equivalent Al(3)N3O tetrahedra. The Si(1)-N(13) bond length is 1.72 Å. The Si(1)-N(2) bond length is 1.74 Å. The Si(1)-N(3) bond length is 1.73 Å. The Si(1)-O(1) bond length is 1.74 Å. In the second Si site, Si(2) is bonded to one N(14), one N(2), one N(4), and one N(6) atom to form SiN4 tetrahedra that share  a cornercorner with one Al(1)N2O2 tetrahedra,  a cornercorner with one Al(3)N3O tetrahedra,  a cornercorner with one Si(1)N3O tetrahedra,  a cornercorner with one Si(3)N4 tetrahedra,  a cornercorner with one Si(5)N4 tetrahedra,  a cornercorner with one Si(6)N4 tetrahedra, and corners with two equivalent Si(9)N4 tetrahedra. The Si(2)-N(14) bond length is 1.72 Å. The Si(2)-N(2) bond length is 1.75 Å. The Si(2)-N(4) bond length is 1.73 Å. The Si(2)-N(6) bond length is 1.79 Å. In the third Si site, Si(3) is bonded to one N(3), one N(6), one N(7), and one N(9) atom to form SiN4 tetrahedra that share  a cornercorner with one Al(2)N3O tetrahedra,  a cornercorner with one Si(1)N3O tetrahedra,  a cornercorner with one Si(4)N3O tetrahedra,  a cornercorner with one Si(2)N4 tetrahedra,  a cornercorner with one Si(6)N4 tetrahedra,  a cornercorner with one Si(7)N4 tetrahedra, and corners with two equivalent Si(5)N4 tetrahedra. The Si(3)-N(3) bond length is 1.76 Å. The Si(3)-N(6) bond length is 1.78 Å. The Si(3)-N(7) bond length is 1.78 Å. The Si(3)-N(9) bond length is 1.77 Å. In the fourth Si site, Si(4) is bonded to one N(1), one N(7), one N(8), and one O(2) atom to form SiN3O tetrahedra that share  a cornercorner with one Al(2)N3O tetrahedra,  a cornercorner with one Si(3)N4 tetrahedra,  a cornercorner with one Si(5)N4 tetrahedra,  a cornercorner with one Si(7)N4 tetrahedra,  a cornercorner with one Si(8)N4 tetrahedra,  a cornercorner with one Si(9)N4 tetrahedra, and corners with two equivalent Al(1)N2O2 tetrahedra. The Si(4)-N(1) bond length is 1.73 Å. The Si(4)-N(7) bond length is 1.75 Å. The Si(4)-N(8) bond length is 1.73 Å. The Si(4)-O(2) bond length is 1.71 Å. In the fifth Si site, Si(5) is bonded to one N(10), one N(11), one N(6), and one N(7) atom to form SiN4 tetrahedra that share  a cornercorner with one Al(3)N3O tetrahedra,  a cornercorner with one Si(4)N3O tetrahedra,  a cornercorner with one Si(2)N4 tetrahedra,  a cornercorner with one Si(6)N4 tetrahedra,  a cornercorner with one Si(7)N4 tetrahedra,  a cornercorner with one Si(8)N4 tetrahedra, and corners with two equivalent Si(3)N4 tetrahedra. The Si(5)-N(10) bond length is 1.77 Å. The Si(5)-N(11) bond length is 1.70 Å. The Si(5)-N(6) bond length is 1.78 Å. The Si(5)-N(7) bond length is 1.79 Å. In the sixth Si site, Si(6) is bonded to one N(10), one N(4), one N(5), and one N(9) atom to form SiN4 tetrahedra that share  a cornercorner with one Al(1)N2O2 tetrahedra,  a cornercorner with one Al(2)N3O tetrahedra,  a cornercorner with one Si(2)N4 tetrahedra,  a cornercorner with one Si(3)N4 tetrahedra,  a cornercorner with one Si(5)N4 tetrahedra,  a cornercorner with one Si(8)N4 tetrahedra, and corners with two equivalent Si(7)N4 tetrahedra. The Si(6)-N(10) bond length is 1.77 Å. The Si(6)-N(4) bond length is 1.72 Å. The Si(6)-N(5) bond length is 1.73 Å. The Si(6)-N(9) bond length is 1.78 Å. In the seventh Si site, Si(7) is bonded to one N(1), one N(10), one N(13), and one N(9) atom to form SiN4 tetrahedra that share  a cornercorner with one Al(3)N3O tetrahedra,  a cornercorner with one Si(1)N3O tetrahedra,  a cornercorner with one Si(4)N3O tetrahedra,  a cornercorner with one Si(3)N4 tetrahedra,  a cornercorner with one Si(5)N4 tetrahedra,  a cornercorner with one Si(9)N4 tetrahedra, and corners with two equivalent Si(6)N4 tetrahedra. The Si(7)-N(1) bond length is 1.76 Å. The Si(7)-N(10) bond length is 1.78 Å. The Si(7)-N(13) bond length is 1.73 Å. The Si(7)-N(9) bond length is 1.75 Å. In the eighth Si site, Si(8) is bonded to one N(11), one N(12), one N(5), and one N(8) atom to form SiN4 tetrahedra that share  a cornercorner with one Al(1)N2O2 tetrahedra,  a cornercorner with one Al(3)N3O tetrahedra,  a cornercorner with one Si(4)N3O tetrahedra,  a cornercorner with one Si(5)N4 tetrahedra,  a cornercorner with one Si(6)N4 tetrahedra,  a cornercorner with one Si(9)N4 tetrahedra, and corners with two equivalent Al(2)N3O tetrahedra. The Si(8)-N(11) bond length is 1.72 Å. The Si(8)-N(12) bond length is 1.73 Å. The Si(8)-N(5) bond length is 1.73 Å. The Si(8)-N(8) bond length is 1.76 Å. In the ninth Si site, Si(9) is bonded to one N(1), one N(12), one N(14), and one N(2) atom to form SiN4 tetrahedra that share  a cornercorner with one Al(2)N3O tetrahedra,  a cornercorner with one Al(3)N3O tetrahedra,  a cornercorner with one Si(1)N3O tetrahedra,  a cornercorner with one Si(4)N3O tetrahedra,  a cornercorner with one Si(7)N4 tetrahedra,  a cornercorner with one Si(8)N4 tetrahedra, and corners with two equivalent Si(2)N4 tetrahedra. The Si(9)-N(1) bond length is 1.77 Å. The Si(9)-N(12) bond length is 1.72 Å. The Si(9)-N(14) bond length is 1.75 Å. The Si(9)-N(2) bond length is 1.76 Å. There are fourteen inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Si(4), one Si(7), and one Si(9) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one Si(1), one Si(2), and one Si(9) atom. In the third N site, N(3) is bonded in a tetrahedral geometry to one Li(1), one Al(2), one Si(1), and one Si(3) atom. In the fourth N site, N(4) is bonded in a trigonal planar geometry to one Al(1), one Si(2), and one Si(6) atom. In the fifth N site, N(5) is bonded in a 4-coordinate geometry to one Li(1), one Al(2), one Si(6), and one Si(8) atom. In the sixth N site, N(6) is bonded in a trigonal planar geometry to one Si(2), one Si(3), and one Si(5) atom. In the seventh N site, N(7) is bonded in a trigonal planar geometry to one Si(3), one Si(4), and one Si(5) atom. In the eighth N site, N(8) is bonded in a 4-coordinate geometry to one Li(1), one Al(1), one Si(4), and one Si(8) atom. In the ninth N site, N(9) is bonded in a trigonal planar geometry to one Si(3), one Si(6), and one Si(7) atom. In the tenth N site, N(10) is bonded in a trigonal planar geometry to one Si(5), one Si(6), and one Si(7) atom. In the eleventh N site, N(11) is bonded in a trigonal non-coplanar geometry to one Al(3), one Si(5), and one Si(8) atom. In the twelfth N site, N(12) is bonded in a trigonal planar geometry to one Al(2), one Si(8), and one Si(9) atom. In the thirteenth N site, N(13) is bonded in a trigonal planar geometry to one Al(3), one Si(1), and one Si(7) atom. In the fourteenth N site, N(14) is bonded in a 3-coordinate geometry to one Al(3), one Si(2), and one Si(9) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Al(1), one Al(3), and one Si(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Al(1), one Al(2), and one Si(4) atom.