CsSrN9 crystallizes in the monoclinic C2/c space group. Cs(1) is bonded in a 10-coordinate geometry to two equivalent N(3), two equivalent N(4), two equivalent N(5), and four equivalent N(1) atoms. Sr(1) is bonded in a 8-coordinate geometry to two equivalent N(1), two equivalent N(3), and four equivalent N(5) atoms. There are five inequivalent N sites. In the first N site, N(1) is bonded in a 2-coordinate geometry to two equivalent Cs(1), one Sr(1), and one N(4) atom. In the second N site, N(2) is bonded in a linear geometry to two equivalent N(3) atoms. In the third N site, N(3) is bonded in a distorted trigonal non-coplanar geometry to one Cs(1), one Sr(1), and one N(2) atom. In the fourth N site, N(4) is bonded in a distorted linear geometry to one Cs(1), one N(1), and one N(5) atom. In the fifth N site, N(5) is bonded in a distorted trigonal planar geometry to one Cs(1), two equivalent Sr(1), and one N(4) atom.
CsSrN9 crystallizes in the monoclinic C2/c space group. Cs(1) is bonded in a 10-coordinate geometry to two equivalent N(3), two equivalent N(4), two equivalent N(5), and four equivalent N(1) atoms. Both Cs(1)-N(3) bond lengths are 3.16 Å. Both Cs(1)-N(4) bond lengths are 3.41 Å. Both Cs(1)-N(5) bond lengths are 3.43 Å. There are two shorter (3.43 Å) and two longer (3.46 Å) Cs(1)-N(1) bond lengths. Sr(1) is bonded in a 8-coordinate geometry to two equivalent N(1), two equivalent N(3), and four equivalent N(5) atoms. Both Sr(1)-N(1) bond lengths are 2.72 Å. Both Sr(1)-N(3) bond lengths are 2.68 Å. There are two shorter (2.79 Å) and two longer (2.81 Å) Sr(1)-N(5) bond lengths. There are five inequivalent N sites. In the first N site, N(1) is bonded in a 2-coordinate geometry to two equivalent Cs(1), one Sr(1), and one N(4) atom. The N(1)-N(4) bond length is 1.18 Å. In the second N site, N(2) is bonded in a linear geometry to two equivalent N(3) atoms. Both N(2)-N(3) bond lengths are 1.18 Å. In the third N site, N(3) is bonded in a distorted trigonal non-coplanar geometry to one Cs(1), one Sr(1), and one N(2) atom. In the fourth N site, N(4) is bonded in a distorted linear geometry to one Cs(1), one N(1), and one N(5) atom. The N(4)-N(5) bond length is 1.19 Å. In the fifth N site, N(5) is bonded in a distorted trigonal planar geometry to one Cs(1), two equivalent Sr(1), and one N(4) atom.