CsMnN9 crystallizes in the monoclinic P2_1/c space group. Cs(1) is bonded in a 9-coordinate geometry to one N(1), two equivalent N(3), two equivalent N(4), two equivalent N(6), and two equivalent N(7) atoms. Mn(1) is bonded to one N(4), one N(6), one N(7), one N(9), and two equivalent N(1) atoms to form edge-sharing MnN6 octahedra. There are nine inequivalent N sites. In the first N site, N(7) is bonded in a 4-coordinate geometry to two equivalent Cs(1), one Mn(1), and one N(8) atom. In the second N site, N(8) is bonded in a linear geometry to one N(7) and one N(9) atom. In the third N site, N(1) is bonded in a 4-coordinate geometry to one Cs(1), two equivalent Mn(1), and one N(2) atom. In the fourth N site, N(9) is bonded in a bent 150 degrees geometry to one Mn(1) and one N(8) atom. In the fifth N site, N(2) is bonded in a linear geometry to one N(1) and one N(3) atom. In the sixth N site, N(3) is bonded in a trigonal non-coplanar geometry to two equivalent Cs(1) and one N(2) atom. In the seventh N site, N(4) is bonded in a 4-coordinate geometry to two equivalent Cs(1), one Mn(1), and one N(5) atom. In the eighth N site, N(5) is bonded in a linear geometry to one N(4) and one N(6) atom. In the ninth N site, N(6) is bonded in a 4-coordinate geometry to two equivalent Cs(1), one Mn(1), and one N(5) atom.
CsMnN9 crystallizes in the monoclinic P2_1/c space group. Cs(1) is bonded in a 9-coordinate geometry to one N(1), two equivalent N(3), two equivalent N(4), two equivalent N(6), and two equivalent N(7) atoms. The Cs(1)-N(1) bond length is 3.25 Å. There is one shorter (3.17 Å) and one longer (3.23 Å) Cs(1)-N(3) bond length. There is one shorter (3.33 Å) and one longer (3.51 Å) Cs(1)-N(4) bond length. There is one shorter (3.39 Å) and one longer (3.41 Å) Cs(1)-N(6) bond length. There is one shorter (3.18 Å) and one longer (3.36 Å) Cs(1)-N(7) bond length. Mn(1) is bonded to one N(4), one N(6), one N(7), one N(9), and two equivalent N(1) atoms to form edge-sharing MnN6 octahedra. The Mn(1)-N(4) bond length is 2.22 Å. The Mn(1)-N(6) bond length is 2.21 Å. The Mn(1)-N(7) bond length is 2.19 Å. The Mn(1)-N(9) bond length is 2.18 Å. There is one shorter (2.19 Å) and one longer (2.24 Å) Mn(1)-N(1) bond length. There are nine inequivalent N sites. In the first N site, N(7) is bonded in a 4-coordinate geometry to two equivalent Cs(1), one Mn(1), and one N(8) atom. The N(7)-N(8) bond length is 1.18 Å. In the second N site, N(8) is bonded in a linear geometry to one N(7) and one N(9) atom. The N(8)-N(9) bond length is 1.17 Å. In the third N site, N(1) is bonded in a 4-coordinate geometry to one Cs(1), two equivalent Mn(1), and one N(2) atom. The N(1)-N(2) bond length is 1.20 Å. In the fourth N site, N(9) is bonded in a bent 150 degrees geometry to one Mn(1) and one N(8) atom. In the fifth N site, N(2) is bonded in a linear geometry to one N(1) and one N(3) atom. The N(2)-N(3) bond length is 1.16 Å. In the sixth N site, N(3) is bonded in a trigonal non-coplanar geometry to two equivalent Cs(1) and one N(2) atom. In the seventh N site, N(4) is bonded in a 4-coordinate geometry to two equivalent Cs(1), one Mn(1), and one N(5) atom. The N(4)-N(5) bond length is 1.18 Å. In the eighth N site, N(5) is bonded in a linear geometry to one N(4) and one N(6) atom. The N(5)-N(6) bond length is 1.18 Å. In the ninth N site, N(6) is bonded in a 4-coordinate geometry to two equivalent Cs(1), one Mn(1), and one N(5) atom.