MnH3(CN)7(CH)2 crystallizes in the tetragonal I4_1/a space group. The structure consists of thirty-two 02329_fluka molecules inside a MnH3(CN)7 framework. In the MnH3(CN)7 framework, Mn(1) is bonded in a square pyramidal geometry to one N(1), one N(2), one N(4), one N(5), and one N(6) atom. The Mn(1)-N(1) bond length is 2.30 Å. The Mn(1)-N(2) bond length is 2.31 Å. The Mn(1)-N(4) bond length is 2.22 Å. The Mn(1)-N(5) bond length is 2.24 Å. The Mn(1)-N(6) bond length is 2.21 Å. There are seven inequivalent C sites. In the first C site, C(1) is bonded in a 3-coordinate geometry to one C(2), one N(1), and one H(1) atom. The C(1)-C(2) bond length is 1.37 Å. The C(1)-N(1) bond length is 1.34 Å. The C(1)-H(1) bond length is 0.93 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(1) and one H(2) atom. The C(2)-H(2) bond length is 0.93 Å. In the third C site, C(5) is bonded in a distorted single-bond geometry to one C(6) and one N(1) atom. The C(5)-C(6) bond length is 1.46 Å. The C(5)-N(1) bond length is 1.34 Å. In the fourth C site, C(6) is bonded in a distorted trigonal planar geometry to one C(5), one N(3), and one N(4) atom. The C(6)-N(3) bond length is 1.34 Å. The C(6)-N(4) bond length is 1.35 Å. In the fifth C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(8), one N(2), and one N(4) atom. The C(7)-C(8) bond length is 1.45 Å. The C(7)-N(2) bond length is 1.33 Å. The C(7)-N(4) bond length is 1.35 Å. In the sixth C site, C(8) is bonded in a distorted trigonal planar geometry to one C(7), one N(5), and one N(7) atom. The C(8)-N(5) bond length is 1.33 Å. The C(8)-N(7) bond length is 1.34 Å. In the seventh C site, C(9) is bonded in a trigonal planar geometry to one N(6), one N(7), and one H(5) atom. The C(9)-N(6) bond length is 1.32 Å. The C(9)-N(7) bond length is 1.35 Å. The C(9)-H(5) bond length is 0.93 Å. There are seven inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Mn(1), one C(1), and one C(5) atom. In the second N site, N(2) is bonded in a 3-coordinate geometry to one Mn(1), one C(7), and one N(3) atom. The N(2)-N(3) bond length is 1.37 Å. In the third N site, N(3) is bonded in a distorted water-like geometry to one C(6) and one N(2) atom. In the fourth N site, N(4) is bonded in a distorted trigonal planar geometry to one Mn(1), one C(6), and one C(7) atom. In the fifth N site, N(5) is bonded in a 3-coordinate geometry to one Mn(1), one C(8), and one N(6) atom. The N(5)-N(6) bond length is 1.37 Å. In the sixth N site, N(6) is bonded in a distorted trigonal planar geometry to one Mn(1), one C(9), and one N(5) atom. In the seventh N site, N(7) is bonded in a water-like geometry to one C(8) and one C(9) atom. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(2) atom. In the third H site, H(5) is bonded in a single-bond geometry to one C(9) atom. Linkers: 10 C1=NN=C(C2=NN=C(c3ccccn3)[N]2)[N]1 ,1 C1=NC(C2=NC(c3ccccn3)=N[N]2)=N[N]1 ,1 C1=NC(C2=NN=C(c3ccccn3)[N]2)=N[N]1 ,1 C1=NC(C2=N[N]C(c3ccccn3)=N2)=N[N]1 ,2 C1=NN=C(C2=N[N]C(c3ccccn3)=N2)[N]1 ,1 C1=N[N]C(C2=NN=C(c3ccccn3)[N]2)=N1. Metal clusters: 8 N1=N[Mn]=NN=[Mn]1. The MOF has largest included sphere 8.28 A, density 0.91 g/cm3, surface area 4240.90 m2/g, accessible volume 0.69 cm3/g