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(2), one N(3), one N(4), one N(6), and one N(7) atom. The Mn(1)-N(2) bond length is 2.24 Å. The Mn(1)-N(3) bond length is 2.22 Å. The Mn(1)-N(4) bond length is 2.21 Å. The Mn(1)-N(6) bond length is 2.30 Å. The Mn(1)-N(7) bond length is 2.32 Å. There are seven inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one N(1), one N(3), and one H(1) atom. The C(1)-N(1) bond length is 1.35 Å. The C(1)-N(3) bond length is 1.33 Å. The C(1)-H(1) bond length is 0.93 Å. In the second C site, C(2) is bonded in a distorted trigonal planar geometry to one C(3), one N(1), and one N(2) atom. The C(2)-C(3) bond length is 1.45 Å. The C(2)-N(1) bond length is 1.34 Å. The C(2)-N(2) bond length is 1.33 Å. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one C(2), one N(4), and one N(6) atom. The C(3)-N(4) bond length is 1.35 Å. The C(3)-N(6) bond length is 1.33 Å. In the fourth C site, C(4) is bonded in a 3-coordinate geometry to one C(5), one N(4), and one N(5) atom. The C(4)-C(5) bond length is 1.47 Å. The C(4)-N(4) bond length is 1.37 Å. The C(4)-N(5) bond length is 1.32 Å. In the fifth C site, C(5) is bonded in a distorted single-bond geometry to one C(4) and one N(7) atom. The C(5)-N(7) bond length is 1.34 Å. In the sixth C site, C(8) is bonded in a distorted single-bond geometry to one C(9) and one H(4) atom. The C(8)-C(9) bond length is 1.37 Å. The C(8)-H(4) bond length is 0.93 Å. In the seventh C site, C(9) is bonded in a 3-coordinate geometry to one C(8), one N(7), and one H(5) atom. 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 water-like geometry to one C(1) and one C(2) atom. In the second N site, N(2) is bonded in a 3-coordinate geometry to one Mn(1), one C(2), 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 trigonal planar geometry to one Mn(1), one C(1), 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(3), and one C(4) atom. In the fifth N site, N(5) is bonded in a distorted water-like geometry to one C(4) and one N(6) atom. The N(5)-N(6) bond length is 1.38 Å. In the sixth N site, N(6) is bonded in a 3-coordinate geometry to one Mn(1), one C(3), and one N(5) atom. In the seventh N site, N(7) is bonded in a trigonal planar geometry to one Mn(1), one C(5), 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(4) is bonded in a single-bond geometry to one C(8) atom. In the third H site, H(5) is bonded in a single-bond geometry to one C(9) atom. Linkers: 5 c1ccc(nc1)C1=[N]=C(N=N1)C1=[N]=CN=N1 ,1 c1ccc(nc1)C1=[N]=C(N=N1)C1=N[N]C=N1 ,1 c1ccc(nc1)C1=NC(=N[N]1)C1=[N]=CN=N1 ,1 c1ccc(nc1)C1=[N]=C(N=N1)C1=NN=C[N]1. Metal clusters: 4 N1=N[Mn]=NN=[Mn]1. The MOF has largest included sphere 8.13 A, density 0.91 g/cm3, surface area 4286.76 m2/g, accessible volume 0.72 cm3/g