Gd3Mn2C16(N12O)4 crystallizes in the cubic Pn-3n space group. Gd(1) is bonded in a 8-coordinate geometry to four equivalent N(3) and four equivalent O(1) atoms. All Gd(1)-N(3) bond lengths are 2.51 Å. All Gd(1)-O(1) bond lengths are 2.50 Å. Mn(1) is bonded in an octahedral geometry to six equivalent N(4) atoms. All Mn(1)-N(4) bond lengths are 2.27 Å. There are two inequivalent C sites. In the first C site, C(2) is bonded in a distorted single-bond geometry to three equivalent C(1) and one O(1) atom. All C(2)-C(1) bond lengths are 1.51 Å. The C(2)-O(1) bond length is 1.39 Å. In the second C site, C(1) is bonded in a distorted trigonal planar geometry to one C(2), one N(3), and one N(4) atom. The C(1)-N(3) bond length is 1.33 Å. The C(1)-N(4) bond length is 1.31 Å. There are four inequivalent N sites. In the first N site, N(1) is bonded in a water-like geometry to one N(2) and one N(3) atom. The N(1)-N(2) bond length is 1.32 Å. The N(1)-N(3) bond length is 1.36 Å. In the second N site, N(2) is bonded in a water-like geometry to one N(1) and one N(4) atom. The N(2)-N(4) bond length is 1.35 Å. In the third N site, N(3) is bonded in a distorted single-bond geometry to one Gd(1), one C(1), and one N(1) atom. In the fourth N site, N(4) is bonded in a 3-coordinate geometry to one Mn(1), one C(1), and one N(2) atom. O(1) is bonded in a distorted single-bond geometry to three equivalent Gd(1) and one C(2) atom. Linkers: 5 [O]C(C1=N[N]N=N1)(C1=N[N]N=N1)C1=N[N]N=N1 ,6 [O]C(C1=NN=N[N]1)(C1=N[N]N=N1)C1=N[N]N=N1 ,1 [O]C(C1=NN=N[N]1)(C1=NN=N[N]1)C1=N[N]N=N1. Metal clusters: 12 [Gd] ,8 [Mn]. The MOF has largest included sphere 5.07 A, density 2.00 g/cm3, surface area 2179.17 m2/g, accessible volume 0.17 cm3/g