SmH6(C2O)6(H3C4N2)3 is SC16 CuCl, stable at 5GPa structured and crystallizes in the cubic P2_13 space group. The structure is zero-dimensional and consists of eight 2-methylprop-2-enoic acid;samarium molecules and eight H3C4N2 clusters. In each H3C4N2 cluster, there are four inequivalent C sites. In the first C site, C(4) is bonded in a distorted single-bond geometry to one C(5) and one H(3) atom. The C(4)-C(5) bond length is 1.41 Å. The C(4)-H(3) bond length is 0.95 Å. In the second C site, C(5) is bonded in a distorted trigonal planar geometry to one C(4), one C(6), and one N(1) atom. The C(5)-C(6) bond length is 1.41 Å. The C(5)-N(1) bond length is 1.41 Å. In the third C site, C(6) is bonded in a distorted single-bond geometry to one C(5) and one H(4) atom. The C(6)-H(4) bond length is 0.95 Å. In the fourth C site, C(8) is bonded in a trigonal planar geometry to one N(1) and two equivalent N(2) atoms. The C(8)-N(1) bond length is 1.35 Å. There is one shorter (1.32 Å) and one longer (1.36 Å) C(8)-N(2) bond length. There are two inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal planar geometry to one C(5), one C(8), and one H(1) atom. The N(1)-H(1) bond length is 0.88 Å. In the second N site, N(2) is bonded in a bent 120 degrees geometry to two equivalent C(8) atoms. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one N(1) atom. In the second H site, H(3) is bonded in a single-bond geometry to one C(4) atom. In the third H site, H(4) is bonded in a single-bond geometry to one C(6) atom. Linkers: 8 [O]C(=O)c1ccc(cc1)NC1=NC(=[N]=C([N]1)Nc1ccc(cc1)C(=O)[O])Nc1ccc(cc1)C(=O)[O]. Metal clusters: 8 O=[C]O[Sm](O[C]=O)O[C]=O. RCSR code: srs. The MOF has largest included sphere 8.82 A, density 0.98 g/cm3, surface area 4109.30 m2/g, accessible volume 0.76 cm3/g