GdH6(C2O)6GdC24H15(NO)6(H3C4N2)3 crystallizes in the cubic P2_13 space group. The structure consists of four gadolinium methacrylate molecules and four H3C4N2 clusters inside a GdC24H15(NO)6 framework. 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 1.42 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 1.39 Å. The C(5)-N(1) bond length is 1.38 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 1.40 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. In the GdC24H15(NO)6 framework, Gd(2) is bonded in a trigonal non-coplanar geometry to three equivalent O(3) atoms. All Gd(2)-O(3) bond lengths are 2.26 Å. There are eight inequivalent C sites. In the first C site, C(9) is bonded in a distorted bent 120 degrees geometry to one C(10), one O(3), and one O(4) atom. The C(9)-C(10) bond length is 1.49 Å. The C(9)-O(3) bond length is 1.27 Å. The C(9)-O(4) bond length is 1.25 Å. In the second C site, C(10) is bonded in a trigonal planar geometry to one C(11), one C(15), and one C(9) atom. The C(10)-C(11) bond length is 1.37 Å. The C(10)-C(15) bond length is 1.38 Å. In the third C site, C(11) is bonded in a single-bond geometry to one C(10) and one H(7) atom. The C(11)-H(7) bond length is 0.95 Å. In the fourth C site, C(12) is bonded in a distorted single-bond geometry to one C(13) and one H(8) atom. The C(12)-C(13) bond length is 1.39 Å. The C(12)-H(8) bond length is 0.95 Å. In the fifth C site, C(13) is bonded in a distorted trigonal planar geometry to one C(12), one C(14), and one N(3) atom. The C(13)-C(14) bond length is 1.40 Å. The C(13)-N(3) bond length is 1.40 Å. In the sixth C site, C(14) is bonded in a distorted single-bond geometry to one C(13), one C(15), and one H(9) atom. The C(14)-C(15) bond length is 1.36 Å. The C(14)-H(9) bond length is 0.95 Å. In the seventh C site, C(15) is bonded in a distorted trigonal planar geometry to one C(10), one C(14), and one H(10) atom. The C(15)-H(10) bond length is 0.95 Å. In the eighth C site, C(16) is bonded in a trigonal planar geometry to one N(3) and two equivalent N(4) atoms. The C(16)-N(3) bond length is 1.33 Å. There is one shorter (1.35 Å) and one longer (1.36 Å) C(16)-N(4) bond length. There are two inequivalent N sites. In the first N site, N(3) is bonded in a distorted trigonal planar geometry to one C(13), one C(16), and one H(6) atom. The N(3)-H(6) bond length is 0.88 Å. In the second N site, N(4) is bonded in a bent 120 degrees geometry to two equivalent C(16) atoms. There are five inequivalent H sites. In the first H site, H(7) is bonded in a single-bond geometry to one C(11) atom. In the second H site, H(8) is bonded in a single-bond geometry to one C(12) atom. In the third H site, H(9) is bonded in a single-bond geometry to one C(14) atom. In the fourth H site, H(6) is bonded in a single-bond geometry to one N(3) atom. In the fifth H site, H(10) is bonded in a single-bond geometry to one C(15) atom. There are two inequivalent O sites. In the first O site, O(3) is bonded in a bent 150 degrees geometry to one Gd(2) and one C(9) atom. In the second O site, O(4) is bonded in a single-bond geometry to one C(9) 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[Gd](O[C]=O)O[C]=O. RCSR code: srs. The MOF has largest included sphere 8.87 A, density 1.00 g/cm3, surface area 4057.52 m2/g, accessible volume 0.74 cm3/g