NdC16H6(NO4)2 crystallizes in the cubic Ia-3 space group. There are two inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a cuboctahedral geometry to six equivalent O(1) and six equivalent O(2) atoms. All Nd(1)-O(1) bond lengths are 2.61 Å. All Nd(1)-O(2) bond lengths are 2.63 Å. In the second Nd site, Nd(2) is bonded in a 9-coordinate geometry to three equivalent O(2), three equivalent O(3), and three equivalent O(4) atoms. All Nd(2)-O(2) bond lengths are 2.45 Å. All Nd(2)-O(3) bond lengths are 2.50 Å. All Nd(2)-O(4) bond lengths are 2.49 Å. There are eight inequivalent C sites. In the first C site, C(1) is bonded in a bent 120 degrees geometry to one C(2), one O(1), and one O(2) atom. The C(1)-C(2) bond length is 1.49 Å. The C(1)-O(1) bond length is 1.25 Å. The C(1)-O(2) bond length is 1.27 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(6), and one C(8) atom. The C(2)-C(6) bond length is 1.38 Å. The C(2)-C(8) bond length is 1.38 Å. In the third C site, C(3) is bonded in a bent 120 degrees geometry to one C(4), one O(3), and one O(4) atom. The C(3)-C(4) bond length is 1.49 Å. The C(3)-O(3) bond length is 1.27 Å. The C(3)-O(4) bond length is 1.28 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(3), one C(5), and one C(7) atom. The C(4)-C(5) bond length is 1.38 Å. The C(4)-C(7) bond length is 1.39 Å. In the fifth 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 1.44 Å. In the sixth C site, C(6) is bonded in a distorted single-bond geometry to one C(2), one C(5), and one H(1) atom. The C(6)-H(1) bond length is 0.95 Å. In the seventh C site, C(7) is bonded in a distorted single-bond geometry to one C(4) and one H(2) atom. The C(7)-H(2) bond length is 0.95 Å. In the eighth C site, C(8) is bonded in a distorted single-bond geometry to one C(2) and one H(3) atom. The C(8)-H(3) bond length is 0.95 Å. N(1) is bonded in a single-bond geometry to one C(5) atom. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(6) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(7) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(8) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Nd(1) and one C(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Nd(1), one Nd(2), and one C(1) atom. In the third O site, O(3) is bonded in a distorted L-shaped geometry to one Nd(2) and one C(3) atom. In the fourth O site, O(4) is bonded in a distorted L-shaped geometry to one Nd(2) and one C(3) atom. Linkers: 24 [N]c1cc(C([O])=O)ccc1C([O])=O. Metal clusters: 4 O=[C]O[Nd]12(O[C]=O)(O[C]=O)O[C]O[Nd]34(O[C]O1)(O[C]O2)O[C]O[Nd](O[C]=O)(O[C]=O)(O[C]=O)(O[C]O3)O[C]O4. RCSR code: pcu. The MOF has largest included sphere 9.53 A, density 1.03 g/cm3, surface area 3203.92 m2/g, accessible volume 0.57 cm3/g