NdC12N5HO6 crystallizes in the monoclinic C2/m space group. Nd(1) is bonded in a 9-coordinate geometry to one O(1), one O(4), one O(6), two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms. The Nd(1)-O(1) bond length is 2.50 Å. The Nd(1)-O(4) bond length is 2.48 Å. The Nd(1)-O(6) bond length is 2.51 Å. There is one shorter (2.43 Å) and one longer (2.63 Å) Nd(1)-O(2) bond length. There is one shorter (2.43 Å) and one longer (2.64 Å) Nd(1)-O(3) bond length. There is one shorter (2.42 Å) and one longer (2.98 Å) Nd(1)-O(5) bond length. There are twelve inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(1), and one O(2) atom. The C(1)-C(2) bond length is 1.48 Å. The C(1)-O(1) bond length is 1.24 Å. The C(1)-O(2) bond length is 1.28 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(4) atom. The C(2)-C(3) bond length is 1.39 Å. The C(2)-C(4) bond length is 1.39 Å. In the third C site, C(3) is bonded in a distorted trigonal planar geometry to one C(2), one C(3), and one N(4) atom. The C(3)-C(3) bond length is 1.39 Å. The C(3)-N(4) bond length is 1.43 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(2) and one N(1) atom. The C(4)-N(1) bond length is 1.25 Å. In the fifth C site, C(5) is bonded in a bent 120 degrees geometry to one C(6), one O(3), and one O(4) atom. The C(5)-C(6) bond length is 1.46 Å. The C(5)-O(3) bond length is 1.27 Å. The C(5)-O(4) bond length is 1.25 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one C(5), one C(7), and one C(8) atom. The C(6)-C(7) bond length is 1.40 Å. The C(6)-C(8) bond length is 1.38 Å. In the seventh C site, C(7) is bonded in a distorted trigonal planar geometry to one C(6), one C(8), and one N(3) atom. The C(7)-C(8) bond length is 1.38 Å. The C(7)-N(3) bond length is 1.35 Å. In the eighth C site, C(8) is bonded in a single-bond geometry to one C(6), one C(7), and one H(1) atom. The C(8)-H(1) bond length is 0.93 Å. In the ninth C site, C(9) is bonded in a bent 120 degrees geometry to one C(10), one O(5), and one O(6) atom. The C(9)-C(10) bond length is 1.48 Å. The C(9)-O(5) bond length is 1.24 Å. The C(9)-O(6) bond length is 1.25 Å. In the tenth C site, C(10) is bonded in a trigonal planar geometry to one C(11), one C(12), and one C(9) atom. The C(10)-C(11) bond length is 1.38 Å. The C(10)-C(12) bond length is 1.37 Å. In the eleventh C site, C(11) is bonded in a distorted single-bond geometry to one C(10) and one N(5) atom. The C(11)-N(5) bond length is 1.31 Å. In the twelfth C site, C(12) is bonded in a distorted single-bond geometry to one C(10), one C(12), and one N(2) atom. The C(12)-C(12) bond length is 1.40 Å. The C(12)-N(2) bond length is 1.37 Å. There are five inequivalent N sites. In the first N site, N(1) is bonded in a single-bond geometry to one C(4) atom. In the second N site, N(2) is bonded in a single-bond geometry to one C(12) atom. In the third N site, N(3) is bonded in a single-bond geometry to one C(7) atom. In the fourth N site, N(4) is bonded in a single-bond geometry to one C(3) atom. In the fifth N site, N(5) is bonded in a single-bond geometry to one C(11) atom. H(1) is bonded in a single-bond geometry to one C(8) atom. There are six 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 two equivalent Nd(1) and one C(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Nd(1) and one C(5) atom. In the fourth O site, O(4) is bonded in a distorted water-like geometry to one Nd(1) and one C(5) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to two equivalent Nd(1) and one C(9) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Nd(1) and one C(9) atom. Linkers: 8 [N]c1c([N])c(C([O])=O)c([N])c([N])c1C([O])=O ,4 [N]c1cc(C([O])=O)c([N])cc1C([O])=O. Metal clusters: 8 [Nd]. The MOF has largest included sphere 4.50 A, density 1.95 g/cm3, surface area 2660.58 m2/g, accessible volume 0.16 cm3/g