NdH3(C3O2)3 crystallizes in the tetragonal P4_322 space group. Nd(1) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Both Nd(1)-O(1) bond lengths are 2.40 Å. Both Nd(1)-O(2) bond lengths are 2.44 Å. Both Nd(1)-O(3) bond lengths are 2.36 Å. There are six inequivalent C sites. In the first C site, C(3) is bonded in a single-bond geometry to two equivalent C(2) and one H(1) atom. Both C(3)-C(2) bond lengths are 1.40 Å. The C(3)-H(1) bond length is 1.09 Å. In the second C site, C(4) is bonded in a distorted trigonal planar geometry to one C(2), one C(5), and one H(2) atom. The C(4)-C(2) bond length is 1.40 Å. The C(4)-C(5) bond length is 1.40 Å. The C(4)-H(2) bond length is 1.09 Å. In the third C site, C(5) is bonded in a trigonal planar geometry to one C(6) and two equivalent C(4) atoms. The C(5)-C(6) bond length is 1.50 Å. In the fourth 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 1.29 Å. The C(1)-O(2) bond length is 1.27 Å. In the fifth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(5) and two equivalent O(3) atoms. Both C(6)-O(3) bond lengths are 1.27 Å. In the sixth C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(4) atom. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(3) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(4) atom. There are three inequivalent O sites. In the first O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Nd(1) and one C(6) atom. In the second O site, O(1) is bonded in a 2-coordinate geometry to one Nd(1) and one C(1) atom. In the third O site, O(2) is bonded in a water-like geometry to one Nd(1) and one C(1) atom. Linkers: 4 [O]C(=O)c1cc(C([O])=O)cc(C([O])=O)c1. Metal clusters: 4 [Nd]. The MOF has largest included sphere 7.14 A, density 1.51 g/cm3, surface area 2533.01 m2/g, accessible volume 0.35 cm3/g