LaC7NH6O6 crystallizes in the monoclinic P2_1/c space group. La(1) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(6), two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms. The La(1)-O(1) bond length is 2.57 Å. The La(1)-O(2) bond length is 2.49 Å. The La(1)-O(6) bond length is 2.52 Å. There is one shorter (2.55 Å) and one longer (2.57 Å) La(1)-O(3) bond length. There is one shorter (2.50 Å) and one longer (2.64 Å) La(1)-O(4) bond length. There is one shorter (2.58 Å) and one longer (2.62 Å) La(1)-O(5) bond length. There are seven inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one N(1) and one H(1) atom. The C(1)-N(1) bond length is 1.34 Å. The C(1)-H(1) bond length is 1.09 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(3) and one H(2) atom. The C(2)-C(3) bond length is 1.40 Å. The C(2)-H(2) bond length is 1.09 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(2), one C(4), and one C(6) atom. The C(3)-C(4) bond length is 1.40 Å. The C(3)-C(6) bond length is 1.50 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(3), one C(5), and one H(3) atom. The C(4)-C(5) bond length is 1.39 Å. The C(4)-H(3) bond length is 1.08 Å. In the fifth C site, C(5) is bonded in a distorted trigonal planar geometry to one C(4), one N(1), and one H(4) atom. The C(5)-N(1) bond length is 1.34 Å. The C(5)-H(4) bond length is 1.09 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(1), and one O(2) atom. The C(6)-O(1) bond length is 1.28 Å. The C(6)-O(2) bond length is 1.27 Å. In the seventh C site, C(7) is bonded in a trigonal planar geometry to one O(3), one O(4), and one O(5) atom. The C(7)-O(3) bond length is 1.29 Å. The C(7)-O(4) bond length is 1.29 Å. The C(7)-O(5) bond length is 1.30 Å. N(1) is bonded in a trigonal planar geometry to one C(1), one C(5), and one H(5) atom. The N(1)-H(5) bond length is 1.64 Å. There are six inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(4) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(5) atom. In the fifth H site, H(5) is bonded in a distorted linear geometry to one N(1) and one O(6) atom. The H(5)-O(6) bond length is 1.02 Å. In the sixth H site, H(6) is bonded in a single-bond geometry to one O(6) atom. The H(6)-O(6) bond length is 0.99 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one La(1) and one C(6) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one La(1) and one C(6) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to two equivalent La(1) and one C(7) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent La(1) and one C(7) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to two equivalent La(1) and one C(7) atom. In the sixth O site, O(6) is bonded in a water-like geometry to one La(1), one H(5), and one H(6) atom. Linkers: 4 [O]C(=O)c1ccncc1 ,4 [O]C([O])=O. Metal clusters: 4 [La]. RCSR code: hcb. The MOF has largest included sphere 1.80 A, density 2.58 g/cm3, surface area 2478.71 m2/g, accessible volume 0.05 cm3/g