LaC18N3H8O8 crystallizes in the monoclinic P2_1/c space group. La(1) is bonded in a 5-coordinate geometry to one O(2), one O(4), one O(5), one O(7), and one O(8) atom. The La(1)-O(2) bond length is 2.68 Å. The La(1)-O(4) bond length is 2.48 Å. The La(1)-O(5) bond length is 2.60 Å. The La(1)-O(7) bond length is 2.50 Å. The La(1)-O(8) bond length is 2.43 Å. There are eighteen inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(15), one O(2), and one O(5) atom. The C(1)-C(15) bond length is 1.51 Å. The C(1)-O(2) bond length is 1.28 Å. The C(1)-O(5) bond length is 1.24 Å. In the second C site, C(2) is bonded in a distorted trigonal planar geometry to one C(11), one C(3), and one N(1) atom. The C(2)-C(11) bond length is 1.40 Å. The C(2)-C(3) bond length is 1.38 Å. The C(2)-N(1) bond length is 1.46 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(2), one C(5), and one H(2) atom. The C(3)-C(5) bond length is 1.39 Å. The C(3)-H(2) bond length is 0.93 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one C(5), one O(4), and one O(8) atom. The C(4)-C(5) bond length is 1.51 Å. The C(4)-O(4) bond length is 1.25 Å. The C(4)-O(8) bond length is 1.25 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(13), one C(3), and one C(4) atom. The C(5)-C(13) bond length is 1.40 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one C(10), one C(11), and one C(13) atom. The C(6)-C(10) bond length is 1.50 Å. The C(6)-C(11) bond length is 1.39 Å. The C(6)-C(13) bond length is 1.39 Å. In the seventh C site, C(7) is bonded in a distorted trigonal planar geometry to one C(14), one C(8), and one N(3) atom. The C(7)-C(14) bond length is 1.37 Å. The C(7)-C(8) bond length is 1.45 Å. The C(7)-N(3) bond length is 1.35 Å. In the eighth C site, C(8) is bonded in a trigonal planar geometry to one C(16), one C(7), and one C(9) atom. The C(8)-C(16) bond length is 1.39 Å. The C(8)-C(9) bond length is 1.39 Å. In the ninth C site, C(9) is bonded in a distorted single-bond geometry to one C(15), one C(8), and one H(3) atom. The C(9)-C(15) bond length is 1.39 Å. The C(9)-H(3) bond length is 0.93 Å. In the tenth C site, C(10) is bonded in a distorted bent 120 degrees geometry to one C(6), one O(3), and one O(6) atom. The C(10)-O(3) bond length is 1.30 Å. The C(10)-O(6) bond length is 1.21 Å. In the eleventh C site, C(11) is bonded in a distorted single-bond geometry to one C(2), one C(6), and one H(4) atom. The C(11)-H(4) bond length is 0.93 Å. In the twelfth C site, C(12) is bonded in a distorted bent 120 degrees geometry to one C(18), one O(1), and one O(7) atom. The C(12)-C(18) bond length is 1.51 Å. The C(12)-O(1) bond length is 1.25 Å. The C(12)-O(7) bond length is 1.26 Å. In the thirteenth C site, C(13) is bonded in a distorted single-bond geometry to one C(5), one C(6), and one H(5) atom. The C(13)-H(5) bond length is 0.93 Å. In the fourteenth C site, C(14) is bonded in a 3-coordinate geometry to one C(7), one N(1), and one H(6) atom. The C(14)-N(1) bond length is 1.36 Å. The C(14)-H(6) bond length is 0.93 Å. In the fifteenth C site, C(15) is bonded in a trigonal planar geometry to one C(1), one C(17), and one C(9) atom. The C(15)-C(17) bond length is 1.39 Å. In the sixteenth C site, C(16) is bonded in a distorted single-bond geometry to one C(18), one C(8), and one H(7) atom. The C(16)-C(18) bond length is 1.40 Å. The C(16)-H(7) bond length is 0.93 Å. In the seventeenth C site, C(17) is bonded in a distorted single-bond geometry to one C(15), one C(18), and one H(8) atom. The C(17)-C(18) bond length is 1.39 Å. The C(17)-H(8) bond length is 0.93 Å. In the eighteenth C site, C(18) is bonded in a trigonal planar geometry to one C(12), one C(16), and one C(17) atom. There are three inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal planar geometry to one C(14), one C(2), and one N(2) atom. The N(1)-N(2) bond length is 1.35 Å. In the second N site, N(2) is bonded in a water-like geometry to one N(1) and one N(3) atom. The N(2)-N(3) bond length is 1.32 Å. In the third N site, N(3) is bonded in a distorted single-bond geometry to one C(7) and one N(2) atom. There are eight inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(1) and one O(3) atom. The H(1)-O(1) bond length is 1.70 Å. The H(1)-O(3) bond length is 0.87 Å. In the second H site, H(2) is bonded in a single-bond geometry to one C(3) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(9) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(11) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(13) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(14) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(16) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(17) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one C(12) and one H(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one La(1) and one C(1) atom. In the third O site, O(3) is bonded in a water-like geometry to one C(10) and one H(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one La(1) and one C(4) atom. In the fifth O site, O(5) is bonded in a single-bond geometry to one La(1) and one C(1) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one C(10) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one La(1) and one C(12) atom. In the eighth O site, O(8) is bonded in a distorted bent 150 degrees geometry to one La(1) and one C(4) atom. Linkers: 3 [O]C(=O)c1cc(C([O])=O)cc(-c2cn(-c3cc(C([O])=O)cc(C(=O)O)c3)nn2)c1 ,2 [O]C(=O)c1cc(C(=O)O)cc(-n2cc(-c3c[c][c]c([C]=O)c3)nn2)c1 ,1 [O]C(=O)c1cc([C]=O)cc(-c2cn(-c3cc(C([O])=O)cc(C(=O)O)c3)nn2)c1 ,1 [C][CH]/C(=C\[C][C]=O)n1cc(-c2cc(C([O])=O)cc(C([O])=O)c2)nn1 ,1 [C]/C=C(\C=[C]\[C]=O)n1cc(-c2cc(C([O])=O)cc(C([O])=O)c2)nn1. Metal clusters: 2 O=[C]O[La]12(O[C]O1)O[C]O[La]1(O[C]=O)(O[C]O1)O[C]O2. The MOF has largest included sphere 4.47 A, density 1.59 g/cm3, surface area 3690.32 m2/g, accessible volume 0.23 cm3/g