Li2C7NH3O4 crystallizes in the orthorhombic Pbcn space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded in a trigonal non-coplanar geometry to one O(1), one O(2), and one O(3) atom. The Li(1)-O(1) bond length is 1.96 Å. The Li(1)-O(2) bond length is 1.89 Å. The Li(1)-O(3) bond length is 1.98 Å. In the second Li site, Li(2) is bonded in a 4-coordinate geometry to one N(1), one O(1), and two equivalent O(4) atoms. The Li(2)-N(1) bond length is 2.08 Å. The Li(2)-O(1) bond length is 1.91 Å. There is one shorter (1.90 Å) and one longer (1.94 Å) Li(2)-O(4) 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 C(4), one O(1), and one O(2) atom. The C(1)-C(4) bond length is 1.52 Å. The C(1)-O(1) bond length is 1.26 Å. The C(1)-O(2) bond length is 1.24 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(3), and one O(4) atom. The C(2)-C(3) bond length is 1.51 Å. The C(2)-O(3) bond length is 1.23 Å. The C(2)-O(4) bond length is 1.27 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(2), one C(6), and one C(7) atom. The C(3)-C(6) bond length is 1.39 Å. The C(3)-C(7) bond length is 1.38 Å. In the fourth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(1), one C(5), and one N(1) atom. The C(4)-C(5) bond length is 1.38 Å. The C(4)-N(1) bond length is 1.34 Å. In the fifth C site, C(5) is bonded in a distorted single-bond geometry to one C(4) and one H(1) atom. The C(5)-H(1) bond length is 0.93 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(3), one N(1), and one H(2) atom. The C(6)-N(1) bond length is 1.34 Å. The C(6)-H(2) bond length is 0.93 Å. In the seventh C site, C(7) is bonded in a distorted single-bond geometry to one C(3) and one H(3) atom. The C(7)-H(3) bond length is 0.93 Å. N(1) is bonded in a trigonal planar geometry to one Li(2), one C(4), and one C(6) atom. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(5) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(6) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(7) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Li(1), one Li(2), and one C(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Li(1) and one C(1) atom. In the third O site, O(4) is bonded in a distorted T-shaped geometry to two equivalent Li(2) and one C(2) atom. In the fourth O site, O(3) is bonded in a bent 120 degrees geometry to one Li(1) and one C(2) atom. Linkers: 8 [O]C(=O)c1ccc(C([O])=O)nc1. Metal clusters: 16 [Li]. The MOF has largest included sphere 5.25 A, density 0.95 g/cm3, surface area 4670.42 m2/g, accessible volume 0.53 cm3/g