LiH4(CO2)2 crystallizes in the triclinic P-1 space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(1), one O(2), one O(3), and two equivalent O(7) atoms to form distorted LiO5 trigonal bipyramids that share  a cornercorner with one Li(2)O4 tetrahedra and  an edgeedge with one Li(1)O5 trigonal bipyramid. The Li(1)-O(1) bond length is 1.99 Å. The Li(1)-O(2) bond length is 2.21 Å. The Li(1)-O(3) bond length is 2.04 Å. Both Li(1)-O(7) bond lengths are 2.02 Å. In the second Li site, Li(2) is bonded to one O(3), one O(4), one O(5), and one O(8) atom to form corner-sharing LiO4 tetrahedra. The Li(2)-O(3) bond length is 1.97 Å. The Li(2)-O(4) bond length is 1.87 Å. The Li(2)-O(5) bond length is 1.92 Å. The Li(2)-O(8) bond length is 1.99 Å. There are four inequivalent C sites. In the first C site, C(1) is bonded in a distorted water-like geometry to one H(7) and one O(5) atom. The C(1)-H(7) bond length is 1.10 Å. The C(1)-O(5) bond length is 1.41 Å. In the second C site, C(2) is bonded in a distorted water-like geometry to one H(8) and one O(2) atom. The C(2)-H(8) bond length is 1.10 Å. The C(2)-O(2) bond length is 1.43 Å. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one O(4) and one O(7) atom. The C(3)-O(4) bond length is 1.26 Å. The C(3)-O(7) bond length is 1.27 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one O(6) and one O(8) atom. The C(4)-O(6) bond length is 1.28 Å. The C(4)-O(8) bond length is 1.27 Å. There are eight inequivalent H sites. In the first H site, H(1) is bonded in a distorted single-bond geometry to one O(1) and one O(2) atom. The H(1)-O(1) bond length is 1.00 Å. The H(1)-O(2) bond length is 1.68 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(1) atom. The H(2)-O(1) bond length is 1.00 Å. In the third H site, H(3) is bonded in a distorted linear geometry to one O(2) and one O(6) atom. The H(3)-O(2) bond length is 1.02 Å. The H(3)-O(6) bond length is 1.58 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(3) atom. The H(4)-O(3) bond length is 1.00 Å. In the fifth H site, H(5) is bonded in a distorted single-bond geometry to one O(3) and one O(8) atom. The H(5)-O(3) bond length is 1.00 Å. The H(5)-O(8) bond length is 1.68 Å. In the sixth H site, H(6) is bonded in a distorted linear geometry to one O(1) and one O(5) atom. The H(6)-O(1) bond length is 1.62 Å. The H(6)-O(5) bond length is 1.01 Å. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(1) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(2) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted water-like geometry to one Li(1), one H(1), one H(2), and one H(6) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Li(1), one C(2), one H(1), and one H(3) atom. In the third O site, O(3) is bonded in a distorted tetrahedral geometry to one Li(1), one Li(2), one H(4), and one H(5) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Li(2) and one C(3) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Li(2), one C(1), and one H(6) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one C(4) and one H(3) atom. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Li(1) and one C(3) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Li(2), one C(4), and one H(5) atom. Linkers: 1 [O]C(=O)[C@H](O)[C@@H](O)C([O])=O ,1 [O]C(=O)[C@@H](O)[C@H](O)C([O])=O. Metal clusters: 4 [Li]. The MOF has largest included sphere 1.65 A, density 1.73 g/cm3, surface area 3663.47 m2/g, accessible volume 0.08 cm3/g