La(CO2)3 crystallizes in the monoclinic P2/c space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(2) atoms. Both La(1)-O(1) bond lengths are 2.55 Å. There are two shorter (2.62 Å) and two longer (2.63 Å) La(1)-O(2) bond lengths. In the second La site, La(2) is bonded in a 8-coordinate geometry to two equivalent O(3), two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms. Both La(2)-O(3) bond lengths are 2.64 Å. Both La(2)-O(4) bond lengths are 2.52 Å. Both La(2)-O(5) bond lengths are 2.52 Å. Both La(2)-O(6) bond lengths are 2.53 Å. There are three inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(3) atom. The C(1)-O(1) bond length is 1.26 Å. The C(1)-O(3) bond length is 1.25 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one O(2) and one O(4) atom. The C(2)-O(2) bond length is 1.26 Å. The C(2)-O(4) bond length is 1.24 Å. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one O(5) and one O(6) atom. The C(3)-O(5) bond length is 1.26 Å. The C(3)-O(6) bond length is 1.25 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one La(1) and one C(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent La(1) and one C(2) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one La(2) and one C(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one La(2) and one C(2) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one La(2) and one C(3) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one La(2) and one C(3) atom. Linkers: 5 [O]C(=O)C([O])=O. Metal clusters: 4 [La]. The MOF has largest included sphere 5.14 A, density 2.06 g/cm3, surface area 2369.10 m2/g, accessible volume 0.22 cm3/g