LaCuC6PNH6O9 crystallizes in the monoclinic P2_1/c space group. La(1) is bonded in a 7-coordinate geometry to one O(2), one O(3), one O(4), one O(5), one O(7), one O(8), and one O(9) atom. The La(1)-O(2) bond length is 2.54 Å. The La(1)-O(3) bond length is 2.64 Å. The La(1)-O(4) bond length is 2.77 Å. The La(1)-O(5) bond length is 2.47 Å. The La(1)-O(7) bond length is 2.45 Å. The La(1)-O(8) bond length is 2.56 Å. The La(1)-O(9) bond length is 2.53 Å. Cu(1) is bonded to one N(1), one O(1), one O(3), one O(6), and one O(7) atom to form CuNO4 square pyramids that share  a cornercorner with one C(5)PH2N tetrahedra and corners with two equivalent P(1)CO3 tetrahedra. The Cu(1)-N(1) bond length is 2.02 Å. The Cu(1)-O(1) bond length is 1.95 Å. The Cu(1)-O(3) bond length is 1.96 Å. The Cu(1)-O(6) bond length is 1.93 Å. The Cu(1)-O(7) bond length is 2.53 Å. There are six 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(2) atom. The C(1)-O(1) bond length is 1.28 Å. The C(1)-O(2) bond length is 1.25 Å. In the second C site, C(2) is bonded in a 3-coordinate geometry to one N(1) and two equivalent H(1,2) atoms. The C(2)-N(1) bond length is 1.49 Å. Both C(2)-H(1,2) bond lengths are 0.99 Å. In the third C site, C(3) is bonded in a 3-coordinate geometry to one C(4); one N(1); and two equivalent H(3,4) atoms. The C(3)-C(4) bond length is 1.52 Å. The C(3)-N(1) bond length is 1.49 Å. Both C(3)-H(3,4) bond lengths are 0.99 Å. In the fourth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(3), one O(3), and one O(4) atom. The C(4)-O(3) bond length is 1.29 Å. The C(4)-O(4) bond length is 1.23 Å. In the fifth C site, C(5) is bonded to one P(1); one N(1); and two equivalent H(5,6) atoms to form distorted CPH2N tetrahedra that share  a cornercorner with one Cu(1)NO4 square pyramid. The C(5)-P(1) bond length is 1.81 Å. The C(5)-N(1) bond length is 1.49 Å. Both C(5)-H(5,6) bond lengths are 0.99 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one O(8) and one O(9) atom. The C(6)-O(8) bond length is 1.26 Å. The C(6)-O(9) bond length is 1.25 Å. P(1) is bonded to one C(5), one O(5), one O(6), and one O(7) atom to form PCO3 tetrahedra that share corners with two equivalent Cu(1)NO4 square pyramids and  a cornercorner with one N(1)CuC3 tetrahedra. The P(1)-O(5) bond length is 1.52 Å. The P(1)-O(6) bond length is 1.55 Å. The P(1)-O(7) bond length is 1.52 Å. N(1) is bonded to one Cu(1), one C(2), one C(3), and one C(5) atom to form NCuC3 tetrahedra that share  a cornercorner with one P(1)CO3 tetrahedra. There are three inequivalent H sites. In the first H site, H(1,2) is bonded in a single-bond geometry to one C(2) atom. In the second H site, H(3,4) is bonded in a single-bond geometry to one C(3) atom. In the third H site, H(5,6) is bonded in a single-bond geometry to one C(5) atom. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Cu(1) and one C(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one La(1) and one C(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one La(1), one Cu(1), and one C(4) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one La(1) and one C(4) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one La(1) and one P(1) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Cu(1) and one P(1) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one La(1), one Cu(1), and one P(1) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one La(1) and one C(6) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one La(1) and one C(6) atom. Linkers: 2 [O]C(=O)C([O])=O. Metal clusters: 4 [La] ,4 [Cu]. The MOF has largest included sphere 4.32 A, density 2.04 g/cm3, surface area 2579.14 m2/g, accessible volume 0.24 cm3/g