LaRu2C4P4H18O19H2O crystallizes in the monoclinic Cc space group. The structure consists of four water molecules inside a LaRu2C4P4H18O19 framework. In the LaRu2C4P4H18O19 framework, La(1) is bonded in a 8-coordinate geometry to one O(11), one O(12), one O(17), one O(18), one O(19), one O(20), one O(5), and one O(6) atom. The La(1)-O(11) bond length is 2.42 Å. The La(1)-O(12) bond length is 2.41 Å. The La(1)-O(17) bond length is 2.57 Å. The La(1)-O(18) bond length is 2.56 Å. The La(1)-O(19) bond length is 2.80 Å. The La(1)-O(20) bond length is 2.54 Å. The La(1)-O(5) bond length is 2.41 Å. The La(1)-O(6) bond length is 2.46 Å. There are two inequivalent Ru sites. In the first Ru site, Ru(1) is bonded in a 4-coordinate geometry to one O(1), one O(10), one O(4), and one O(7) atom. The Ru(1)-O(1) bond length is 2.04 Å. The Ru(1)-O(10) bond length is 2.03 Å. The Ru(1)-O(4) bond length is 2.04 Å. The Ru(1)-O(7) bond length is 2.04 Å. In the second Ru site, Ru(2) is bonded in a 5-coordinate geometry to one O(16), one O(2), one O(3), one O(8), and one O(9) atom. The Ru(2)-O(16) bond length is 2.43 Å. The Ru(2)-O(2) bond length is 2.04 Å. The Ru(2)-O(3) bond length is 2.04 Å. The Ru(2)-O(8) bond length is 2.05 Å. The Ru(2)-O(9) bond length is 2.03 Å. There are four inequivalent C sites. In the first C site, C(1) is bonded in a distorted tetrahedral geometry to one C(3), one P(1), one P(3), and one O(13) atom. The C(1)-C(3) bond length is 1.52 Å. The C(1)-P(1) bond length is 1.85 Å. The C(1)-P(3) bond length is 1.85 Å. The C(1)-O(13) bond length is 1.46 Å. In the second C site, C(2) is bonded in a distorted tetrahedral geometry to one C(4), one P(2), one P(4), and one O(14) atom. The C(2)-C(4) bond length is 1.52 Å. The C(2)-P(2) bond length is 1.86 Å. The C(2)-P(4) bond length is 1.85 Å. The C(2)-O(14) bond length is 1.46 Å. In the third C site, C(3) is bonded in a trigonal non-coplanar geometry to one C(1); one H(5); and two equivalent H(1,3) atoms. The C(3)-H(5) bond length is 1.10 Å. Both C(3)-H(1,3) bond lengths are 1.10 Å. In the fourth C site, C(4) is bonded in a trigonal non-coplanar geometry to one C(2), one H(2), one H(4), and one H(6) atom. The C(4)-H(2) bond length is 1.10 Å. The C(4)-H(4) bond length is 1.10 Å. The C(4)-H(6) bond length is 1.10 Å. There are four inequivalent P sites. In the first P site, P(1) is bonded to one C(1), one O(1), one O(3), and one O(5) atom to form corner-sharing PCO3 tetrahedra. The P(1)-O(1) bond length is 1.55 Å. The P(1)-O(3) bond length is 1.58 Å. The P(1)-O(5) bond length is 1.50 Å. In the second P site, P(2) is bonded to one C(2), one O(2), one O(4), and one O(6) atom to form corner-sharing PCO3 tetrahedra. The P(2)-O(2) bond length is 1.55 Å. The P(2)-O(4) bond length is 1.58 Å. The P(2)-O(6) bond length is 1.51 Å. In the third P site, P(3) is bonded to one C(1), one O(11), one O(7), and one O(9) atom to form distorted corner-sharing PCO3 tetrahedra. The P(3)-O(11) bond length is 1.51 Å. The P(3)-O(7) bond length is 1.57 Å. The P(3)-O(9) bond length is 1.56 Å. In the fourth P site, P(4) is bonded to one C(2), one O(10), one O(12), and one O(8) atom to form distorted corner-sharing PCO3 tetrahedra. The P(4)-O(10) bond length is 1.56 Å. The P(4)-O(12) bond length is 1.50 Å. The P(4)-O(8) bond length is 1.57 Å. There are seventeen inequivalent H sites. In the first H site, H(1,3) is bonded in a single-bond geometry to one C(3) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(4) atom. In the third H site, H(4) is bonded in a single-bond geometry to one C(4) atom. In the fourth H site, H(5) is bonded in a single-bond geometry to one C(3) atom. In the fifth H site, H(6) is bonded in a single-bond geometry to one C(4) atom. In the sixth H site, H(7) is bonded in a single-bond geometry to one O(13) atom. The H(7)-O(13) bond length is 0.98 Å. In the seventh H site, H(8) is bonded in a single-bond geometry to one O(14) atom. The H(8)-O(14) bond length is 0.98 Å. In the eighth H site, H(10) is bonded in a single-bond geometry to one O(16) atom. The H(10)-O(16) bond length is 0.98 Å. In the ninth H site, H(11) is bonded in a single-bond geometry to one O(17) and one O(3) atom. The H(11)-O(17) bond length is 0.99 Å. The H(11)-O(3) bond length is 1.73 Å. In the tenth H site, H(12) is bonded in a single-bond geometry to one O(18) and one O(4) atom. The H(12)-O(18) bond length is 0.99 Å. The H(12)-O(4) bond length is 1.75 Å. In the eleventh H site, H(13) is bonded in a single-bond geometry to one O(19) atom. The H(13)-O(19) bond length is 0.99 Å. In the twelfth H site, H(14) is bonded in a single-bond geometry to one O(20) atom. The H(14)-O(20) bond length is 0.98 Å. In the thirteenth H site, H(16) is bonded in a single-bond geometry to one O(16) atom. The H(16)-O(16) bond length is 0.98 Å. In the fourteenth H site, H(17) is bonded in a single-bond geometry to one O(17) atom. The H(17)-O(17) bond length is 0.99 Å. In the fifteenth H site, H(18) is bonded in a single-bond geometry to one O(18) atom. The H(18)-O(18) bond length is 0.99 Å. In the sixteenth H site, H(19) is bonded in a single-bond geometry to one O(19) atom. The H(19)-O(19) bond length is 0.98 Å. In the seventeenth H site, H(20) is bonded in a single-bond geometry to one O(20) atom. The H(20)-O(20) bond length is 0.99 Å. There are nineteen inequivalent O sites. In the first O site, O(3) is bonded in a 3-coordinate geometry to one Ru(2), one P(1), and one H(11) atom. In the second O site, O(4) is bonded in a 3-coordinate geometry to one Ru(1), one P(2), and one H(12) atom. In the third O site, O(5) is bonded in a distorted bent 150 degrees geometry to one La(1) and one P(1) atom. In the fourth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one La(1) and one P(2) atom. In the fifth O site, O(7) is bonded in a bent 120 degrees geometry to one Ru(1) and one P(3) atom. In the sixth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Ru(2) and one P(4) atom. In the seventh O site, O(9) is bonded in a bent 120 degrees geometry to one Ru(2) and one P(3) atom. In the eighth O site, O(10) is bonded in a bent 120 degrees geometry to one Ru(1) and one P(4) atom. In the ninth O site, O(11) is bonded in a distorted single-bond geometry to one La(1) and one P(3) atom. In the tenth O site, O(12) is bonded in a distorted bent 150 degrees geometry to one La(1) and one P(4) atom. In the eleventh O site, O(13) is bonded in a water-like geometry to one C(1) and one H(7) atom. In the twelfth O site, O(14) is bonded in a water-like geometry to one C(2) and one H(8) atom. In the thirteenth O site, O(16) is bonded in a distorted water-like geometry to one Ru(2), one H(10), and one H(16) atom. In the fourteenth O site, O(17) is bonded in a distorted water-like geometry to one La(1), one H(11), and one H(17) atom. In the fifteenth O site, O(18) is bonded in a distorted water-like geometry to one La(1), one H(12), and one H(18) atom. In the sixteenth O site, O(19) is bonded in a water-like geometry to one La(1), one H(13), and one H(19) atom. In the seventeenth O site, O(20) is bonded in a distorted water-like geometry to one La(1), one H(14), and one H(20) atom. In the eighteenth O site, O(1) is bonded in a bent 120 degrees geometry to one Ru(1) and one P(1) atom. In the nineteenth O site, O(2) is bonded in a bent 120 degrees geometry to one Ru(2) and one P(2) atom. Linkers: 4 CC(O)(P([O])([O])=O)P([O])([O])=O. Metal clusters: 2 [La] ,4 [Ru]. The MOF has largest included sphere 3.88 A, density 2.04 g/cm3, surface area 2648.82 m2/g, accessible volume 0.21 cm3/g