K3CdC14N3H18O10 crystallizes in the triclinic P-1 space group. There are three inequivalent K sites. In the first K site, K(1) is bonded to one O(1), one O(2), one O(6), and two equivalent O(8) atoms to form KO5 trigonal bipyramids that share  a cornercorner with one Cd(1)N3O4 pentagonal bipyramid and  an edgeedge with one K(1)O5 trigonal bipyramid. The K(1)-O(1) bond length is 2.76 Å. The K(1)-O(2) bond length is 2.83 Å. The K(1)-O(6) bond length is 2.67 Å. There is one shorter (2.65 Å) and one longer (2.67 Å) K(1)-O(8) bond length. In the second K site, K(2) is bonded in a 5-coordinate geometry to one O(2), one O(5), one O(7), and two equivalent O(6) atoms. The K(2)-O(2) bond length is 2.63 Å. The K(2)-O(5) bond length is 2.87 Å. The K(2)-O(7) bond length is 2.69 Å. There is one shorter (2.66 Å) and one longer (2.83 Å) K(2)-O(6) bond length. In the third K site, K(3) is bonded in a 7-coordinate geometry to one H(5), one H(9), one O(10), one O(3), one O(9), and two equivalent O(4) atoms. The K(3)-H(5) bond length is 2.75 Å. The K(3)-H(9) bond length is 2.90 Å. The K(3)-O(10) bond length is 2.62 Å. The K(3)-O(3) bond length is 2.67 Å. The K(3)-O(9) bond length is 3.00 Å. There is one shorter (2.67 Å) and one longer (2.83 Å) K(3)-O(4) bond length. Cd(1) is bonded to one N(1), one N(2), one N(3), one O(1), one O(5), one O(7), and one O(9) atom to form distorted CdN3O4 pentagonal bipyramids that share  a cornercorner with one K(1)O5 trigonal bipyramid. The Cd(1)-N(1) bond length is 2.42 Å. The Cd(1)-N(2) bond length is 2.51 Å. The Cd(1)-N(3) bond length is 2.42 Å. The Cd(1)-O(1) bond length is 2.32 Å. The Cd(1)-O(5) bond length is 2.66 Å. The Cd(1)-O(7) bond length is 2.32 Å. The Cd(1)-O(9) bond length is 2.47 Å. There are fourteen inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal non-coplanar geometry to one N(1), one H(1), and one H(2) atom. The C(1)-N(1) bond length is 1.48 Å. The C(1)-H(1) bond length is 1.10 Å. The C(1)-H(2) bond length is 1.10 Å. In the second C site, C(2) is bonded in a distorted trigonal non-coplanar geometry to one N(2), one H(3), and one H(4) atom. The C(2)-N(2) bond length is 1.48 Å. The C(2)-H(3) bond length is 1.11 Å. The C(2)-H(4) bond length is 1.10 Å. In the third C site, C(3) is bonded in a distorted trigonal non-coplanar geometry to one N(2), one H(5), and one H(6) atom. The C(3)-N(2) bond length is 1.47 Å. The C(3)-H(5) bond length is 1.10 Å. The C(3)-H(6) bond length is 1.10 Å. In the fourth C site, C(4) is bonded in a distorted trigonal non-coplanar geometry to one N(3), one H(7), and one H(8) atom. The C(4)-N(3) bond length is 1.47 Å. The C(4)-H(7) bond length is 1.10 Å. The C(4)-H(8) bond length is 1.10 Å. In the fifth C site, C(5) is bonded in a distorted trigonal non-coplanar geometry to one N(1), one H(10), and one H(9) atom. The C(5)-N(1) bond length is 1.47 Å. The C(5)-H(10) bond length is 1.10 Å. The C(5)-H(9) bond length is 1.10 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(2) atom. The C(6)-O(1) bond length is 1.28 Å. The C(6)-O(2) bond length is 1.27 Å. In the seventh C site, C(7) is bonded in a distorted trigonal non-coplanar geometry to one N(1), one H(11), and one H(12) atom. The C(7)-N(1) bond length is 1.48 Å. The C(7)-H(11) bond length is 1.10 Å. The C(7)-H(12) bond length is 1.10 Å. In the eighth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one O(3) and one O(4) atom. The C(8)-O(3) bond length is 1.27 Å. The C(8)-O(4) bond length is 1.27 Å. In the ninth C site, C(9) is bonded in a distorted trigonal non-coplanar geometry to one N(2), one H(13), and one H(14) atom. The C(9)-N(2) bond length is 1.46 Å. The C(9)-H(13) bond length is 1.11 Å. The C(9)-H(14) bond length is 1.10 Å. In the tenth C site, C(10) is bonded in a distorted bent 120 degrees geometry to one O(5) and one O(6) atom. The C(10)-O(5) bond length is 1.27 Å. The C(10)-O(6) bond length is 1.28 Å. In the eleventh C site, C(11) is bonded in a distorted trigonal non-coplanar geometry to one C(12), one N(3), one H(15), and one H(16) atom. The C(11)-C(12) bond length is 1.54 Å. The C(11)-N(3) bond length is 1.47 Å. The C(11)-H(15) bond length is 1.10 Å. The C(11)-H(16) bond length is 1.10 Å. In the twelfth C site, C(12) is bonded in a distorted trigonal planar geometry to one C(11), one O(7), and one O(8) atom. The C(12)-O(7) bond length is 1.28 Å. The C(12)-O(8) bond length is 1.26 Å. In the thirteenth C site, C(13) is bonded in a distorted trigonal non-coplanar geometry to one N(3), one H(17), and one H(18) atom. The C(13)-N(3) bond length is 1.47 Å. The C(13)-H(17) bond length is 1.10 Å. The C(13)-H(18) bond length is 1.10 Å. In the fourteenth C site, C(14) is bonded in a distorted bent 120 degrees geometry to one O(10) and one O(9) atom. The C(14)-O(10) bond length is 1.27 Å. The C(14)-O(9) bond length is 1.28 Å. There are three inequivalent N sites. In the first N site, N(1) is bonded to one Cd(1), one C(1), one C(5), and one C(7) atom to form distorted corner-sharing NCdC3 tetrahedra. In the second N site, N(2) is bonded to one Cd(1), one C(2), one C(3), and one C(9) atom to form distorted corner-sharing NCdC3 tetrahedra. In the third N site, N(3) is bonded to one Cd(1), one C(11), one C(13), and one C(4) atom to form distorted corner-sharing NCdC3 tetrahedra. There are eighteen inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(1) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(2) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(2) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one K(3) and one C(3) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(3) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(4) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(4) atom. In the ninth H site, H(9) is bonded in a single-bond geometry to one K(3) and one C(5) atom. In the tenth H site, H(10) is bonded in a single-bond geometry to one C(5) atom. In the eleventh H site, H(11) is bonded in a single-bond geometry to one C(7) atom. In the twelfth H site, H(12) is bonded in a single-bond geometry to one C(7) atom. In the thirteenth H site, H(13) is bonded in a single-bond geometry to one C(9) atom. In the fourteenth H site, H(14) is bonded in a single-bond geometry to one C(9) atom. In the fifteenth H site, H(15) is bonded in a single-bond geometry to one C(11) atom. In the sixteenth H site, H(16) is bonded in a single-bond geometry to one C(11) atom. In the seventeenth H site, H(17) is bonded in a single-bond geometry to one C(13) atom. In the eighteenth H site, H(18) is bonded in a single-bond geometry to one C(13) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one K(1), one Cd(1), and one C(6) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one C(6) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one K(3) and one C(8) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent K(3) and one C(8) atom. In the fifth O site, O(5) is bonded in a single-bond geometry to one K(2), one Cd(1), and one C(10) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one K(1), two equivalent K(2), and one C(10) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one K(2), one Cd(1), and one C(12) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to two equivalent K(1) and one C(12) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one K(3), one Cd(1), and one C(14) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one K(3) and one C(14) atom. Linkers: 2 [O]C(=O)CN(CCN(CC([O])=O)CC([O])=O)CCN(CC([O])=O)CC([O])=O. Metal clusters: 6 [K] ,2 [Cd]. The MOF has largest included sphere 2.36 A, density 1.78 g/cm3, surface area 2694.57 m2/g, accessible volume 0.05 cm3/g