K2Zn3C18H26(NO14)2 crystallizes in the triclinic P-1 space group. K(1) is bonded in a 8-coordinate geometry to one O(10), one O(11), one O(12), one O(13), one O(3), one O(8), and two equivalent O(14) atoms. The K(1)-O(10) bond length is 2.83 Å. The K(1)-O(11) bond length is 2.85 Å. The K(1)-O(12) bond length is 2.88 Å. The K(1)-O(13) bond length is 2.85 Å. The K(1)-O(3) bond length is 3.14 Å. The K(1)-O(8) bond length is 2.83 Å. There is one shorter (2.74 Å) and one longer (2.77 Å) K(1)-O(14) bond length. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a distorted trigonal bipyramidal geometry to one N(1), one O(1), one O(3), one O(8), and one O(9) atom. The Zn(1)-N(1) bond length is 2.05 Å. The Zn(1)-O(1) bond length is 2.27 Å. The Zn(1)-O(3) bond length is 1.98 Å. The Zn(1)-O(8) bond length is 2.14 Å. The Zn(1)-O(9) bond length is 1.98 Å. In the second Zn site, Zn(2) is bonded in an octahedral geometry to two equivalent O(10), two equivalent O(11), and two equivalent O(7) atoms. Both Zn(2)-O(10) bond lengths are 2.06 Å. Both Zn(2)-O(11) bond lengths are 2.19 Å. Both Zn(2)-O(7) bond lengths are 2.14 Å. There are nine inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(1), and one O(2) atom. The C(1)-C(2) bond length is 1.51 Å. The C(1)-O(1) bond length is 1.28 Å. The C(1)-O(2) bond length is 1.26 Å. In the second C site, C(2) is bonded in a distorted trigonal planar geometry to one C(1), one C(3), and one N(1) atom. The C(2)-C(3) bond length is 1.40 Å. The C(2)-N(1) bond length is 1.34 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(2), one C(4), and one C(5) atom. The C(3)-C(4) bond length is 1.51 Å. The C(3)-C(5) bond length is 1.40 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(3), and one O(4) atom. The C(4)-O(3) bond length is 1.28 Å. The C(4)-O(4) bond length is 1.25 Å. In the fifth C site, C(5) is bonded in a distorted single-bond geometry to one C(3), one C(6), and one H(7) atom. The C(5)-C(6) bond length is 1.40 Å. The C(5)-H(7) bond length is 1.09 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one C(5), one C(7), and one C(8) atom. The C(6)-C(7) bond length is 1.52 Å. The C(6)-C(8) bond length is 1.41 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(6), one O(5), and one O(6) atom. The C(7)-O(5) bond length is 1.27 Å. The C(7)-O(6) bond length is 1.26 Å. In the eighth C site, C(8) is bonded in a distorted trigonal planar geometry to one C(6), one C(9), and one N(1) atom. The C(8)-C(9) bond length is 1.52 Å. The C(8)-N(1) bond length is 1.34 Å. In the ninth C site, C(9) is bonded in a distorted bent 120 degrees geometry to one C(8), one O(7), and one O(8) atom. The C(9)-O(7) bond length is 1.26 Å. The C(9)-O(8) bond length is 1.27 Å. N(1) is bonded in a trigonal planar geometry to one Zn(1), one C(2), and one C(8) atom. There are thirteen inequivalent H sites. In the first H site, H(1) is bonded in a linear geometry to one O(10) and one O(13) atom. The H(1)-O(10) bond length is 1.02 Å. The H(1)-O(13) bond length is 1.55 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(10) atom. The H(2)-O(10) bond length is 0.99 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(11) atom. The H(3)-O(11) bond length is 0.99 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(11) atom. The H(4)-O(11) bond length is 0.99 Å. In the fifth H site, H(5) is bonded in a single-bond geometry to one O(14) atom. The H(5)-O(14) bond length is 0.99 Å. In the sixth H site, H(6) is bonded in a single-bond geometry to one O(14) atom. The H(6)-O(14) bond length is 0.98 Å. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(5) atom. In the eighth H site, H(8) is bonded in a distorted linear geometry to one O(12) and one O(9) atom. The H(8)-O(12) bond length is 1.58 Å. The H(8)-O(9) bond length is 1.02 Å. In the ninth H site, H(9) is bonded in a linear geometry to one O(5) and one O(9) atom. The H(9)-O(5) bond length is 1.56 Å. The H(9)-O(9) bond length is 1.02 Å. In the tenth H site, H(10) is bonded in a single-bond geometry to one O(12) atom. The H(10)-O(12) bond length is 0.99 Å. In the eleventh H site, H(11) is bonded in a single-bond geometry to one O(12) atom. The H(11)-O(12) bond length is 0.99 Å. In the twelfth H site, H(12) is bonded in a distorted single-bond geometry to one O(13) and one O(6) atom. The H(12)-O(13) bond length is 1.00 Å. The H(12)-O(6) bond length is 1.66 Å. In the thirteenth H site, H(13) is bonded in a single-bond geometry to one O(13) atom. The H(13)-O(13) bond length is 1.00 Å. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Zn(1) and one C(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one C(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one K(1), one Zn(1), and one C(4) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one C(4) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one C(7) and one H(9) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one C(7) and one H(12) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Zn(2) and one C(9) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one K(1), one Zn(1), and one C(9) atom. In the ninth O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to one Zn(1), one H(8), and one H(9) atom. In the tenth O site, O(10) is bonded in a distorted water-like geometry to one K(1), one Zn(2), one H(1), and one H(2) atom. In the eleventh O site, O(11) is bonded in a distorted water-like geometry to one K(1), one Zn(2), one H(3), and one H(4) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one K(1), one H(10), one H(11), and one H(8) atom. In the thirteenth O site, O(13) is bonded in a 2-coordinate geometry to one K(1), one H(1), one H(12), and one H(13) atom. In the fourteenth O site, O(14) is bonded in a water-like geometry to two equivalent K(1), one H(5), and one H(6) atom. Linkers: 2 [O]C(=O)c1cc(C([O])=O)c(C([O])=O)nc1C([O])=O. Metal clusters: 2 [K] ,3 [Zn]. The MOF has largest included sphere 1.79 A, density 2.06 g/cm3, surface area 2736.94 m2/g, accessible volume 0.06 cm3/g