K2NaC5H3O7CH2 crystallizes in the triclinic P-1 space group. The structure consists of two 02329_fluka molecules inside a K2NaC5H3O7 framework. In the K2NaC5H3O7 framework, there are two inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to one H(1), one H(2), one O(1), one O(2), one O(4), one O(7), and two equivalent O(3) atoms. The K(1)-H(1) bond length is 2.86 Å. The K(1)-H(2) bond length is 2.63 Å. The K(1)-O(1) bond length is 2.85 Å. The K(1)-O(2) bond length is 2.99 Å. The K(1)-O(4) bond length is 2.67 Å. The K(1)-O(7) bond length is 2.88 Å. There is one shorter (2.65 Å) and one longer (2.91 Å) K(1)-O(3) bond length. In the second K site, K(2) is bonded in a 7-coordinate geometry to one O(4), one O(5), one O(6), two equivalent O(1), and two equivalent O(2) atoms. The K(2)-O(4) bond length is 3.16 Å. The K(2)-O(5) bond length is 2.62 Å. The K(2)-O(6) bond length is 2.65 Å. There is one shorter (2.83 Å) and one longer (2.94 Å) K(2)-O(1) bond length. There is one shorter (2.70 Å) and one longer (2.90 Å) K(2)-O(2) bond length. Na(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(7), two equivalent O(5), and two equivalent O(6) atoms. The Na(1)-O(1) bond length is 2.42 Å. The Na(1)-O(2) bond length is 2.55 Å. The Na(1)-O(7) bond length is 2.43 Å. There is one shorter (2.39 Å) and one longer (2.80 Å) Na(1)-O(5) bond length. There is one shorter (2.38 Å) and one longer (2.44 Å) Na(1)-O(6) bond length. There are five 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 1.27 Å. In the second C site, C(2) is bonded in a distorted water-like geometry to one H(1) and one H(2) atom. The C(2)-H(1) bond length is 1.10 Å. The C(2)-H(2) bond length is 1.09 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one O(7) atom. The C(3)-O(7) bond length is 1.43 Å. In the fourth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one O(3) and one O(4) atom. The C(5)-O(3) bond length is 1.27 Å. The C(5)-O(4) bond length is 1.29 Å. In the fifth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one O(5) and one O(6) atom. The C(6)-O(5) bond length is 1.27 Å. The C(6)-O(6) bond length is 1.27 Å. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one K(1) and one C(2) atom. In the second H site, H(2) is bonded in a single-bond geometry to one K(1) and one C(2) atom. In the third H site, H(5) is bonded in a distorted single-bond geometry to one O(4) and one O(7) atom. The H(5)-O(4) bond length is 1.64 Å. The H(5)-O(7) bond length is 1.01 Å. There are seven inequivalent O sites. In the first O site, O(3) is bonded in a distorted single-bond geometry to two equivalent K(1) and one C(5) atom. In the second O site, O(4) is bonded in a 4-coordinate geometry to one K(1), one K(2), one C(5), and one H(5) atom. In the third O site, O(5) is bonded in a 1-coordinate geometry to one K(2), two equivalent Na(1), and one C(6) atom. In the fourth O site, O(6) is bonded in a 4-coordinate geometry to one K(2), two equivalent Na(1), and one C(6) atom. In the fifth O site, O(7) is bonded in a 2-coordinate geometry to one K(1), one Na(1), one C(3), and one H(5) atom. In the sixth O site, O(1) is bonded in a 1-coordinate geometry to one K(1), two equivalent K(2), one Na(1), and one C(1) atom. In the seventh O site, O(2) is bonded in a distorted single-bond geometry to one K(1), two equivalent K(2), one Na(1), and one C(1) atom. Linkers: 2 [O]C(=O)CC(O)(CC([O])=O)C([O])=O. Metal clusters: 4 [K] ,2 [Na]. The MOF has largest included sphere 1.23 A, density 2.05 g/cm3, surface area 757.28 m2/g, accessible volume 0.02 cm3/g