Rb2NaC5H3O7CH2 crystallizes in the triclinic P-1 space group. The structure consists of two 02329_fluka molecules inside a Rb2NaC5H3O7 framework. In the Rb2NaC5H3O7 framework, there are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 9-coordinate geometry to one H(3), one H(4), one O(1), one O(3), one O(4), one O(7), and three equivalent O(2) atoms. The Rb(1)-H(3) bond length is 2.90 Å. The Rb(1)-H(4) bond length is 2.77 Å. The Rb(1)-O(1) bond length is 2.83 Å. The Rb(1)-O(3) bond length is 2.97 Å. The Rb(1)-O(4) bond length is 3.08 Å. The Rb(1)-O(7) bond length is 3.02 Å. There are a spread of Rb(1)-O(2) bond distances ranging from 2.80-3.26 Å. In the second Rb site, Rb(2) is bonded in a 7-coordinate geometry to one O(1), one O(5), one O(6), two equivalent O(3), and two equivalent O(4) atoms. The Rb(2)-O(1) bond length is 3.18 Å. The Rb(2)-O(5) bond length is 2.80 Å. The Rb(2)-O(6) bond length is 2.74 Å. There is one shorter (2.98 Å) and one longer (3.05 Å) Rb(2)-O(3) bond length. There is one shorter (2.87 Å) and one longer (3.00 Å) Rb(2)-O(4) bond length. Na(1) is bonded in a 6-coordinate geometry to one O(3), one O(4), one O(6), one O(7), and two equivalent O(5) atoms. The Na(1)-O(3) bond length is 2.44 Å. The Na(1)-O(4) bond length is 2.58 Å. The Na(1)-O(6) bond length is 2.38 Å. The Na(1)-O(7) bond length is 2.43 Å. There is one shorter (2.39 Å) and one longer (2.46 Å) Na(1)-O(5) 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 1.29 Å. The C(1)-O(2) bond length is 1.27 Å. In the second 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 third C site, C(4) is bonded in a distorted water-like geometry to one H(3) and one H(4) atom. The C(4)-H(3) bond length is 1.10 Å. The C(4)-H(4) bond length is 1.10 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 1.28 Å. The C(5)-O(4) bond length is 1.27 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(3) is bonded in a single-bond geometry to one Rb(1) and one C(4) atom. In the second H site, H(4) is bonded in a single-bond geometry to one Rb(1) and one C(4) atom. In the third H site, H(5) is bonded in a distorted bent 150 degrees geometry to one O(1) and one O(7) atom. The H(5)-O(1) bond length is 1.62 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 1-coordinate geometry to one Rb(1), two equivalent Rb(2), one Na(1), and one C(5) atom. In the second O site, O(4) is bonded in a distorted single-bond geometry to one Rb(1), two equivalent Rb(2), one Na(1), and one C(5) atom. In the third O site, O(5) is bonded in a 4-coordinate geometry to one Rb(2), two equivalent Na(1), and one C(6) atom. In the fourth O site, O(6) is bonded in a 1-coordinate geometry to one Rb(2), one Na(1), and one C(6) atom. In the fifth O site, O(7) is bonded in a 2-coordinate geometry to one Rb(1), one Na(1), one C(3), and one H(5) atom. In the sixth O site, O(1) is bonded in a 2-coordinate geometry to one Rb(1), one Rb(2), one C(1), and one H(5) atom. In the seventh O site, O(2) is bonded in a distorted single-bond geometry to three equivalent Rb(1) and one C(1) atom. Linkers: 2 [O]C(=O)CC(O)(CC([O])=O)C([O])=O. Metal clusters: 4 [Rb] ,2 [Na]. The MOF has largest included sphere 1.69 A, density 2.52 g/cm3, surface area 1765.57 m2/g, accessible volume 0.06 cm3/g