Na3NH2S2O10(CH2)2 crystallizes in the monoclinic Cm space group. The structure consists of four 02329_fluka molecules inside a Na3NH2S2O10 framework. In the Na3NH2S2O10 framework, there are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 7-coordinate geometry to one O(1), one O(6), one O(7), two equivalent O(4), and two equivalent O(5) atoms. The Na(1)-O(1) bond length is 2.41 Å. The Na(1)-O(6) bond length is 2.35 Å. The Na(1)-O(7) bond length is 2.44 Å. Both Na(1)-O(4) bond lengths are 2.34 Å. There is one shorter (2.45 Å) and one longer (2.65 Å) Na(1)-O(5) bond length. In the second Na site, Na(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(8) atom to form edge-sharing NaO6 octahedra. The Na(2)-O(1) bond length is 2.40 Å. The Na(2)-O(2) bond length is 2.31 Å. The Na(2)-O(3) bond length is 2.36 Å. The Na(2)-O(4) bond length is 2.41 Å. The Na(2)-O(5) bond length is 2.63 Å. The Na(2)-O(8) bond length is 2.36 Å. N(1) is bonded in a trigonal planar geometry to one O(5), one O(6), and one O(7) atom. The N(1)-O(5) bond length is 1.29 Å. The N(1)-O(6) bond length is 1.27 Å. The N(1)-O(7) bond length is 1.25 Å. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(8) atom. The H(1)-O(8) bond length is 0.98 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(6) and one O(8) atom. The H(2)-O(6) bond length is 1.74 Å. The H(2)-O(8) bond length is 0.99 Å. There are two inequivalent S sites. In the first S site, S(1) is bonded in a distorted trigonal non-coplanar geometry to one O(1) and two equivalent O(2) atoms. The S(1)-O(1) bond length is 1.49 Å. Both S(1)-O(2) bond lengths are 1.47 Å. In the second S site, S(2) is bonded in a distorted trigonal non-coplanar geometry to one O(3) and two equivalent O(4) atoms. The S(2)-O(3) bond length is 1.47 Å. Both S(2)-O(4) bond lengths are 1.47 Å. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a 3-coordinate geometry to one Na(1), one Na(2), and one S(2) atom. In the second O site, O(5) is bonded in a 5-coordinate geometry to two equivalent Na(1), two equivalent Na(2), and one N(1) atom. In the third O site, O(6) is bonded in a 3-coordinate geometry to one Na(1), one N(1), and one H(2) atom. In the fourth O site, O(7) is bonded in a distorted L-shaped geometry to one Na(1) and one N(1) atom. In the fifth O site, O(8) is bonded in a distorted water-like geometry to two equivalent Na(2), one H(1), and one H(2) atom. In the sixth O site, O(1) is bonded in a distorted trigonal pyramidal geometry to one Na(1), two equivalent Na(2), and one S(1) atom. In the seventh O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Na(2) and one S(1) atom. In the eighth O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Na(2) and one S(2) atom. Linkers: 1 [O]S([O])([O])CCS([O])([O])[O]. Metal clusters: 3 [Na]. The MOF has largest included sphere 1.38 A, density 2.04 g/cm3, surface area 2451.71 m2/g, accessible volume 0.05 cm3/g