SmAgC2H4SO10 crystallizes in the monoclinic P2_1/c space group. Sm(1) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(4), one O(5), one O(7), one O(8), and one O(9) atom. The Sm(1)-O(1) bond length is 2.52 Å. The Sm(1)-O(10) bond length is 2.48 Å. The Sm(1)-O(2) bond length is 2.47 Å. The Sm(1)-O(3) bond length is 2.59 Å. The Sm(1)-O(4) bond length is 2.53 Å. The Sm(1)-O(5) bond length is 2.40 Å. The Sm(1)-O(7) bond length is 2.45 Å. The Sm(1)-O(8) bond length is 2.40 Å. The Sm(1)-O(9) bond length is 2.50 Å. Ag(1) is bonded in a 4-coordinate geometry to one O(1), one O(10), one O(3), and one O(9) atom. The Ag(1)-O(1) bond length is 2.71 Å. The Ag(1)-O(10) bond length is 2.28 Å. The Ag(1)-O(3) bond length is 2.52 Å. The Ag(1)-O(9) bond length is 2.24 Å. There are two inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(2) and one O(9) atom. The C(1)-O(2) bond length is 1.25 Å. The C(1)-O(9) bond length is 1.28 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(10) atom. The C(2)-O(1) bond length is 1.26 Å. The C(2)-O(10) bond length is 1.27 Å. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(3) atom. The H(1)-O(3) bond length is 0.99 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(3) and one O(4) atom. The H(2)-O(3) bond length is 1.00 Å. The H(2)-O(4) bond length is 1.73 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(8) atom. The H(3)-O(8) bond length is 0.99 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(8) atom. The H(4)-O(8) bond length is 0.99 Å. S(1) is bonded in a tetrahedral geometry to one O(4), one O(5), one O(6), and one O(7) atom. The S(1)-O(4) bond length is 1.50 Å. The S(1)-O(5) bond length is 1.49 Å. The S(1)-O(6) bond length is 1.47 Å. The S(1)-O(7) bond length is 1.50 Å. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Sm(1), one Ag(1), and one C(2) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Sm(1) and one C(1) atom. In the third O site, O(3) is bonded in a water-like geometry to one Sm(1), one Ag(1), one H(1), and one H(2) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Sm(1), one H(2), and one S(1) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Sm(1) and one S(1) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one S(1) atom. In the seventh O site, O(7) is bonded in a 2-coordinate geometry to one Sm(1) and one S(1) atom. In the eighth O site, O(8) is bonded in a distorted water-like geometry to one Sm(1), one H(3), and one H(4) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Sm(1), one Ag(1), and one C(1) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Sm(1), one Ag(1), and one C(2) atom. Linkers: 4 [O]C(=O)C([O])=O. Metal clusters: 4 [Sm] ,4 [Ag]. The MOF has largest included sphere 1.45 A, density 3.89 g/cm3, surface area 1423.18 m2/g, accessible volume 0.03 cm3/g