Sn3P2O9 crystallizes in the orthorhombic Pbca space group. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a distorted T-shaped geometry to one O(1), one O(2), and one O(3) atom. The Sn(1)-O(1) bond length is 2.14 Å. The Sn(1)-O(2) bond length is 2.16 Å. The Sn(1)-O(3) bond length is 2.25 Å. In the second Sn site, Sn(2) is bonded in a rectangular see-saw-like geometry to one O(4), one O(5), one O(6), and one O(7) atom. The Sn(2)-O(4) bond length is 2.11 Å. The Sn(2)-O(5) bond length is 2.24 Å. The Sn(2)-O(6) bond length is 2.29 Å. The Sn(2)-O(7) bond length is 2.51 Å. In the third Sn site, Sn(3) is bonded in a distorted rectangular see-saw-like geometry to one O(4), one O(7), one O(8), and one O(9) atom. The Sn(3)-O(4) bond length is 2.15 Å. The Sn(3)-O(7) bond length is 2.44 Å. The Sn(3)-O(8) bond length is 2.24 Å. The Sn(3)-O(9) bond length is 2.37 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded in a tetrahedral geometry to one O(3), one O(5), one O(7), and one O(8) atom. The P(1)-O(3) bond length is 1.61 Å. The P(1)-O(5) bond length is 1.58 Å. The P(1)-O(7) bond length is 1.59 Å. The P(1)-O(8) bond length is 1.55 Å. In the second P site, P(2) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(6), and one O(9) atom. The P(2)-O(1) bond length is 1.60 Å. The P(2)-O(2) bond length is 1.57 Å. The P(2)-O(6) bond length is 1.55 Å. The P(2)-O(9) bond length is 1.59 Å. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Sn(1) and one P(2) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Sn(1) and one P(2) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Sn(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Sn(2) and one Sn(3) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Sn(2) and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted linear geometry to one Sn(2) and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Sn(2), one Sn(3), and one P(1) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Sn(3) and one P(1) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one Sn(3) and one P(2) atom. Linkers: 16 [O]P([O])([O])=O. Metal clusters: 24 [Sn]. The MOF has largest included sphere 4.99 A, density 2.39 g/cm3, surface area 1930.16 m2/g, accessible volume 0.16 cm3/g