InC12H4(SO4)2 crystallizes in the tetragonal P4_322 space group. In(1) is bonded in a distorted hexagonal bipyramidal geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. Both In(1)-O(1) bond lengths are 2.36 Å. Both In(1)-O(2) bond lengths are 2.22 Å. Both In(1)-O(3) bond lengths are 2.34 Å. Both In(1)-O(4) bond lengths are 2.24 Å. There are six inequivalent C sites. In the first C site, C(1) is bonded in a distorted single-bond geometry to one C(3) and one H(1) atom. The C(1)-C(3) bond length is 1.35 Å. The C(1)-H(1) bond length is 0.93 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(4), one C(6), and one S(1) atom. The C(2)-C(4) bond length is 1.37 Å. The C(2)-C(6) bond length is 1.48 Å. The C(2)-S(1) bond length is 1.69 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(1), one C(5), and one S(1) atom. The C(3)-C(5) bond length is 1.47 Å. The C(3)-S(1) bond length is 1.71 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(2) and one H(2) atom. The C(4)-H(2) bond length is 0.93 Å. In the fifth C site, C(5) is bonded in a bent 120 degrees geometry to one C(3), one O(1), and one O(2) atom. The C(5)-O(1) bond length is 1.24 Å. The C(5)-O(2) bond length is 1.26 Å. In the sixth C site, C(6) is bonded in a bent 120 degrees geometry to one C(2), one O(3), and one O(4) atom. The C(6)-O(3) bond length is 1.25 Å. The C(6)-O(4) bond length is 1.26 Å. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(4) atom. S(1) is bonded in an L-shaped geometry to one C(2) and one C(3) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in an L-shaped geometry to one In(1) and one C(5) atom. In the second O site, O(2) is bonded in an L-shaped geometry to one In(1) and one C(5) atom. In the third O site, O(3) is bonded in an L-shaped geometry to one In(1) and one C(6) atom. In the fourth O site, O(4) is bonded in an L-shaped geometry to one In(1) and one C(6) atom. Linkers: 8 [O]C(=O)c1ccc(C([O])=O)s1. Metal clusters: 4 O=[C]O[In](O[C]=O)O[C]=O.[O][C]=O. RCSR code: dia. The MOF has largest included sphere 6.71 A, density 1.05 g/cm3, surface area 3491.15 m2/g, accessible volume 0.58 cm3/g