Co2In3H9(C3O2)15 crystallizes in the hexagonal P-62c space group. Co(1) is bonded in a distorted trigonal non-coplanar geometry to three equivalent O(1) atoms. All Co(1)-O(1) bond lengths are 2.03 Å. In(1) is bonded in a distorted hexagonal bipyramidal geometry to two equivalent O(2), two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms. Both In(1)-O(2) bond lengths are 2.22 Å. Both In(1)-O(3) bond lengths are 2.41 Å. Both In(1)-O(4) bond lengths are 2.27 Å. Both In(1)-O(5) bond lengths are 2.30 Å. There are nine inequivalent C sites. In the first C site, C(5) is bonded in a trigonal planar geometry to one C(6) and two equivalent C(4) atoms. The C(5)-C(6) bond length is 1.53 Å. There is one shorter (1.37 Å) and one longer (1.42 Å) C(5)-C(4) bond length. In the second C site, C(6) is bonded in a bent 120 degrees geometry to one C(5), one O(4), and one O(5) atom. The C(6)-O(4) bond length is 1.24 Å. The C(6)-O(5) bond length is 1.24 Å. In the third C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(8) and two equivalent O(1) atoms. The C(7)-C(8) bond length is 1.52 Å. Both C(7)-O(1) bond lengths are 1.22 Å. In the fourth C site, C(8) is bonded in a trigonal planar geometry to one C(7) and two equivalent C(3) atoms. Both C(8)-C(3) bond lengths are 1.38 Å. In the fifth C site, C(9) is bonded in a distorted single-bond geometry to two equivalent C(1) and one H(2) atom. Both C(9)-C(1) bond lengths are 1.40 Å. The C(9)-H(2) bond length is 0.93 Å. In the sixth C site, C(1) is bonded in a trigonal planar geometry to one C(2), one C(3), and one C(9) atom. The C(1)-C(2) bond length is 1.47 Å. The C(1)-C(3) bond length is 1.36 Å. In the seventh C site, C(2) is bonded in a bent 120 degrees geometry to one C(1), one O(2), and one O(3) atom. The C(2)-O(2) bond length is 1.28 Å. The C(2)-O(3) bond length is 1.22 Å. In the eighth C site, C(3) is bonded in a distorted single-bond geometry to one C(1), one C(8), and one H(1) atom. The C(3)-H(1) bond length is 0.93 Å. In the ninth C site, C(4) is bonded in a bent 120 degrees geometry to two equivalent C(5) atoms. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(3) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(9) atom. There are five inequivalent O sites. In the first O site, O(2) is bonded in an L-shaped geometry to one In(1) and one C(2) atom. In the second O site, O(1) is bonded in a bent 150 degrees geometry to one Co(1) and one C(7) atom. In the third O site, O(3) is bonded in a distorted L-shaped geometry to one In(1) and one C(2) atom. In the fourth O site, O(4) is bonded in an L-shaped geometry to one In(1) and one C(6) atom. In the fifth O site, O(5) is bonded in an L-shaped geometry to one In(1) and one C(6) atom. Linkers: 6 [O]C(=O)c1cc(C([O])=O)cc(C([O])=O)c1 ,4 [O]C(=O)c1[c]c(C([O])=O)[c]c(C([O])=O)[c]1. Metal clusters: 6 O=[C]O[In](O[C]=O)O[C]=O.[O][C]=O ,2 [C]1O[Co]2O[C]O[Co](O1)O[C]O2. RCSR code: mco. The MOF has largest included sphere 7.43 A, density 0.86 g/cm3, surface area 3491.52 m2/g, accessible volume 0.80 cm3/g