EuInH6(C9O8)2 crystallizes in the tetragonal P4_2/mcm space group. Eu(1) is bonded in a 8-coordinate geometry to four equivalent O(3) and four equivalent O(4) atoms. All Eu(1)-O(3) bond lengths are 2.33 Å. All Eu(1)-O(4) bond lengths are 2.48 Å. In(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(2) atoms. All In(1)-O(1) bond lengths are 2.47 Å. All In(1)-O(2) bond lengths are 2.16 Å. There are six inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one C(2), one C(3), and one C(5) atom. The C(1)-C(2) bond length is 1.51 Å. The C(1)-C(3) bond length is 1.37 Å. The C(1)-C(5) bond length is 1.39 Å. In the second C site, C(2) is bonded in a bent 120 degrees geometry to one C(1), one O(1), and one O(2) atom. The C(2)-O(1) bond length is 1.21 Å. The C(2)-O(2) bond length is 1.27 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(1), one C(4), and one H(1) atom. The C(3)-C(4) bond length is 1.36 Å. The C(3)-H(1) bond length is 0.95 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(6) and two equivalent C(3) atoms. The C(4)-C(6) bond length is 1.47 Å. In the fifth C site, C(5) is bonded in a distorted single-bond geometry to two equivalent C(1) and one H(2) atom. The C(5)-H(2) bond length is 0.95 Å. In the sixth C site, C(6) is bonded in a bent 120 degrees geometry to one C(4) and two equivalent O(3) atoms. Both C(6)-O(3) bond lengths are 1.24 Å. 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(5) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one In(1) and one C(2) atom. In the second O site, O(2) is bonded in a water-like geometry to one In(1) and one C(2) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Eu(1) and one C(6) atom. In the fourth O site, O(4) is bonded in a distorted L-shaped geometry to one Eu(1) and one O(4) atom. The O(4)-O(4) bond length is 1.06 Å. Linkers: 8 [O]C(=O)c1cc(C([O])=O)cc(C([O])=O)c1. Metal clusters: 2 O=O.O=O.[O]O[Eu]123O[C]O[Eu](O[O])(O[C]O1)(O[C]O2)O[C]O3 ,4 O=[C]O[In](O[C]=O)O[C]=O.[O][C]=O. RCSR code: eed. The MOF has largest included sphere 8.91 A, density 1.06 g/cm3, surface area 3135.22 m2/g, accessible volume 0.61 cm3/g