In3C27H9O13 crystallizes in the cubic Pm-3n space group. In(1) is bonded to one O(3), two equivalent O(1), and two equivalent O(2) atoms to form corner-sharing InO5 square pyramids. The In(1)-O(3) bond length is 2.04 Å. Both In(1)-O(1) bond lengths are 2.15 Å. Both In(1)-O(2) bond lengths are 2.14 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(2), one C(4), and one H(1) atom. The C(1)-C(2) bond length is 1.34 Å. The C(1)-C(4) bond length is 1.42 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(1), one C(3), and one C(5) atom. The C(2)-C(3) bond length is 1.52 Å. The C(2)-C(5) bond length is 1.39 Å. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(1), and one O(2) atom. The C(3)-O(1) bond length is 1.20 Å. The C(3)-O(2) bond length is 1.33 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(6) and two equivalent C(1) atoms. The C(4)-C(6) bond length is 1.41 Å. In the fifth C site, C(5) is bonded in a distorted single-bond geometry to two equivalent C(2) and one H(2) atom. The C(5)-H(2) bond length is 0.93 Å. In the sixth C site, C(6) is bonded in a linear geometry to one C(4) and one C(6) atom. The C(6)-C(6) bond length is 1.16 Å. There are two inequivalent H sites. In the first H site, H(2) is bonded in a single-bond geometry to one C(5) atom. In the second H site, H(1) is bonded in a single-bond geometry to one C(1) atom. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one In(1) and one C(3) atom. In the second O site, O(3) is bonded in a trigonal planar geometry to three equivalent In(1) atoms. In the third O site, O(2) is bonded in a distorted bent 150 degrees geometry to one In(1) and one C(3) atom. Linkers: 12 [O]C(=O)c1cc(C#Cc2cc(C([O])=O)cc(C([O])=O)c2)cc(C([O])=O)c1. Metal clusters: 8 O=[C]O[In](O[C]=O)O[In](O[C]=O)O[C]=O.O=[C]O[In]O[C]=O. RCSR code: soc. The MOF has largest included sphere 11.54 A, density 1.02 g/cm3, surface area 2964.10 m2/g, accessible volume 0.60 cm3/g