Ga12C54H18O49 crystallizes in the hexagonal P6_3/mmc space group. There are three inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one O(5) and four equivalent O(1) atoms to form corner-sharing GaO5 square pyramids. The Ga(1)-O(5) bond length is 1.88 Å. All Ga(1)-O(1) bond lengths are 1.98 Å. In the second Ga site, Ga(2) is bonded to one O(4), two equivalent O(2), and two equivalent O(6) atoms to form distorted GaO5 square pyramids that share  a cornercorner with one Ga(3)O6 octahedra and corners with two equivalent Ga(2)O5 square pyramids. The corner-sharing octahedral tilt angles are 54°. The Ga(2)-O(4) bond length is 1.92 Å. Both Ga(2)-O(2) bond lengths are 2.01 Å. Both Ga(2)-O(6) bond lengths are 1.92 Å. In the third Ga site, Ga(3) is bonded to two equivalent O(4) and four equivalent O(3) atoms to form corner-sharing GaO6 octahedra. Both Ga(3)-O(4) bond lengths are 1.91 Å. All Ga(3)-O(3) bond lengths are 1.98 Å. There are six inequivalent C sites. In the first C site, C(4) is bonded in a bent 120 degrees geometry to one C(5) and two equivalent O(1) atoms. The C(4)-C(5) bond length is 1.50 Å. Both C(4)-O(1) bond lengths are 1.25 Å. In the second C site, C(5) is bonded in a trigonal planar geometry to one C(4) and two equivalent C(2) atoms. Both C(5)-C(2) bond lengths are 1.39 Å. In the third C site, C(6) is bonded in a single-bond geometry to two equivalent C(3) and one H(2) atom. Both C(6)-C(3) bond lengths are 1.39 Å. The C(6)-H(2) bond length is 0.93 Å. In the fourth C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(2), and one O(3) atom. The C(1)-C(3) bond length is 1.49 Å. The C(1)-O(2) bond length is 1.26 Å. The C(1)-O(3) bond length is 1.25 Å. In the fifth C site, C(2) is bonded in a distorted single-bond geometry to one C(3), one C(5), and one H(1) atom. The C(2)-C(3) bond length is 1.39 Å. The C(2)-H(1) bond length is 0.93 Å. In the sixth C site, C(3) is bonded in a trigonal planar geometry to one C(1), one C(2), and one C(6) atom. There are two inequivalent H sites. In the first H site, H(2) is bonded in a single-bond geometry to one C(6) atom. In the second H site, H(1) is bonded in a single-bond geometry to one C(2) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Ga(1) and one C(4) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Ga(2) and one C(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Ga(3) and one C(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Ga(2) and one Ga(3) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to three equivalent Ga(1) atoms. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to two equivalent Ga(2) atoms. Linkers: 12 [O]C(=O)c1cc(C([O])=O)cc(C([O])=O)c1. Metal clusters: 2 O=[C]O[Ga]O[C]O[Ga]1O[C]O[Ga](O[C]=O)O1.[O][C]=O.[O][C]=O ,18 [Ga]. The MOF has largest included sphere 8.53 A, density 1.30 g/cm3, surface area 2772.76 m2/g, accessible volume 0.43 cm3/g