GaC8H5O5 crystallizes in the monoclinic Cc space group. Ga(1) is bonded to one O(1), one O(2), one O(4), one O(5), and two equivalent O(3) atoms to form corner-sharing GaO6 octahedra. The corner-sharing octahedral tilt angles are 59°. The Ga(1)-O(1) bond length is 2.01 Å. The Ga(1)-O(2) bond length is 2.04 Å. The Ga(1)-O(4) bond length is 2.00 Å. The Ga(1)-O(5) bond length is 2.04 Å. There is one shorter (1.93 Å) and one longer (1.94 Å) Ga(1)-O(3) bond length. There are eight inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(1), and one O(4) atom. The C(1)-C(3) bond length is 1.49 Å. The C(1)-O(1) bond length is 1.27 Å. The C(1)-O(4) bond length is 1.28 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(2), and one O(5) atom. The C(2)-C(4) bond length is 1.49 Å. The C(2)-O(2) bond length is 1.28 Å. The C(2)-O(5) bond length is 1.28 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(1), one C(5), and one C(7) atom. The C(3)-C(5) bond length is 1.40 Å. The C(3)-C(7) bond length is 1.40 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(2), one C(6), and one C(8) atom. The C(4)-C(6) bond length is 1.40 Å. The C(4)-C(8) bond length is 1.40 Å. In the fifth C site, C(5) is bonded in a distorted trigonal planar geometry to one C(3), one C(8), and one H(1) atom. The C(5)-C(8) bond length is 1.39 Å. The C(5)-H(1) bond length is 1.09 Å. In the sixth C site, C(6) is bonded in a distorted trigonal planar geometry to one C(4), one C(7), and one H(2) atom. The C(6)-C(7) bond length is 1.39 Å. The C(6)-H(2) bond length is 1.09 Å. In the seventh C site, C(7) is bonded in a distorted trigonal planar geometry to one C(3), one C(6), and one H(3) atom. The C(7)-H(3) bond length is 1.09 Å. In the eighth C site, C(8) is bonded in a distorted trigonal planar geometry to one C(4), one C(5), and one H(4) atom. The C(8)-H(4) bond length is 1.09 Å. There are five inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(5) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(6) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(7) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(8) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one O(3) atom. The H(5)-O(3) bond length is 0.97 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Ga(1) and one C(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Ga(1) and one C(2) atom. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Ga(1) and one H(5) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Ga(1) and one C(1) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Ga(1) and one C(2) atom. Linkers: 2 [O]C(=O)c1ccc(C([O])=O)cc1. Metal clusters: 2 [Ga]. RCSR code: lvt. The MOF has largest included sphere 1.93 A, density 1.97 g/cm3, surface area 3253.80 m2/g, accessible volume 0.12 cm3/g