MnC8H4O5 crystallizes in the cubic Ia-3 space group. Mn(1) is bonded to one O(2), one O(3), one O(4), one O(5), and two equivalent O(1) atoms to form corner-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles are 71°. The Mn(1)-O(2) bond length is 2.10 Å. The Mn(1)-O(3) bond length is 2.08 Å. The Mn(1)-O(4) bond length is 2.29 Å. The Mn(1)-O(5) bond length is 2.19 Å. There is one shorter (2.16 Å) and one longer (2.18 Å) Mn(1)-O(1) bond length. There are eight inequivalent C sites. In the first C site, C(3) is bonded in a trigonal planar geometry to one C(1), one C(2), and one C(7) atom. The C(3)-C(1) bond length is 1.41 Å. The C(3)-C(2) bond length is 1.49 Å. The C(3)-C(7) bond length is 1.40 Å. In the second C site, C(4) is bonded in a trigonal planar geometry to one C(1), one C(5), and one C(6) atom. The C(4)-C(1) bond length is 1.42 Å. The C(4)-C(5) bond length is 1.48 Å. The C(4)-C(6) bond length is 1.40 Å. In the third C site, C(7) is bonded in a distorted trigonal planar geometry to one C(3), one C(8), and one H(2) atom. The C(7)-C(8) bond length is 1.39 Å. The C(7)-H(2) bond length is 1.09 Å. In the fourth C site, C(8) is bonded in a distorted trigonal planar geometry to one C(6), one C(7), and one H(3) atom. The C(8)-C(6) bond length is 1.39 Å. The C(8)-H(3) bond length is 1.09 Å. In the fifth C site, C(2) is bonded in a bent 120 degrees geometry to one C(3), one O(1), and one O(2) atom. The C(2)-O(1) bond length is 1.30 Å. The C(2)-O(2) bond length is 1.26 Å. In the sixth C site, C(6) is bonded in a distorted single-bond geometry to one C(4), one C(8), and one H(1) atom. The C(6)-H(1) bond length is 1.09 Å. In the seventh C site, C(1) is bonded in a distorted single-bond geometry to one C(3), one C(4), and one O(4) atom. The C(1)-O(4) bond length is 1.36 Å. In the eighth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(3), and one O(5) atom. The C(5)-O(3) bond length is 1.26 Å. The C(5)-O(5) bond length is 1.30 Å. There are four inequivalent H sites. In the first H site, H(3) is bonded in a single-bond geometry to one C(8) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(7) atom. In the third H site, H(1) is bonded in a single-bond geometry to one C(6) atom. In the fourth H site, H(4) is bonded in a bent 150 degrees geometry to one O(4) and one O(5) atom. The H(4)-O(4) bond length is 1.05 Å. The H(4)-O(5) bond length is 1.46 Å. There are five inequivalent O sites. In the first O site, O(3) is bonded in a bent 150 degrees geometry to one Mn(1) and one C(5) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Mn(1) and one C(2) atom. In the third O site, O(4) is bonded in a distorted trigonal planar geometry to one Mn(1), one C(1), and one H(4) atom. In the fourth O site, O(1) is bonded in a trigonal planar geometry to two equivalent Mn(1) and one C(2) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Mn(1), one C(5), and one H(4) atom. Linkers: 24 [O]C(=O)c1cccc(C([O])=O)c1O. Metal clusters: 4 O[Mn]123O[C]O[Mn]4(O)(O[C]O1)O[C]O[Mn]1(O)(O[C]O4)O[C]O[Mn]4(O)(O[C]O1)O[C]O[Mn]1(O)(O[C]O[Mn](O)(O[C]O2)(O[C]O3)O[C]O1)O[C]O4. RCSR code: pcu. The MOF has largest included sphere 5.32 A, density 1.62 g/cm3, surface area 3040.43 m2/g, accessible volume 0.22 cm3/g