MnC9H6O4 crystallizes in the orthorhombic Pna2_1 space group. Mn(1) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(4), and two equivalent O(2) atoms. The Mn(1)-O(1) bond length is 2.14 Å. The Mn(1)-O(3) bond length is 2.09 Å. The Mn(1)-O(4) bond length is 2.06 Å. There is one shorter (2.09 Å) and one longer (2.62 Å) Mn(1)-O(2) bond length. There are nine inequivalent C sites. In the first C site, C(5) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(7) atom. The C(5)-C(1) bond length is 1.47 Å. The C(5)-C(3) bond length is 1.36 Å. The C(5)-C(7) bond length is 1.37 Å. In the second C site, C(6) is bonded in a trigonal planar geometry to one C(2), one C(4), and one C(7) atom. The C(6)-C(2) bond length is 1.48 Å. The C(6)-C(4) bond length is 1.37 Å. The C(6)-C(7) bond length is 1.36 Å. In the third C site, C(7) is bonded in a distorted single-bond geometry to one C(5), one C(6), and one H(3) atom. The C(7)-H(3) bond length is 0.95 Å. In the fourth C site, C(8) is bonded in a trigonal planar geometry to one C(3), one C(4), and one C(9) atom. The C(8)-C(3) bond length is 1.36 Å. The C(8)-C(4) bond length is 1.37 Å. The C(8)-C(9) bond length is 1.49 Å. In the fifth C site, C(9) is bonded in a trigonal non-coplanar geometry to one C(8) and three equivalent H(1,2,5) atoms. All C(9)-H(1,2,5) bond lengths are 0.98 Å. In the sixth C site, C(1) is bonded in a bent 120 degrees geometry to one C(5), one O(1), and one O(2) atom. The C(1)-O(1) bond length is 1.23 Å. The C(1)-O(2) bond length is 1.24 Å. In the seventh C site, C(2) is bonded in a distorted bent 120 degrees geometry to one C(6), one O(3), and one O(4) atom. The C(2)-O(3) bond length is 1.23 Å. The C(2)-O(4) bond length is 1.23 Å. In the eighth C site, C(3) is bonded in a single-bond geometry to one C(5), one C(8), and one H(6) atom. The C(3)-H(6) bond length is 0.95 Å. In the ninth C site, C(4) is bonded in a distorted single-bond geometry to one C(6), one C(8), and one H(4) atom. The C(4)-H(4) bond length is 0.95 Å. There are four inequivalent H sites. In the first H site, H(1,2,5) is bonded in a single-bond geometry to one C(9) atom. In the second H site, H(3) is bonded in a single-bond geometry to one C(7) atom. In the third H site, H(4) is bonded in a single-bond geometry to one C(4) atom. In the fourth H site, H(6) is bonded in a single-bond geometry to one C(3) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to one Mn(1) and one C(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to two equivalent Mn(1) and one C(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Mn(1) and one C(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Mn(1) and one C(2) atom. Linkers: 4 Cc1cc(C([O])=O)cc(C([O])=O)c1. Metal clusters: 4 [Mn]. The MOF has largest included sphere 4.77 A, density 1.29 g/cm3, surface area 3810.07 m2/g, accessible volume 0.38 cm3/g