MnC7NH4O5 crystallizes in the monoclinic P2_1/c space group. Mn(1) is bonded to one N(1), one O(4), one O(5), two equivalent O(2), and two equivalent O(3) atoms to form distorted edge-sharing MnNO6 pentagonal bipyramids. The Mn(1)-N(1) bond length is 2.22 Å. The Mn(1)-O(4) bond length is 2.10 Å. The Mn(1)-O(5) bond length is 2.33 Å. There is one shorter (2.29 Å) and one longer (2.31 Å) Mn(1)-O(2) bond length. There is one shorter (2.27 Å) and one longer (2.40 Å) Mn(1)-O(3) bond length. There are seven inequivalent C sites. In the first C site, C(4) is bonded in a distorted single-bond geometry to one C(3), one C(5), and one H(4) atom. The C(4)-C(3) bond length is 1.40 Å. The C(4)-C(5) bond length is 1.39 Å. The C(4)-H(4) bond length is 1.09 Å. In the second C site, C(5) is bonded in a distorted trigonal planar geometry to one C(4), one C(7), and one N(1) atom. The C(5)-C(7) bond length is 1.50 Å. The C(5)-N(1) bond length is 1.34 Å. In the third C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(1), one O(1), and one O(3) atom. The C(6)-C(1) bond length is 1.51 Å. The C(6)-O(1) bond length is 1.26 Å. The C(6)-O(3) bond length is 1.28 Å. In the fourth C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(5), one O(4), and one O(5) atom. The C(7)-O(4) bond length is 1.28 Å. The C(7)-O(5) bond length is 1.26 Å. In the fifth C site, C(1) is bonded in a distorted trigonal planar geometry to one C(2), one C(6), and one N(1) atom. The C(1)-C(2) bond length is 1.39 Å. The C(1)-N(1) bond length is 1.34 Å. In the sixth C site, C(2) is bonded in a distorted single-bond geometry to one C(1), one C(3), and one H(3) atom. The C(2)-C(3) bond length is 1.41 Å. The C(2)-H(3) bond length is 1.09 Å. In the seventh C site, C(3) is bonded in a trigonal planar geometry to one C(2), one C(3), and one C(4) atom. The C(3)-C(3) bond length is 1.48 Å. N(1) is bonded in a trigonal planar geometry to one Mn(1), one C(1), and one C(5) atom. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(2) atom. The H(1)-O(2) bond length is 0.98 Å. In the second H site, H(2) is bonded in a distorted bent 150 degrees geometry to one O(1) and one O(2) atom. The H(2)-O(1) bond length is 1.56 Å. The H(2)-O(2) bond length is 1.03 Å. In the third H site, H(3) is bonded in a single-bond geometry to one C(2) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(4) atom. There are five inequivalent O sites. In the first O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Mn(1) and one C(7) atom. In the second O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Mn(1) and one C(7) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to two equivalent Mn(1) and one C(6) atom. In the fourth O site, O(1) is bonded in a water-like geometry to one C(6) and one H(2) atom. In the fifth O site, O(2) is bonded in a distorted bent 120 degrees geometry to two equivalent Mn(1), one H(1), and one H(2) atom. Linkers: 2 [C]c1cc(-c2cc(C([O])=O)nc(C([O])=O)c2)cc(C([O])=O)n1 ,1 [O]C(=O)c1cc(-c2cc(C([O])=O)nc(C([O])=O)c2)cc(C([O])=O)n1. Metal clusters: 4 [Mn]. The MOF has largest included sphere 1.96 A, density 2.08 g/cm3, surface area 2760.27 m2/g, accessible volume 0.07 cm3/g