MnC8NH5O4 crystallizes in the orthorhombic Pna2_1 space group. Mn(1) is bonded in a trigonal pyramidal geometry to one O(1), one O(2), one O(3), and one O(4) atom. The Mn(1)-O(1) bond length is 2.10 Å. The Mn(1)-O(2) bond length is 2.15 Å. The Mn(1)-O(3) bond length is 2.07 Å. The Mn(1)-O(4) bond length is 2.09 Å. There are eight inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one C(2), one C(6), and one C(7) atom. The C(1)-C(2) bond length is 1.39 Å. The C(1)-C(6) bond length is 1.39 Å. The C(1)-C(7) bond length is 1.51 Å. In the second C site, C(2) is bonded in a single-bond geometry to one C(1), one C(3), and one H(3) atom. The C(2)-C(3) bond length is 1.40 Å. The C(2)-H(3) bond length is 0.93 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(2), one C(4), and one C(8) atom. The C(3)-C(4) bond length is 1.39 Å. The C(3)-C(8) bond length is 1.50 Å. In the fourth C site, C(4) is bonded in a single-bond geometry to one C(3), one C(5), and one H(4) atom. The C(4)-C(5) bond length is 1.39 Å. The C(4)-H(4) bond length is 0.93 Å. In the fifth C site, C(5) is bonded in a distorted trigonal planar geometry to one C(4), one C(6), and one N(1) atom. The C(5)-C(6) bond length is 1.39 Å. The C(5)-N(1) bond length is 1.40 Å. In the sixth C site, C(6) is bonded in a distorted single-bond geometry to one C(1), one C(5), and one H(5) atom. The C(6)-H(5) bond length is 0.93 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(1), one O(3), and one O(4) atom. The C(7)-O(3) bond length is 1.25 Å. The C(7)-O(4) bond length is 1.25 Å. In the eighth C site, C(8) is bonded in a bent 120 degrees geometry to one C(3), one O(1), and one O(2) atom. The C(8)-O(1) bond length is 1.25 Å. The C(8)-O(2) bond length is 1.27 Å. N(1) is bonded in a trigonal planar geometry to one C(5) and two equivalent H(1,2) atoms. Both N(1)-H(1,2) bond lengths are 0.86 Å. There are four inequivalent H sites. In the first H site, H(1,2) is bonded in a single-bond geometry to one N(1) atom. In the second H site, H(3) is bonded in a single-bond geometry to one C(2) 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(5) is bonded in a single-bond geometry to one C(6) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Mn(1) and one C(8) atom. In the second O site, O(4) is bonded in a bent 150 degrees geometry to one Mn(1) and one C(7) atom. In the third O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Mn(1) and one C(8) atom. In the fourth O site, O(3) is bonded in a bent 150 degrees geometry to one Mn(1) and one C(7) atom. Linkers: 4 Nc1cc(C([O])=O)cc(C([O])=O)c1. Metal clusters: 4 [Mn]. The MOF has largest included sphere 5.36 A, density 1.21 g/cm3, surface area 3996.40 m2/g, accessible volume 0.44 cm3/g