FeC8H4O5 crystallizes in the triclinic P-1 space group. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(10), one O(2), one O(4), one O(5), and one O(8) atom to form corner-sharing FeO6 octahedra. The corner-sharing octahedral tilt angles are 50°. The Fe(1)-O(1) bond length is 1.75 Å. The Fe(1)-O(10) bond length is 2.19 Å. The Fe(1)-O(2) bond length is 1.83 Å. The Fe(1)-O(4) bond length is 2.18 Å. The Fe(1)-O(5) bond length is 1.93 Å. The Fe(1)-O(8) bond length is 1.95 Å. In the second Fe site, Fe(2) is bonded to one O(1), one O(2), one O(3), one O(6), one O(7), and one O(9) atom to form corner-sharing FeO6 octahedra. The corner-sharing octahedral tilt angles are 50°. The Fe(2)-O(1) bond length is 1.84 Å. The Fe(2)-O(2) bond length is 1.75 Å. The Fe(2)-O(3) bond length is 1.94 Å. The Fe(2)-O(6) bond length is 2.21 Å. The Fe(2)-O(7) bond length is 2.17 Å. The Fe(2)-O(9) bond length is 1.93 Å. There are sixteen inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one C(2), one C(3), and one C(4) atom. The C(1)-C(2) bond length is 1.40 Å. The C(1)-C(3) bond length is 1.40 Å. The C(1)-C(4) bond length is 1.49 Å. In the second C site, C(2) is bonded in a distorted trigonal planar geometry to one C(1), one C(3), and one H(1) atom. The C(2)-C(3) bond length is 1.39 Å. The C(2)-H(1) bond length is 1.09 Å. In the third C site, C(3) is bonded in a distorted trigonal planar geometry to one C(1), one C(2), and one H(2) atom. The C(3)-H(2) bond length is 1.09 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one C(1), one O(3), and one O(4) atom. The C(4)-O(3) bond length is 1.29 Å. The C(4)-O(4) bond length is 1.26 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(10), one C(11), and one C(6) atom. The C(5)-C(10) bond length is 1.40 Å. The C(5)-C(11) bond length is 1.49 Å. The C(5)-C(6) bond length is 1.40 Å. In the sixth C site, C(6) is bonded in a distorted trigonal planar geometry to one C(5), one C(7), and one H(3) atom. The C(6)-C(7) bond length is 1.39 Å. The C(6)-H(3) bond length is 1.09 Å. In the seventh C site, C(7) is bonded in a distorted trigonal planar geometry to one C(6), one C(8), and one H(4) atom. The C(7)-C(8) bond length is 1.40 Å. The C(7)-H(4) bond length is 1.09 Å. In the eighth C site, C(8) is bonded in a trigonal planar geometry to one C(12), one C(7), and one C(9) atom. The C(8)-C(12) bond length is 1.49 Å. The C(8)-C(9) bond length is 1.40 Å. In the ninth C site, C(9) is bonded in a distorted trigonal planar geometry to one C(10), one C(8), and one H(5) atom. The C(9)-C(10) bond length is 1.39 Å. The C(9)-H(5) bond length is 1.09 Å. In the tenth C site, C(10) is bonded in a distorted trigonal planar geometry to one C(5), one C(9), and one H(6) atom. The C(10)-H(6) bond length is 1.09 Å. In the eleventh C site, C(11) is bonded in a distorted bent 120 degrees geometry to one C(5), one O(5), and one O(6) atom. The C(11)-O(5) bond length is 1.30 Å. The C(11)-O(6) bond length is 1.26 Å. In the twelfth C site, C(12) is bonded in a distorted bent 120 degrees geometry to one C(8), one O(7), and one O(8) atom. The C(12)-O(7) bond length is 1.26 Å. The C(12)-O(8) bond length is 1.29 Å. In the thirteenth C site, C(13) is bonded in a trigonal planar geometry to one C(14), one C(15), and one C(16) atom. The C(13)-C(14) bond length is 1.40 Å. The C(13)-C(15) bond length is 1.40 Å. The C(13)-C(16) bond length is 1.49 Å. In the fourteenth C site, C(14) is bonded in a distorted trigonal planar geometry to one C(13), one C(15), and one H(7) atom. The C(14)-C(15) bond length is 1.39 Å. The C(14)-H(7) bond length is 1.09 Å. In the fifteenth C site, C(15) is bonded in a distorted trigonal planar geometry to one C(13), one C(14), and one H(8) atom. The C(15)-H(8) bond length is 1.09 Å. In the sixteenth C site, C(16) is bonded in a distorted bent 120 degrees geometry to one C(13), one O(10), and one O(9) atom. The C(16)-O(10) bond length is 1.26 Å. The C(16)-O(9) bond length is 1.30 Å. There are eight inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(2) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(3) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(6) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(7) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(9) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(10) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(14) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(15) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Fe(1) and one Fe(2) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Fe(1) and one Fe(2) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Fe(2) and one C(4) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Fe(1) and one C(4) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Fe(1) and one C(11) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Fe(2) and one C(11) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Fe(2) and one C(12) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Fe(1) and one C(12) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one Fe(2) and one C(16) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Fe(1) and one C(16) atom. Linkers: 4 [O]C(=O)c1ccc(C([O])=O)cc1. Metal clusters: 4 [Fe]. RCSR code: lvt. The MOF has largest included sphere 2.32 A, density 1.90 g/cm3, surface area 3392.23 m2/g, accessible volume 0.11 cm3/g