Eu3C9H3O13 crystallizes in the monoclinic P2_1 space group. There are three inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 9-coordinate geometry to one O(3), one O(9), two equivalent O(4), two equivalent O(7), and three equivalent O(1) atoms. The Eu(1)-O(3) bond length is 2.42 Å. The Eu(1)-O(9) bond length is 2.26 Å. There is one shorter (2.42 Å) and one longer (2.50 Å) Eu(1)-O(4) bond length. There is one shorter (2.52 Å) and one longer (2.58 Å) Eu(1)-O(7) bond length. There are a spread of Eu(1)-O(1) bond distances ranging from 2.35-2.52 Å. In the second Eu site, Eu(2) is bonded in a 9-coordinate geometry to one O(2), one O(4), one O(8), two equivalent O(12), two equivalent O(3), and two equivalent O(5) atoms. The Eu(2)-O(2) bond length is 2.41 Å. The Eu(2)-O(4) bond length is 2.47 Å. The Eu(2)-O(8) bond length is 2.91 Å. There is one shorter (2.62 Å) and one longer (2.84 Å) Eu(2)-O(12) bond length. There is one shorter (2.50 Å) and one longer (2.52 Å) Eu(2)-O(3) bond length. There is one shorter (2.39 Å) and one longer (2.42 Å) Eu(2)-O(5) bond length. In the third Eu site, Eu(3) is bonded in a 9-coordinate geometry to one O(10), one O(5), two equivalent O(2), two equivalent O(6), and three equivalent O(11) atoms. The Eu(3)-O(10) bond length is 2.44 Å. The Eu(3)-O(5) bond length is 2.56 Å. Both Eu(3)-O(2) bond lengths are 2.36 Å. There is one shorter (2.36 Å) and one longer (2.66 Å) Eu(3)-O(6) bond length. There are two shorter (2.45 Å) and one longer (2.48 Å) Eu(3)-O(11) bond length. There are nine inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal planar geometry to one C(7), one C(8), and one H(1) atom. The C(1)-C(7) bond length is 1.42 Å. The C(1)-C(8) bond length is 1.37 Å. The C(1)-H(1) bond length is 1.14 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one C(8), one O(10), and one O(6) atom. The C(2)-C(8) bond length is 1.46 Å. The C(2)-O(10) bond length is 1.29 Å. The C(2)-O(6) bond length is 1.30 Å. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one C(7), one O(13), and one O(9) atom. The C(3)-C(7) bond length is 1.57 Å. The C(3)-O(13) bond length is 1.31 Å. The C(3)-O(9) bond length is 1.18 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(5), one C(6), and one C(9) atom. The C(4)-C(5) bond length is 1.34 Å. The C(4)-C(6) bond length is 1.52 Å. The C(4)-C(9) bond length is 1.37 Å. In the fifth C site, C(5) is bonded in a distorted trigonal planar geometry to one C(4), one C(8), and one H(2) atom. The C(5)-C(8) bond length is 1.41 Å. The C(5)-H(2) bond length is 1.14 Å. In the sixth C site, C(6) is bonded in a distorted single-bond geometry to one C(4), one C(7), and one H(3) atom. The C(6)-C(7) bond length is 1.38 Å. The C(6)-H(3) bond length is 1.14 Å. In the seventh C site, C(7) is bonded in a trigonal non-coplanar geometry to one C(1), one C(3), and one C(6) atom. In the eighth C site, C(8) is bonded in a trigonal planar geometry to one C(1), one C(2), and one C(5) atom. In the ninth C site, C(9) is bonded in a distorted water-like geometry to one C(4), one O(12), and one O(8) atom. The C(9)-O(12) bond length is 1.37 Å. The C(9)-O(8) bond length is 1.32 Å. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(5) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(6) atom. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded in a trigonal non-coplanar geometry to three equivalent Eu(1) atoms. In the second O site, O(2) is bonded in a trigonal non-coplanar geometry to one Eu(2) and two equivalent Eu(3) atoms. In the third O site, O(3) is bonded in a trigonal non-coplanar geometry to one Eu(1) and two equivalent Eu(2) atoms. In the fourth O site, O(4) is bonded in a trigonal non-coplanar geometry to one Eu(2) and two equivalent Eu(1) atoms. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Eu(3) and two equivalent Eu(2) atoms. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to two equivalent Eu(3) and one C(2) atom. In the seventh O site, O(7) is bonded in an L-shaped geometry to two equivalent Eu(1) atoms. In the eighth O site, O(8) is bonded in a single-bond geometry to one Eu(2) and one C(9) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one Eu(1) and one C(3) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one Eu(3) and one C(2) atom. In the eleventh O site, O(11) is bonded in a trigonal non-coplanar geometry to three equivalent Eu(3) atoms. In the twelfth O site, O(12) is bonded in a distorted single-bond geometry to two equivalent Eu(2) and one C(9) atom. In the thirteenth O site, O(13) is bonded in a single-bond geometry to one C(3) atom. Linkers: 2 [O][C]([O])[C]1[CH][C](C([O])=O)[CH][C](C([O])=O)[CH]1. Metal clusters: 6 [Eu]. The MOF has largest included sphere 3.95 A, density 3.19 g/cm3, surface area 1472.11 m2/g, accessible volume 0.07 cm3/g