Eu3H28(C3O)20(CH3)4 crystallizes in the monoclinic P2_1/c space group. The structure consists of eight 02329_fluka molecules inside a Eu3H28(C3O)20 framework. In the Eu3H28(C3O)20 framework, there are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 7-coordinate geometry to one O(1), one O(3), one O(6), one O(8), one O(9), and two equivalent O(2) atoms. The Eu(1)-O(1) bond length is 2.39 Å. The Eu(1)-O(3) bond length is 2.32 Å. The Eu(1)-O(6) bond length is 2.32 Å. The Eu(1)-O(8) bond length is 2.33 Å. The Eu(1)-O(9) bond length is 2.33 Å. There is one shorter (2.39 Å) and one longer (2.75 Å) Eu(1)-O(2) bond length. In the second Eu site, Eu(2) is bonded in a square co-planar geometry to two equivalent O(4) and two equivalent O(7) atoms. Both Eu(2)-O(4) bond lengths are 2.27 Å. Both Eu(2)-O(7) bond lengths are 2.22 Å. There are thirty inequivalent C sites. In the first C site, C(1) is bonded in a bent 120 degrees geometry to one C(2), one O(1), and one O(2) atom. The C(1)-C(2) bond length is 1.51 Å. The C(1)-O(1) bond length is 1.27 Å. The C(1)-O(2) bond length is 1.29 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(7) atom. The C(2)-C(3) bond length is 1.40 Å. The C(2)-C(7) bond length is 1.39 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(2) and one H(1) atom. The C(3)-H(1) bond length is 0.95 Å. In the fourth C site, C(4) is bonded in a single-bond geometry to one C(5) and one H(2) atom. The C(4)-C(5) bond length is 1.42 Å. The C(4)-H(2) bond length is 0.95 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(12), one C(4), and one C(6) atom. The C(5)-C(12) 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 trigonal planar geometry to one C(15), one C(5), and one C(7) atom. The C(6)-C(15) bond length is 1.55 Å. The C(6)-C(7) bond length is 1.40 Å. In the seventh C site, C(7) is bonded in a distorted single-bond geometry to one C(2), one C(6), and one H(3) atom. The C(7)-H(3) bond length is 0.95 Å. In the eighth C site, C(8) is bonded in a bent 120 degrees geometry to one C(9), one O(3), and one O(4) atom. The C(8)-C(9) bond length is 1.49 Å. The C(8)-O(3) bond length is 1.23 Å. The C(8)-O(4) bond length is 1.23 Å. In the ninth C site, C(9) is bonded in a trigonal planar geometry to one C(10), one C(14), and one C(8) atom. The C(9)-C(10) bond length is 1.36 Å. The C(9)-C(14) bond length is 1.42 Å. In the tenth C site, C(10) is bonded in a distorted trigonal planar geometry to one C(11), one C(9), and one H(4) atom. The C(10)-C(11) bond length is 1.44 Å. The C(10)-H(4) bond length is 0.95 Å. In the eleventh C site, C(11) is bonded in a distorted single-bond geometry to one C(10), one C(12), and one H(5) atom. The C(11)-C(12) bond length is 1.31 Å. The C(11)-H(5) bond length is 0.95 Å. In the twelfth C site, C(12) is bonded in a trigonal planar geometry to one C(11), one C(13), and one C(5) atom. The C(12)-C(13) bond length is 1.40 Å. In the thirteenth C site, C(13) is bonded in a trigonal planar geometry to one C(12), one C(14), and one C(15) atom. The C(13)-C(14) bond length is 1.34 Å. The C(13)-C(15) bond length is 1.60 Å. In the fourteenth C site, C(14) is bonded in a distorted single-bond geometry to one C(13), one C(9), and one H(6) atom. The C(14)-H(6) bond length is 0.95 Å. In the fifteenth C site, C(15) is bonded in a distorted single-bond geometry to one C(13), one C(6), and one O(5) atom. The C(15)-O(5) bond length is 1.33 Å. In the sixteenth C site, C(17) is bonded in a distorted bent 120 degrees geometry to one C(18), one O(6), and one O(7) atom. The C(17)-C(18) bond length is 1.48 Å. The C(17)-O(6) bond length is 1.25 Å. The C(17)-O(7) bond length is 1.27 Å. In the seventeenth C site, C(18) is bonded in a trigonal planar geometry to one C(17), one C(19), and one C(23) atom. The C(18)-C(19) bond length is 1.36 Å. The C(18)-C(23) bond length is 1.39 Å. In the eighteenth C site, C(19) is bonded in a distorted single-bond geometry to one C(18) and one H(10) atom. The C(19)-H(10) bond length is 0.95 Å. In the nineteenth C site, C(20) is bonded in a distorted single-bond geometry to one C(21) and one H(11) atom. The C(20)-C(21) bond length is 1.35 Å. The C(20)-H(11) bond length is 0.95 Å. In the twentieth C site, C(21) is bonded in a trigonal planar geometry to one C(20), one C(22), and one C(28) atom. The C(21)-C(22) bond length is 1.44 Å. The C(21)-C(28) bond length is 1.45 Å. In the twenty-first C site, C(22) is bonded in a trigonal planar geometry to one C(21), one C(23), and one C(31) atom. The C(22)-C(23) bond length is 1.36 Å. The C(22)-C(31) bond length is 1.52 Å. In the twenty-second C site, C(23) is bonded in a distorted single-bond geometry to one C(18), one C(22), and one H(12) atom. The C(23)-H(12) bond length is 0.95 Å. In the twenty-third C site, C(24) is bonded in a bent 120 degrees geometry to one C(25), one O(8), and one O(9) atom. The C(24)-C(25) bond length is 1.50 Å. The C(24)-O(8) bond length is 1.27 Å. The C(24)-O(9) bond length is 1.29 Å. In the twenty-fourth C site, C(25) is bonded in a trigonal planar geometry to one C(24), one C(26), and one C(30) atom. The C(25)-C(26) bond length is 1.41 Å. The C(25)-C(30) bond length is 1.34 Å. In the twenty-fifth C site, C(26) is bonded in a distorted single-bond geometry to one C(25) and one H(13) atom. The C(26)-H(13) bond length is 0.95 Å. In the twenty-sixth C site, C(27) is bonded in a distorted single-bond geometry to one C(28) and one H(14) atom. The C(27)-C(28) bond length is 1.40 Å. The C(27)-H(14) bond length is 0.95 Å. In the twenty-seventh C site, C(28) is bonded in a trigonal planar geometry to one C(21), one C(27), and one C(29) atom. The C(28)-C(29) bond length is 1.37 Å. In the twenty-eighth C site, C(29) is bonded in a trigonal planar geometry to one C(28), one C(30), and one C(31) atom. The C(29)-C(30) bond length is 1.42 Å. The C(29)-C(31) bond length is 1.45 Å. In the twenty-ninth C site, C(30) is bonded in a distorted single-bond geometry to one C(25), one C(29), and one H(15) atom. The C(30)-H(15) bond length is 0.95 Å. In the thirtieth C site, C(31) is bonded in a distorted single-bond geometry to one C(22), one C(29), and one O(10) atom. The C(31)-O(10) bond length is 1.37 Å. There are fourteen inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(3) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(4) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(7) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(10) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(11) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(14) atom. In the seventh H site, H(10) is bonded in a single-bond geometry to one C(19) atom. In the eighth H site, H(11) is bonded in a single-bond geometry to one C(20) atom. In the ninth H site, H(12) is bonded in a single-bond geometry to one C(23) atom. In the tenth H site, H(13) is bonded in a single-bond geometry to one C(26) atom. In the eleventh H site, H(14) is bonded in a single-bond geometry to one C(27) atom. In the twelfth H site, H(15) is bonded in a single-bond geometry to one C(30) atom. In the thirteenth H site, H(19) is bonded in a single-bond geometry to one O(5) atom. The H(19)-O(5) bond length is 0.98 Å. In the fourteenth H site, H(20) is bonded in a single-bond geometry to one O(10) atom. The H(20)-O(10) bond length is 0.96 Å. There are ten inequivalent O sites. In the first O site, O(10) is bonded in a distorted single-bond geometry to one C(31) and one H(20) atom. In the second O site, O(1) is bonded in a water-like geometry to one Eu(1) and one C(1) atom. In the third O site, O(8) is bonded in a distorted bent 150 degrees geometry to one Eu(1) and one C(24) atom. In the fourth O site, O(2) is bonded in a 2-coordinate geometry to two equivalent Eu(1) and one C(1) atom. In the fifth O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Eu(1) and one C(8) atom. In the sixth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Eu(2) and one C(8) atom. In the seventh O site, O(5) is bonded in a bent 120 degrees geometry to one C(15) and one H(19) atom. In the eighth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Eu(1) and one C(17) atom. In the ninth O site, O(9) is bonded in a distorted bent 150 degrees geometry to one Eu(1) and one C(24) atom. In the tenth O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Eu(2) and one C(17) atom. Linkers: 8 CC1(O)c2cc(C([O])=O)ccc2-c2ccc(C([O])=O)cc21. Metal clusters: 6 [Eu]. The MOF has largest included sphere 9.87 A, density 1.00 g/cm3, surface area 3784.27 m2/g, accessible volume 0.52 cm3/g