EuH6(C5O2)3(CH)3 crystallizes in the tetragonal I4_1cd space group. The structure consists of ninety-six 02329_fluka molecules inside a EuH6(C5O2)3 framework. In the EuH6(C5O2)3 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(12), one O(2), one O(3), one O(4), one O(7), and one O(9) atom. The Eu(1)-O(1) bond length is 2.59 Å. The Eu(1)-O(12) bond length is 2.44 Å. The Eu(1)-O(2) bond length is 2.40 Å. The Eu(1)-O(3) bond length is 2.59 Å. The Eu(1)-O(4) bond length is 2.40 Å. The Eu(1)-O(7) bond length is 2.46 Å. The Eu(1)-O(9) bond length is 2.33 Å. In the second Eu site, Eu(2) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(11), one O(12), one O(3), one O(5), one O(6), one O(7), and one O(8) atom. The Eu(2)-O(1) bond length is 2.42 Å. The Eu(2)-O(10) bond length is 2.35 Å. The Eu(2)-O(11) bond length is 2.48 Å. The Eu(2)-O(12) bond length is 2.58 Å. The Eu(2)-O(3) bond length is 2.45 Å. The Eu(2)-O(5) bond length is 2.50 Å. The Eu(2)-O(6) bond length is 2.40 Å. The Eu(2)-O(7) bond length is 2.69 Å. The Eu(2)-O(8) bond length is 2.47 Å. There are thirty inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one C(10), one C(11), and one C(2) atom. The C(1)-C(10) bond length is 1.42 Å. The C(1)-C(11) bond length is 1.49 Å. The C(1)-C(2) bond length is 1.36 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(1) and one H(1) atom. The C(2)-H(1) bond length is 0.93 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(4) and one H(2) atom. The C(3)-C(4) bond length is 1.37 Å. The C(3)-H(2) bond length is 0.93 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(12), one C(3), and one C(5) atom. The C(4)-C(12) bond length is 1.49 Å. The C(4)-C(5) bond length is 1.44 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(10), one C(4), and one C(6) atom. The C(5)-C(10) bond length is 1.44 Å. The C(5)-C(6) bond length is 1.42 Å. In the sixth C site, C(6) is bonded in a distorted single-bond geometry to one C(5) and one H(3) atom. The C(6)-H(3) bond length is 0.93 Å. In the seventh C site, C(9) is bonded in a distorted single-bond geometry to one C(10) and one H(6) atom. The C(9)-C(10) bond length is 1.41 Å. The C(9)-H(6) bond length is 0.93 Å. In the eighth C site, C(10) is bonded in a trigonal planar geometry to one C(1), one C(5), and one C(9) atom. In the ninth C site, C(11) is bonded in a distorted bent 120 degrees geometry to one C(1), one O(1), and one O(2) atom. The C(11)-O(1) bond length is 1.29 Å. The C(11)-O(2) bond length is 1.24 Å. In the tenth C site, C(12) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(3), and one O(4) atom. The C(12)-O(3) bond length is 1.29 Å. The C(12)-O(4) bond length is 1.25 Å. In the eleventh C site, C(13) is bonded in a trigonal planar geometry to one C(14), one C(22), and one C(23) atom. The C(13)-C(14) bond length is 1.38 Å. The C(13)-C(22) bond length is 1.43 Å. The C(13)-C(23) bond length is 1.50 Å. In the twelfth C site, C(14) is bonded in a distorted single-bond geometry to one C(13) and one H(7) atom. The C(14)-H(7) bond length is 0.93 Å. In the thirteenth C site, C(15) is bonded in a distorted single-bond geometry to one C(16) and one H(8) atom. The C(15)-C(16) bond length is 1.36 Å. The C(15)-H(8) bond length is 0.93 Å. In the fourteenth C site, C(16) is bonded in a trigonal planar geometry to one C(15), one C(17), and one C(24) atom. The C(16)-C(17) bond length is 1.40 Å. The C(16)-C(24) bond length is 1.52 Å. In the fifteenth C site, C(17) is bonded in a trigonal planar geometry to one C(16), one C(18), and one C(22) atom. The C(17)-C(18) bond length is 1.42 Å. The C(17)-C(22) bond length is 1.45 Å. In the sixteenth C site, C(18) is bonded in a distorted single-bond geometry to one C(17) and one H(9) atom. The C(18)-H(9) bond length is 0.93 Å. In the seventeenth C site, C(21) is bonded in a distorted single-bond geometry to one C(22) and one H(12) atom. The C(21)-C(22) bond length is 1.41 Å. The C(21)-H(12) bond length is 0.93 Å. In the eighteenth C site, C(22) is bonded in a trigonal planar geometry to one C(13), one C(17), and one C(21) atom. In the nineteenth C site, C(23) is bonded in a distorted bent 120 degrees geometry to one C(13), one O(5), and one O(6) atom. The C(23)-O(5) bond length is 1.27 Å. The C(23)-O(6) bond length is 1.28 Å. In the twentieth C site, C(24) is bonded in a bent 120 degrees geometry to one C(16), one O(7), and one O(8) atom. The C(24)-O(7) bond length is 1.25 Å. The C(24)-O(8) bond length is 1.24 Å. In the twenty-first C site, C(25) is bonded in a trigonal planar geometry to one C(26), one C(34), and one C(35) atom. The C(25)-C(26) bond length is 1.35 Å. The C(25)-C(34) bond length is 1.40 Å. The C(25)-C(35) bond length is 1.48 Å. In the twenty-second 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 0.93 Å. In the twenty-third 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 1.37 Å. The C(27)-H(14) bond length is 0.93 Å. In the twenty-fourth C site, C(28) is bonded in a trigonal planar geometry to one C(27), one C(29), and one C(36) atom. The C(28)-C(29) bond length is 1.45 Å. The C(28)-C(36) bond length is 1.49 Å. In the twenty-fifth C site, C(29) is bonded in a trigonal planar geometry to one C(28), one C(30), and one C(34) atom. The C(29)-C(30) bond length is 1.42 Å. The C(29)-C(34) bond length is 1.43 Å. In the twenty-sixth C site, C(30) is bonded in a distorted single-bond geometry to one C(29) and one H(15) atom. The C(30)-H(15) bond length is 0.93 Å. In the twenty-seventh C site, C(33) is bonded in a distorted single-bond geometry to one C(34) and one H(18) atom. The C(33)-C(34) bond length is 1.41 Å. The C(33)-H(18) bond length is 0.93 Å. In the twenty-eighth C site, C(34) is bonded in a trigonal planar geometry to one C(25), one C(29), and one C(33) atom. In the twenty-ninth C site, C(35) is bonded in a bent 120 degrees geometry to one C(25), one O(10), and one O(9) atom. The C(35)-O(10) bond length is 1.24 Å. The C(35)-O(9) bond length is 1.26 Å. In the thirtieth C site, C(36) is bonded in a distorted bent 120 degrees geometry to one C(28), one O(11), and one O(12) atom. The C(36)-O(11) bond length is 1.24 Å. The C(36)-O(12) bond length is 1.26 Å. There are twelve 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(6) is bonded in a single-bond geometry to one C(9) atom. In the fifth H site, H(7) is bonded in a single-bond geometry to one C(14) atom. In the sixth H site, H(8) is bonded in a single-bond geometry to one C(15) atom. In the seventh H site, H(9) is bonded in a single-bond geometry to one C(18) atom. In the eighth H site, H(12) is bonded in a single-bond geometry to one C(21) atom. In the ninth H site, H(13) is bonded in a single-bond geometry to one C(26) atom. In the tenth H site, H(14) is bonded in a single-bond geometry to one C(27) atom. In the eleventh H site, H(15) is bonded in a single-bond geometry to one C(30) atom. In the twelfth H site, H(18) is bonded in a single-bond geometry to one C(33) atom. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Eu(1), one Eu(2), and one C(11) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Eu(1) and one C(11) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Eu(1), one Eu(2), and one C(12) atom. In the fourth O site, O(4) is bonded in a distorted water-like geometry to one Eu(1) and one C(12) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Eu(2) and one C(23) atom. In the sixth O site, O(6) is bonded in a distorted L-shaped geometry to one Eu(2) and one C(23) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Eu(1), one Eu(2), and one C(24) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Eu(2) and one C(24) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one Eu(1) and one C(35) atom. In the tenth O site, O(10) is bonded in a distorted bent 120 degrees geometry to one Eu(2) and one C(35) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to one Eu(2) and one C(36) atom. In the twelfth O site, O(12) is bonded in a distorted single-bond geometry to one Eu(1), one Eu(2), and one C(36) atom. Linkers: 24 [O]C(=O)c1ccc(C([O])=O)c2ccccc12. Metal clusters: 16 [Eu]. The MOF has largest included sphere 4.35 A, density 1.73 g/cm3, surface area 3183.78 m2/g, accessible volume 0.22 cm3/g