NaEuMo6AlC6NH3O20CHCH3 crystallizes in the triclinic P-1 space group. The structure consists of two 02329_fluka molecules and two 02329_fluka molecules inside a NaEuMo6AlC6NH3O20 framework. In the NaEuMo6AlC6NH3O20 framework, Na(1) is bonded in a rectangular see-saw-like geometry to one O(12), one O(17), and two equivalent O(20) atoms. The Na(1)-O(12) bond length is 2.53 Å. The Na(1)-O(17) bond length is 2.37 Å. Both Na(1)-O(20) bond lengths are 2.40 Å. Eu(1) is bonded in a 7-coordinate geometry to one O(1), one O(12), one O(2), one O(4), one O(5), and two equivalent O(3) atoms. The Eu(1)-O(1) bond length is 2.37 Å. The Eu(1)-O(12) bond length is 2.54 Å. The Eu(1)-O(2) bond length is 2.36 Å. The Eu(1)-O(4) bond length is 2.47 Å. The Eu(1)-O(5) bond length is 2.43 Å. There is one shorter (2.35 Å) and one longer (2.54 Å) Eu(1)-O(3) bond length. There are six inequivalent Mo sites. In the first Mo site, Mo(1) is bonded in a 5-coordinate geometry to one O(5), one O(6), one O(7), one O(8), and one O(9) atom. The Mo(1)-O(5) bond length is 1.73 Å. The Mo(1)-O(6) bond length is 2.29 Å. The Mo(1)-O(7) bond length is 1.92 Å. The Mo(1)-O(8) bond length is 2.23 Å. The Mo(1)-O(9) bond length is 1.94 Å. In the second Mo site, Mo(2) is bonded in a 4-coordinate geometry to one O(10), one O(11), one O(6), and one O(7) atom. The Mo(2)-O(10) bond length is 2.27 Å. The Mo(2)-O(11) bond length is 1.90 Å. The Mo(2)-O(6) bond length is 2.30 Å. The Mo(2)-O(7) bond length is 1.91 Å. In the third Mo site, Mo(3) is bonded in a 4-coordinate geometry to one O(10), one O(11), one O(8), and one O(9) atom. The Mo(3)-O(10) bond length is 2.25 Å. The Mo(3)-O(11) bond length is 1.95 Å. The Mo(3)-O(8) bond length is 2.30 Å. The Mo(3)-O(9) bond length is 1.93 Å. In the fourth Mo site, Mo(4) is bonded in a 5-coordinate geometry to one O(13), one O(14), one O(15), one O(16), and one O(17) atom. The Mo(4)-O(13) bond length is 2.25 Å. The Mo(4)-O(14) bond length is 2.28 Å. The Mo(4)-O(15) bond length is 1.94 Å. The Mo(4)-O(16) bond length is 1.92 Å. The Mo(4)-O(17) bond length is 1.70 Å. In the fifth Mo site, Mo(5) is bonded in a 4-coordinate geometry to one O(14), one O(15), one O(18), and one O(19) atom. The Mo(5)-O(14) bond length is 2.28 Å. The Mo(5)-O(15) bond length is 1.94 Å. The Mo(5)-O(18) bond length is 2.29 Å. The Mo(5)-O(19) bond length is 1.89 Å. In the sixth Mo site, Mo(6) is bonded in a 4-coordinate geometry to one O(13), one O(16), one O(18), and one O(19) atom. The Mo(6)-O(13) bond length is 2.28 Å. The Mo(6)-O(16) bond length is 1.94 Å. The Mo(6)-O(18) bond length is 2.27 Å. The Mo(6)-O(19) bond length is 1.92 Å. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in an octahedral geometry to two equivalent O(10), two equivalent O(6), and two equivalent O(8) atoms. Both Al(1)-O(10) bond lengths are 1.91 Å. Both Al(1)-O(6) bond lengths are 1.89 Å. Both Al(1)-O(8) bond lengths are 1.89 Å. In the second Al site, Al(2) is bonded in an octahedral geometry to two equivalent O(13), two equivalent O(14), and two equivalent O(18) atoms. Both Al(2)-O(13) bond lengths are 1.89 Å. Both Al(2)-O(14) bond lengths are 1.90 Å. Both Al(2)-O(18) bond lengths are 1.88 Å. There are six inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one N(1) and one H(1) atom. The C(1)-N(1) bond length is 1.35 Å. The C(1)-H(1) bond length is 0.95 Å. In the second C site, C(3) is bonded in a distorted single-bond geometry to one C(4) and one H(3) atom. The C(3)-C(4) bond length is 1.39 Å. The C(3)-H(3) bond length is 0.95 Å. In the third C site, C(4) is bonded in a trigonal planar geometry to one C(3), one C(5), and one C(6) atom. The C(4)-C(5) bond length is 1.35 Å. The C(4)-C(6) bond length is 1.53 Å. In the fourth C site, C(5) is bonded in a distorted trigonal planar geometry to one C(4), one N(1), and one H(4) atom. The C(5)-N(1) bond length is 1.35 Å. The C(5)-H(4) bond length is 0.95 Å. In the fifth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(1), and one O(2) atom. The C(6)-O(1) bond length is 1.24 Å. The C(6)-O(2) bond length is 1.24 Å. In the sixth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one O(3) and one O(4) atom. The C(8)-O(3) bond length is 1.25 Å. The C(8)-O(4) bond length is 1.26 Å. N(1) is bonded in a bent 120 degrees geometry to one C(1) and one C(5) atom. 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(3) is bonded in a single-bond geometry to one C(3) atom. In the third H site, H(4) is bonded in a single-bond geometry to one C(5) atom. There are twenty inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Eu(1) and one C(6) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Eu(1) and one C(6) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to two equivalent Eu(1) and one C(8) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Eu(1) and one C(8) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Eu(1) and one Mo(1) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Mo(1), one Mo(2), and one Al(1) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Mo(1) and one Mo(2) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Mo(1), one Mo(3), and one Al(1) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one Mo(1) and one Mo(3) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one Mo(2), one Mo(3), and one Al(1) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Mo(2) and one Mo(3) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Na(1) and one Eu(1) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Mo(4), one Mo(6), and one Al(2) atom. In the fourteenth O site, O(14) is bonded in a distorted single-bond geometry to one Mo(4), one Mo(5), and one Al(2) atom. In the fifteenth O site, O(15) is bonded in a bent 120 degrees geometry to one Mo(4) and one Mo(5) atom. In the sixteenth O site, O(16) is bonded in a bent 120 degrees geometry to one Mo(4) and one Mo(6) atom. In the seventeenth O site, O(17) is bonded in a linear geometry to one Na(1) and one Mo(4) atom. In the eighteenth O site, O(18) is bonded in a distorted single-bond geometry to one Mo(5), one Mo(6), and one Al(2) atom. In the nineteenth O site, O(19) is bonded in a bent 120 degrees geometry to one Mo(5) and one Mo(6) atom. In the twentieth O site, O(20) is bonded in an L-shaped geometry to two equivalent Na(1) atoms. Linkers: 2 [O]C(=O)c1cccnc1 ,2 CC([O])=O. Metal clusters: 2 [Na] ,2 [Eu] ,2 [Al] ,12 [Mo]. The MOF has largest included sphere 6.62 A, density 1.82 g/cm3, surface area 2456.09 m2/g, accessible volume 0.32 cm3/g