NaEuZnC26H10(NO4)2 crystallizes in the orthorhombic Imma space group. Na(1) is bonded in a tetrahedral geometry to two equivalent O(1) and two equivalent O(4) atoms. Both Na(1)-O(1) bond lengths are 2.32 Å. Both Na(1)-O(4) bond lengths are 2.17 Å. Eu(1) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Both Eu(1)-O(1) bond lengths are 2.51 Å. Both Eu(1)-O(2) bond lengths are 2.29 Å. Both Eu(1)-O(3) bond lengths are 2.47 Å. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a single-bond geometry to one Zn(2), two equivalent N(1), and two equivalent N(2) atoms. The Zn(1)-Zn(2) bond length is 0.73 Å. Both Zn(1)-N(1) bond lengths are 2.03 Å. Both Zn(1)-N(2) bond lengths are 2.08 Å. In the second Zn site, Zn(2) is bonded in a single-bond geometry to one Zn(1), two equivalent N(1), and two equivalent N(2) atoms. Both Zn(2)-N(1) bond lengths are 2.06 Å. Both Zn(2)-N(2) bond lengths are 2.08 Å. There are thirteen inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one C(5), one C(6), and one C(9) atom. The C(1)-C(5) bond length is 1.50 Å. The C(1)-C(6) bond length is 1.36 Å. The C(1)-C(9) bond length is 1.38 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(10), one C(5), and one H(1) atom. The C(2)-C(10) bond length is 1.39 Å. The C(2)-C(5) bond length is 1.40 Å. The C(2)-H(1) bond length is 0.95 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(4), one C(5), and one H(2) atom. The C(3)-C(4) bond length is 1.43 Å. The C(3)-C(5) bond length is 1.35 Å. The C(3)-H(2) bond length is 0.95 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(7) atom. The C(4)-C(12) bond length is 1.48 Å. The C(4)-C(7) bond length is 1.40 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(1), one C(2), and one C(3) atom. In the sixth C site, C(6) is bonded in a distorted trigonal planar geometry to one C(1), one C(8), and one N(2) atom. The C(6)-C(8) bond length is 1.46 Å. The C(6)-N(2) bond length is 1.39 Å. In the seventh C site, C(7) is bonded in a distorted single-bond geometry to one C(10), one C(4), and one H(3) atom. The C(7)-C(10) bond length is 1.39 Å. The C(7)-H(3) bond length is 0.95 Å. In the eighth C site, C(8) is bonded in a distorted single-bond geometry to one C(6) and one H(4) atom. The C(8)-H(4) bond length is 0.95 Å. In the ninth C site, C(9) is bonded in a distorted trigonal planar geometry to one C(1), one C(11), and one N(1) atom. The C(9)-C(11) bond length is 1.44 Å. The C(9)-N(1) bond length is 1.39 Å. In the tenth C site, C(10) is bonded in a trigonal planar geometry to one C(13), one C(2), and one C(7) atom. The C(10)-C(13) bond length is 1.47 Å. In the eleventh C site, C(11) is bonded in a distorted single-bond geometry to one C(9) and one H(5) atom. The C(11)-H(5) bond length is 0.95 Å. In the twelfth C site, C(12) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(1), and one O(3) atom. The C(12)-O(1) bond length is 1.22 Å. The C(12)-O(3) bond length is 1.26 Å. In the thirteenth C site, C(13) is bonded in a distorted bent 120 degrees geometry to one C(10), one O(2), and one O(4) atom. The C(13)-O(2) bond length is 1.19 Å. The C(13)-O(4) bond length is 1.25 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 4-coordinate geometry to one Zn(1), one Zn(2), and two equivalent C(9) atoms. In the second N site, N(2) is bonded in a 4-coordinate geometry to one Zn(1), one Zn(2), and two equivalent C(6) atoms. There are five 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(7) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(8) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(11) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Na(1), one Eu(1), and one C(12) atom. In the second O site, O(2) is bonded in a distorted linear geometry to one Eu(1) and one C(13) atom. In the third O site, O(3) is bonded in a single-bond geometry to one Eu(1) and one C(12) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Na(1) and one C(13) atom. Linkers: 4 [O]C(=O)c1cc(C([O])=O)cc(/C2=C3\C=C/C(=C(\c4cc(C([O])=O)cc(C([O])=O)c4)C4=N/C(=C(/c5cc(C([O])=O)cc(C([O])=O)c5)C5=CC=C([N]5)/C(c5cc(C([O])=O)cc(C([O])=O)c5)=C5/C=CC2=N5)C=C4)[N]3)c1. Metal clusters: 8 [Na] ,8 [Eu] ,4 [N][Zn]([N])[Zn]([N])[N]. The MOF has largest included sphere 9.98 A, density 0.92 g/cm3, surface area 3100.43 m2/g, accessible volume 0.71 cm3/g