SmZnC12N4H9O9 crystallizes in the monoclinic P2_1/c space group. Sm(1) is bonded in a distorted pentagonal bipyramidal geometry to one N(3), one O(2), one O(3), one O(5), one O(6), one O(7), and one O(8) atom. The Sm(1)-N(3) bond length is 2.68 Å. The Sm(1)-O(2) bond length is 2.29 Å. The Sm(1)-O(3) bond length is 2.33 Å. The Sm(1)-O(5) bond length is 2.36 Å. The Sm(1)-O(6) bond length is 2.33 Å. The Sm(1)-O(7) bond length is 2.39 Å. The Sm(1)-O(8) bond length is 2.34 Å. Zn(1) is bonded in a trigonal bipyramidal geometry to one N(1), one N(2), one O(1), one O(4), and one O(9) atom. The Zn(1)-N(1) bond length is 2.00 Å. The Zn(1)-N(2) bond length is 2.00 Å. The Zn(1)-O(1) bond length is 2.12 Å. The Zn(1)-O(4) bond length is 2.23 Å. The Zn(1)-O(9) bond length is 2.04 Å. There are twelve inequivalent C sites. In the first C site, C(1) is bonded in a distorted single-bond geometry to one C(2), one C(4), and one N(1) atom. The C(1)-C(2) bond length is 1.40 Å. The C(1)-C(4) bond length is 1.49 Å. The C(1)-N(1) bond length is 1.38 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(1), one C(5), and one N(2) atom. The C(2)-C(5) bond length is 1.47 Å. The C(2)-N(2) bond length is 1.38 Å. In the third C site, C(3) is bonded in a distorted trigonal planar geometry to one C(6), one N(1), and one N(2) atom. The C(3)-C(6) bond length is 1.48 Å. The C(3)-N(1) bond length is 1.35 Å. The C(3)-N(2) bond length is 1.35 Å. In the fourth C site, C(4) is bonded in a bent 120 degrees geometry to one C(1), one O(1), and one O(2) atom. The C(4)-O(1) bond length is 1.27 Å. The C(4)-O(2) bond length is 1.27 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(3), and one O(4) atom. The C(5)-O(3) bond length is 1.27 Å. The C(5)-O(4) bond length is 1.29 Å. In the sixth C site, C(6) is bonded in a distorted trigonal non-coplanar geometry to one C(3), one H(4), one H(5), and one H(6) atom. The C(6)-H(4) bond length is 1.10 Å. The C(6)-H(5) bond length is 1.10 Å. The C(6)-H(6) bond length is 1.09 Å. In the seventh C site, C(7) is bonded in a distorted trigonal planar geometry to one C(10), one C(8), and one N(3) atom. The C(7)-C(10) bond length is 1.49 Å. The C(7)-C(8) bond length is 1.39 Å. The C(7)-N(3) bond length is 1.38 Å. In the eighth C site, C(8) is bonded in a distorted single-bond geometry to one C(11), one C(7), and one N(4) atom. The C(8)-C(11) bond length is 1.48 Å. The C(8)-N(4) bond length is 1.38 Å. In the ninth C site, C(9) is bonded in a distorted trigonal planar geometry to one C(12), one N(3), and one N(4) atom. The C(9)-C(12) bond length is 1.48 Å. The C(9)-N(3) bond length is 1.34 Å. The C(9)-N(4) bond length is 1.36 Å. In the tenth C site, C(10) is bonded in a distorted bent 120 degrees geometry to one C(7), one O(5), and one O(6) atom. The C(10)-O(5) bond length is 1.27 Å. The C(10)-O(6) bond length is 1.26 Å. In the eleventh C site, C(11) is bonded in a distorted bent 120 degrees geometry to one C(8), one O(7), and one O(8) atom. The C(11)-O(7) bond length is 1.26 Å. The C(11)-O(8) bond length is 1.28 Å. In the twelfth C site, C(12) is bonded in a distorted trigonal non-coplanar geometry to one C(9), one H(7), one H(8), and one H(9) atom. The C(12)-H(7) bond length is 1.10 Å. The C(12)-H(8) bond length is 1.09 Å. The C(12)-H(9) bond length is 1.10 Å. There are four inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal planar geometry to one Zn(1), one C(1), and one C(3) atom. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one Zn(1), one C(2), and one C(3) atom. In the third N site, N(3) is bonded in a distorted water-like geometry to one Sm(1), one C(7), and one C(9) atom. In the fourth N site, N(4) is bonded in a distorted trigonal planar geometry to one C(8), one C(9), and one H(3) atom. The N(4)-H(3) bond length is 1.02 Å. There are nine inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(9) atom. The H(1)-O(9) bond length is 0.98 Å. In the second H site, H(2) is bonded in a distorted linear geometry to one O(4) and one O(9) atom. The H(2)-O(4) bond length is 1.62 Å. The H(2)-O(9) bond length is 1.02 Å. In the third H site, H(3) is bonded in a single-bond geometry to one N(4) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(6) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(6) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(6) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(12) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(12) atom. In the ninth H site, H(9) is bonded in a single-bond geometry to one C(12) atom. There are nine inequivalent O sites. In the first O site, O(6) is bonded in a bent 150 degrees geometry to one Sm(1) and one C(10) atom. In the second O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Sm(1) and one C(11) atom. In the third O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Sm(1) and one C(11) atom. In the fourth O site, O(9) is bonded in a distorted water-like geometry to one Zn(1), one H(1), and one H(2) atom. In the fifth O site, O(1) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(4) atom. In the sixth O site, O(2) is bonded in a bent 150 degrees geometry to one Sm(1) and one C(4) atom. In the seventh O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Sm(1) and one C(5) atom. In the eighth O site, O(4) is bonded in a 3-coordinate geometry to one Zn(1), one C(5), and one H(2) atom. In the ninth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Sm(1) and one C(10) atom. Linkers: 3 CC1=NC(C([O])=O)=C(C([O])=O)[N]1 ,3 Cc1nc(C([O])=O)c(C([O])=O)[nH]1 ,1 CC1=N[C](C([O])=O)C(C([O])=O)=N1. Metal clusters: 4 [Sm] ,4 [Zn]. The MOF has largest included sphere 3.38 A, density 2.15 g/cm3, surface area 3059.05 m2/g, accessible volume 0.13 cm3/g