ZrCdH6(C2O5)3 crystallizes in the monoclinic P2_1/c space group. Zr(1) is bonded in a 8-coordinate geometry to one O(10), one O(13), one O(14), one O(15), one O(2), one O(3), one O(5), and one O(7) atom. The Zr(1)-O(10) bond length is 2.26 Å. The Zr(1)-O(13) bond length is 2.19 Å. The Zr(1)-O(14) bond length is 2.27 Å. The Zr(1)-O(15) bond length is 2.22 Å. The Zr(1)-O(2) bond length is 2.18 Å. The Zr(1)-O(3) bond length is 2.23 Å. The Zr(1)-O(5) bond length is 2.18 Å. The Zr(1)-O(7) bond length is 2.22 Å. Cd(1) is bonded in a 6-coordinate geometry to one O(1), one O(12), one O(4), one O(6), one O(8), and one O(9) atom. The Cd(1)-O(1) bond length is 2.41 Å. The Cd(1)-O(12) bond length is 2.26 Å. The Cd(1)-O(4) bond length is 2.42 Å. The Cd(1)-O(6) bond length is 2.36 Å. The Cd(1)-O(8) bond length is 2.42 Å. The Cd(1)-O(9) bond length is 2.38 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 O(1) and one O(2) atom. The C(1)-O(1) bond length is 1.24 Å. The C(1)-O(2) bond length is 1.28 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one O(3) and one O(4) atom. The C(2)-O(3) bond length is 1.28 Å. The C(2)-O(4) bond length is 1.26 Å. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one O(5) and one O(6) atom. The C(3)-O(5) bond length is 1.29 Å. The C(3)-O(6) bond length is 1.24 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one O(7) and one O(8) atom. The C(4)-O(7) bond length is 1.30 Å. The C(4)-O(8) bond length is 1.24 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one O(10) and one O(11) atom. The C(5)-O(10) bond length is 1.30 Å. The C(5)-O(11) bond length is 1.24 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one O(12) and one O(13) atom. The C(6)-O(12) bond length is 1.25 Å. The C(6)-O(13) bond length is 1.28 Å. There are six 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 0.99 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(9) atom. The H(2)-O(9) bond length is 0.99 Å. In the third H site, H(3) is bonded in a linear geometry to one O(14) and one O(4) atom. The H(3)-O(14) bond length is 1.01 Å. The H(3)-O(4) bond length is 1.61 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(14) atom. The H(4)-O(14) bond length is 0.97 Å. In the fifth H site, H(5) is bonded in a distorted single-bond geometry to one O(10) and one O(15) atom. The H(5)-O(10) bond length is 1.71 Å. The H(5)-O(15) bond length is 1.00 Å. In the sixth H site, H(6) is bonded in a single-bond geometry to one O(15) atom. The H(6)-O(15) bond length is 0.98 Å. There are fifteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Cd(1) and one C(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Zr(1) and one C(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Zr(1) and one C(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Cd(1), one C(2), and one H(3) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Zr(1) and one C(3) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Cd(1) and one C(3) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Zr(1) and one C(4) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Cd(1) and one C(4) atom. In the ninth O site, O(9) is bonded in a distorted water-like geometry to one Cd(1), one H(1), and one H(2) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Zr(1), one C(5), and one H(5) atom. In the eleventh O site, O(11) is bonded in a single-bond geometry to one C(5) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Cd(1) and one C(6) atom. In the thirteenth O site, O(13) is bonded in a bent 120 degrees geometry to one Zr(1) and one C(6) atom. In the fourteenth O site, O(14) is bonded in a distorted water-like geometry to one Zr(1), one H(3), and one H(4) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal planar geometry to one Zr(1), one H(5), and one H(6) atom. Linkers: 12 [O]C(=O)C([O])=O. Metal clusters: 4 [Zr] ,4 [Cd]. RCSR code: hcb. The MOF has largest included sphere 2.90 A, density 2.42 g/cm3, surface area 2667.59 m2/g, accessible volume 0.08 cm3/g