Cr3Zn3C54N6H30O25 crystallizes in the hexagonal P-62m space group. Cr(1) is bonded to one O(2) and four equivalent O(1) atoms to form corner-sharing CrO5 square pyramids. The Cr(1)-O(2) bond length is 1.92 Å. All Cr(1)-O(1) bond lengths are 1.97 Å. Zn(1) is bonded in a tetrahedral geometry to two equivalent N(1) and two equivalent O(4) atoms. Both Zn(1)-N(1) bond lengths are 2.05 Å. Both Zn(1)-O(4) bond lengths are 1.95 Å. There are seven inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal planar geometry to one C(2), one C(7), and one H(1) atom. The C(1)-C(2) bond length is 1.34 Å. The C(1)-C(7) bond length is 1.38 Å. The C(1)-H(1) bond length is 0.94 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one C(1), one N(1), and one H(2) atom. The C(2)-N(1) bond length is 1.33 Å. The C(2)-H(2) bond length is 0.94 Å. In the third C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(7) and two equivalent O(1) atoms. The C(6)-C(7) bond length is 1.50 Å. Both C(6)-O(1) bond lengths are 1.25 Å. In the fourth C site, C(7) is bonded in a trigonal planar geometry to one C(6) and two equivalent C(1) atoms. In the fifth C site, C(5) is bonded in a distorted single-bond geometry to two equivalent C(4) and one H(3) atom. Both C(5)-C(4) bond lengths are 1.39 Å. The C(5)-H(3) bond length is 0.94 Å. In the sixth C site, C(3) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(3), and one O(4) atom. The C(3)-C(4) bond length is 1.51 Å. The C(3)-O(3) bond length is 1.22 Å. The C(3)-O(4) bond length is 1.27 Å. In the seventh C site, C(4) is bonded in a trigonal planar geometry to one C(3) and two equivalent C(5) atoms. N(1) is bonded in a trigonal planar geometry to one Zn(1) and two equivalent C(2) atoms. 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(2) is bonded in a single-bond geometry to one C(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(5) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Cr(1) and one C(6) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to three equivalent Cr(1) atoms. In the third O site, O(3) is bonded in a single-bond geometry to one C(3) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(3) atom. 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Metal clusters: 1 [C]1O[Cr]23O[C]O[Cr]45(O1)O[C]O[Cr](O[C]O2)(O[C]O3)(O[C]O4)O5. RCSR code: acs. The MOF has largest included sphere 10.19 A, density 0.70 g/cm3, surface area 3932.71 m2/g, accessible volume 0.93 cm3/g