(Hf3O4)4(IrC48N4H24(O4Cl)2)3 is Indium-derived structured and crystallizes in the cubic Im-3m space group. The structure is zero-dimensional and consists of eight Hf3O4 clusters and twelve IrC48N4H24(O4Cl)2 clusters. In each Hf3O4 cluster, Hf(1) is bonded in a 3-coordinate geometry to one O(3) and three equivalent O(2) atoms. The Hf(1)-O(3) bond length is 2.22 Å. There are two shorter (2.07 Å) and one longer (2.30 Å) Hf(1)-O(2) bond length. There are two inequivalent O sites. In the first O site, O(2) is bonded in a trigonal non-coplanar geometry to three equivalent Hf(1) atoms. In the second O site, O(3) is bonded in a trigonal non-coplanar geometry to three equivalent Hf(1) atoms. In each IrC48N4H24(O4Cl)2 cluster, Ir(1) is bonded in an octahedral geometry to four equivalent N(1) and two equivalent Cl(1) atoms. All Ir(1)-N(1) bond lengths are 2.00 Å. Both Ir(1)-Cl(1) bond lengths are 2.46 Å. There are eight inequivalent C sites. In the first C site, C(6) is bonded in a trigonal planar geometry to one C(5) and two equivalent C(3) atoms. The C(6)-C(5) bond length is 1.52 Å. Both C(6)-C(3) bond lengths are 1.34 Å. In the second C site, C(7) is bonded in a trigonal planar geometry to one C(8) and two equivalent C(4) atoms. The C(7)-C(8) bond length is 1.54 Å. Both C(7)-C(4) bond lengths are 1.36 Å. In the third C site, C(8) is bonded in a distorted bent 120 degrees geometry to one C(7) and two equivalent O(1) atoms. Both C(8)-O(1) bond lengths are 1.20 Å. In the fourth C site, C(5) is bonded in a trigonal planar geometry to one C(6) and two equivalent C(1) atoms. Both C(5)-C(1) bond lengths are 1.36 Å. In the fifth C site, C(1) is bonded in a distorted trigonal planar geometry to one C(2), one C(5), and one N(1) atom. The C(1)-C(2) bond length is 1.45 Å. The C(1)-N(1) bond length is 1.35 Å. In the sixth C site, C(2) is bonded in a distorted single-bond geometry to one C(1) and one H(1) atom. The C(2)-H(1) bond length is 0.95 Å. In the seventh C site, C(3) is bonded in a distorted single-bond geometry to one C(4), one C(6), and one H(2) atom. The C(3)-C(4) bond length is 1.40 Å. The C(3)-H(2) bond length is 0.95 Å. In the eighth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(3), one C(7), and one H(3) atom. The C(4)-H(3) bond length is 0.95 Å. N(1) is bonded in a trigonal planar geometry to one Ir(1) and two equivalent C(1) atoms. There are three 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(4) atom. O(1) is bonded in a distorted single-bond geometry to one C(8) atom. Cl(1) is bonded in a single-bond geometry to one Ir(1) atom. Linkers: 12 [O]C(=O)c1ccc(cc1)C1=C2C=CC3=[N]2[Ir]24(n5c1ccc5C(=C1[N]2=C(C=C1)C(=c1n4c(=C3c2ccc(cc2)C(=O)[O])cc1)c1ccc(cc1)C(=O)[O])c1ccc(cc1)C(=O)[O])(Cl)Cl. Metal clusters: 3 [C]1O[Hf@@]23O[C]O[Hf]456O[C]O[Hf]78(O[C]O[Hf]9(O[C]O[Hf](O[C]O[Hf@](O1)(O4)O9)(O2)(O7)O8)(O5)O6)O3 ,4 [C]1O[Hf]23O[C]O[Hf]456O[C]O[Hf]78(O[C]O[Hf]9(O[C]O[Hf](O[C]O[Hf](O1)(O9)(O4)O5)(O2)(O7)O8)O6)O3 ,1 [C]1O[Hf@]23O[C]O[Hf]456O[C]O[Hf]78(O[C]O[Hf]9(O[C]O[Hf](O[C]O[Hf@](O1)(O4)O9)(O2)(O7)O8)(O5)O6)O3. RCSR code: she. The MOF has largest included sphere 25.42 A, density 0.65 g/cm3, surface area 2448.46 m2/g, accessible volume 1.25 cm3/g