(HoC7H5O4)2C7NH4 is Indium-derived structured and crystallizes in the tetragonal P-42_1c space group. The structure is zero-dimensional and consists of four schembl5425382 molecules and two HoC7H5O4 clusters. In each HoC7H5O4 cluster, Ho(1) is bonded to one O(2), one O(3), one O(4), and three equivalent O(1) atoms to form distorted edge-sharing HoO6 pentagonal pyramids. The Ho(1)-O(2) bond length is 2.34 Å. The Ho(1)-O(3) bond length is 2.30 Å. The Ho(1)-O(4) bond length is 2.31 Å. There are a spread of Ho(1)-O(1) bond distances ranging from 2.29-2.44 Å. There are eight inequivalent C sites. In the first C site, C(2) is bonded in a distorted single-bond geometry to one C(1) and one H(3) atom. The C(2)-C(1) bond length is 1.38 Å. The C(2)-H(3) bond length is 0.93 Å. In the second C site, C(1) is bonded in a distorted trigonal planar geometry to one C(11), one C(2), and one H(2) atom. The C(1)-C(11) bond length is 1.40 Å. The C(1)-H(2) bond length is 0.93 Å. In the third C site, C(5) is bonded in a distorted single-bond geometry to one C(6) and one H(5) atom. The C(5)-C(6) bond length is 1.38 Å. The C(5)-H(5) bond length is 0.93 Å. In the fourth C site, C(6) is bonded in a trigonal planar geometry to one C(5), one C(7), and one C(9) atom. The C(6)-C(7) bond length is 1.39 Å. The C(6)-C(9) bond length is 1.46 Å. In the fifth C site, C(7) is bonded in a distorted single-bond geometry to one C(6) and one H(6) atom. The C(7)-H(6) bond length is 0.93 Å. In the sixth C site, C(10) is bonded in a bent 120 degrees geometry to one C(11) and two equivalent O(4) atoms. The C(10)-C(11) bond length is 1.49 Å. Both C(10)-O(4) bond lengths are 1.24 Å. In the seventh C site, C(11) is bonded in a trigonal planar geometry to one C(10) and two equivalent C(1) atoms. In the eighth C site, C(9) is bonded in a distorted bent 120 degrees geometry to one C(6), one O(2), and one O(3) atom. The C(9)-O(2) bond length is 1.24 Å. The C(9)-O(3) bond length is 1.25 Å. There are five inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(1) atom. The H(1)-O(1) bond length is 0.85 Å. In the second H site, H(2) is bonded in a single-bond geometry to one C(1) atom. In the third H site, H(5) is bonded in a single-bond geometry to one C(5) atom. In the fourth H site, H(6) is bonded in a single-bond geometry to one C(7) atom. In the fifth H site, H(3) is bonded in a single-bond geometry to one C(2) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to three equivalent Ho(1) and one H(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Ho(1) and one C(9) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Ho(1) and one C(9) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Ho(1) and one C(10) atom. Linkers: 4 [O]C(=O)c1ccc(N(c2ccc(C([O])=O)cc2)c2ccc(C([O])=O)cc2)cc1. Metal clusters: 2 O[Ho@]12O[C]O[Ho@@]3(O)O[C]O[Ho@](O)(O[C]O[Ho@@](O)(O[C]O1)O[C]O3)O[C]O2. RCSR code: tsx. The MOF has largest included sphere 6.98 A, density 1.20 g/cm3, surface area 2876.07 m2/g, accessible volume 0.48 cm3/g