Data for Manuscript =================== Data for manuscript "Pressure-Induced Postsynthetic Cluster Anion Substitution in a MIL-53 Topology Scandium Metal-Organic Framework” Chemical Science 2023, DOI: 10.1039/D3SC00904A. Authors: Alexander J. R. Thom, Gemma F. Turner, Zachary H. Davis, Martin R. Ward, Ignas Pakamore, Claire L. Hobday, David R. Allan, Mark R. Warren, Wai L. W. Leung, Iain D. H. Oswald, Russell E. Morris, Stephen A. Moggach, Sharon E. Ashbrook and Ross S. Forgan Experimental data in Origin format, Bruker NMR format Funded by: EPSRC (EP/N509668/1; EP/N015401/1) Diamond Light Source (CY24020) ERC (Advanced Grant 787073 ADOR) UKRI Future Leaders Fellowship (MR/V026070/1) Australian Research Council (ARC) Future Fellowship (FT200100243) and Discovery Project (DP220103690) CCDC 2223543–2223556 contain the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre via www.ccdc.cam.ac.uk/data_request/cif. Data available NMR spectra, powder X-ray diffraction, nitrogen adsorption.