10.26165/JUELICH-DATA/FXSAYY Lange, Steve(BGE Bundesgesellschaft für Endlagerung mbH, Schachtanlage Asse II, 38319 Remlingen, Germany)Isaacs, Matthew(Mott MacDonald, 10 Temple Back, Bristol BS1 6FL, United Kingdom)Klinkenberg, Martina0000-0001-5470-1521(Institute of Fusion Energy and Nuclear Waste Management – Nuclear Waste Management (IFN-2))Read, David(School of Chemistry and Chemical Engineering, University of Surrey, Guildford, GU2 7XH, United Kingdom)Bosbach, Dirk0000-0002-6099-0400(Institute of Fusion Energy and Nuclear Waste Management – Nuclear Waste Management (IFN-2))Deissmann, Guido0000-0001-6039-9533(Institute of Fusion Energy and Nuclear Waste Management – Nuclear Waste Management (IFN-2)) Jülich DATA 2024 This data set contains the following experimental data: specific surface area (SSA) of cement hydration phases and HCP used in the sorption experiments, pH of aqueous solutions equilibrated with various cement hydration phases and crushed HCP prepared from CEM I used in sorption experiments and distribution ratios Rd for the uptake of I- and IO3- by cement hydration phases in different solutions. Klinkenberg, Martina(Institute of Fusion Energy and Nuclear Waste Management – Nuclear Waste Management (IFN-2))Deissmann, Guido(Institute of Fusion Energy and Nuclear Waste Management – Nuclear Waste Management (IFN-2))