Experimental data for: Laboratory diffusion experiments with HTO, D2O, H218O, 36Cl-, Br-, I-, 79SeO42-, 22Na+, 85Sr2+, 133Ba2+ and 226Ra2+ in Opalinus Clay parallel to the bedding plane: experimental results and modellinghttps://doi.org/10.26165/JUELICH-DATA/7Q3NQLVan Loon, L. R.Glaus, M. A.Brandt, FelixKlinkenberg, MartinaJülich DATA2025-11-182026-03-13T12:13:48ZThe diffusion of a suite of tracers (stable isotope species and radiotracers) was studied in Opalinus Clay (OPA) samples originating from two different boreholes at the Mont Terri Underground Research Laboratory in Switzerland (BDR-2 and BMA-A1). This data publication includes Excel tables containing the raw data for the diffusion experiments presented and the corresponding modelling performed, as well as a PDF document with additional information and data that are not included in the main publication.Earth and Environmental SciencesEnglishKlinkenberg, Martina2025-09-16CCBY