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Water self-diffusion propagators measured within the saturated clay sample. More details on the selected diffusion directors e⃗i are given in Section III, leading to the components of the self-diffusion tensor D1 = 1.041 × 10–9 m2/s, D2 = 1.062 × 10–9 m2/s, D3 = 0.918 × 10–9 m2/s, D4 = 1.067 × 10–9 m2/s, D5 = 0.991 × 10–9 m2/s, and D6 = 0.992 × 10–9 m2/s.
