𝑁 𝐴→𝐵 𝜏 𝐴 (8) where vA->B is the jump frequency for jumps from site A to site B, NA->B is the number of recorded jumps from A to B, and τ A is the time of occupation of site A. Ea, jump is then obtained from equation (1). Calculation of Jump diffusivities and tracer diffusivities DJ and Dtr.: DJ and Dtr. are in principle calculated with the same formula: