Question: Consider a tetragonal phase with the lattice parameters satisfying c = 2a. Diffusivities of the phase were measured in two different directions as: 6.010-2

Consider a tetragonal phase with the lattice parameters satisfying c = 2a.

Consider a tetragonal phase with the lattice parameters satisfying c = 2a. Diffusivities of the phase were measured in two different directions as: 6.010-2 cm/sec along [101] and 8.010-2 cm/sec along [001]. (a) Determine the diffusivity tensor (D) expressed with respect to the coordinate system consisting of crystallographic axes [100], [010] and [001]. (b) Calculate the diffusivity along [201].

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