Materials Science & Physics
posted by Jinwon .
Consider a tetragonal phase of which the lattice parameters satisfy c = 2a. Diffusivities of the phase were measured in two different directions as:
6.0x10-12 cm2/sec along  and 8.0x10-12 cm2/sec along .
(a) Determine the diffusivity tensor (Dij) expressed with respect to the coordinate system consisting of crystallographic axes ,  and .
(b) Calculate the diffusivity along .