The anisotropy between the xy plane and z direction is much more pronounced in the the conductivity, power factor and electronic thermal conductivity (Figures and). This results from the highly-anisotropic effective charge carrier masses discussed in Section 3.2. σ is directly proportional to the mobility µ through σ = neµ, where e is electron charge. µ is directly related to the scattering relaxation time τ and inversely proportional to the m * through µ = τ m * . The conductivities span a range of 1.07 × 10 2 -1.8 × 10 6 S m -1 in the xy plane and 0.03-645 S m -1 along the z direction. Due to the combined effects of stronger scattering and the large m * , the out-of-plane conductivity is three orders of magnitude smaller than in-plane, which directly affects the power factor and electronic thermal conductivity, both of which are directly proportional to σ.