In a similar manner to how the CRTA analysis allows the impact of the fillers on the group velocities and lifetimes to be quantified, finding a constant value 𝑃 ̃ such that setting the 𝑃 𝜆 in Eq. 13 to 𝑃 𝜆 = 𝑃 ̃ recovers the 𝜅 latt provides a means to quantify the impact of changes to the interaction strengths on the thermal transport. Based on Eqs. 7 and 13, the 𝜅 latt vary inversely with 𝑃 ̃. Fig. plots the 𝜅 latt of CoSb3 at 300 and 600 K as a function of 𝑃 ̃-1 . The calculated 𝜅 latt is recovered for 𝑃 ̃ = 3.94 × 10 -13 and 3.99 × 10 -13 eV 2 at the two temperatures, which are both roughly an order of magnitude smaller than the average 𝑃 𝜆 (Table , Table .