Liu et al. recently carried out a systematic study of the Bi2(S,Se,Te)3 ternary phase space and established several compositional trends in the thermoelectric performance. The thermal conductivities of mixed compositions along the Bi2(Se1-xTex)3 tie line were found to be lower than the closest endpoints and to reach a minimum for Bi2Se2Te. Bi2STe2 and Bi2S2Te were found to show lower thermal conductivities than either of Bi2S3 and Bi2Te3, and a global minimum in the 𝜅 latt was identified at Bi2Te1.2Se1.8. The reduced 𝜅 latt of the mixed compositions was attributed to enhanced phonon scattering in the alloys. In contrast, measurements of the electrical properties showed a strong dependence on the Te content, and the weighted mobility was optimized towards Bi2Te3.