Comment on "Investigation on the structure and thermoelectric properties of Cu_xTe binary compounds" by Shriparna...

The Raman spectra of copper tellurides are nearly unknown. This is due not only to the difficulty in obtaining single-phase specimens, but also to the low inelastic light scattering efficiency of Cu_2-xTe. To date, only the Raman spectrum of the vulcanite phase, CuTe, has been both measured and calculated by density functional theory. The authors of the commented work reported the Raman spectra of Cu₂Te, Cu_1.6Te and Cu_1.25Te samples. However, the assignment of the measured modes has been defective and their Raman spectra lack some of the features usually found for copper tellurides.