Comments on the paper "Fabrication and physical characteristics of K/W double doped BiFeO₃ complex electro-ceramic; (Bi_1/2K_1/2)(Fe_1/2W_1/2)O ₃"

By this commentary, we showed that the claimed compound, (Bi1/2K1/2)(Fe1/2W1/2)O-3, does not exist. We tried to reproduce the claimed compound through the synthesis in air at 1053 K (similar to the synthesis conditions used in the commented paper), and we obtained a mixture of Bi2WO6, K2WO4, and Fe2O3. The X-ray diffraction pattern of this mixture partly matches with the X-ray diffraction pattern of the claimed compound reported in the commented paper.