Comments on the paper "Structural, dielectric, electrical and optical properties of a double perovskite: BaNaFeWO6 for some device applications" by S. Mishra, RNP Choudhary, SK Parida, and published in Journal of Molecular Structure 1265 (2022) 133353

My comments concern the errors in the crystallographic part of the commented paper. Moreover, the true chemical composition of the studied sample is different than BaNaFeWO6 as proposed by authors. Therefore, the subsequent data on other measurements may have no scientific value.