Comment on the paper “Multiferroic and optical spectroscopic behavior of BST in BFO environment” by B. Mohanty et al.

My comments concern the significant errors in the crystallographic part of the commented paper [J. Mater. Sci.: Mater. Electron. (2019) 30, 9211]. Moreover, some data are the same as in the previous paper published by authors. The studied sample is not a solid solution of two different compounds but simple trigonal BiFeO₃ with some admixture of Sr, Ba, and Ti ions, i.e., BiFeO₃:Sr, Ba, Ti and not orthorhombic nor tetragonal BaTiO₃ with some dopants.