Abstract
My comments concern the errors in the crystallographic part of the title paper. The diffraction patterns are erroneously analysed and authors claim to have prepared a single phase new double perovskite Ba2BiVO6. A critical review of the experimental data reveals that the diffraction patterns are questionable and do not support the proposed formula. It is clear that the studied sample contains Ba3(VO4)2 crystal as a major part constituent. Thus, the subsequent data have no scientific value.
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