<p>The lead-free material CaBiGdNbVO<sub>9</sub> described in the paper Kumar et al. (J Korean Phys Soc, 85:451–539, 2024) does not exist, but is a result of erroneous processing of diffraction data. The studied samples were mixtures of several other compounds, mainly GdVO<sub>4</sub>.</p>

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Comments to paper by N. Kumar et. al. on CaBiGdNbVO9

  • Paweł E. Tomaszewski

摘要

The lead-free material CaBiGdNbVO9 described in the paper Kumar et al. (J Korean Phys Soc, 85:451–539, 2024) does not exist, but is a result of erroneous processing of diffraction data. The studied samples were mixtures of several other compounds, mainly GdVO4.