Comment on Zarechnaya et al. Pressure-induced isostructural phase transformation in gamma-B28. Phys. Rev. B 82, 184111 (2010)

Details Comment on Zarechnaya et al. Pressure-induced isostructural phase transformation in gamma-B28. Phys. Rev. B 82, 184111 (2010) Comment on Zarechnaya et al. Pressure-induced isostructural phase transformation in gamma-B28. Phys. Rev. B 82, 184111 (2010)

2011-09-21

arxiv.org/abs/1109.4488v1

Physics

Condensed Matter

Materials Science

This Comment (submitted to PRB on 30 May 2011) was deemed unpublishable because it allegedly addresses minor details of the pa

Scientific paper

Zarechnaya et al. claimed an isostructural transformation in gamma-B28 at about 40 GPa; below which the phase is more compressible (B0=227 GPa) and above which less compressible (B0=281 GPa) than in previous experiments or theory. Here we wish to point out some interesting questions related to these claims. Summarizing briefly our points, the suggestion of an isostructural transformation is inconsistent with ab initio calculations and experiment, we see no physical mechanism that could be responsible for such a transformation, and the evidence for it is self-contradictory.

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