Comment on “High-pressure x-ray diffraction study of YBO3/Eu3+, GdBO3, and EuBO3: Pressure-induced amorphization in GdBO3” [J. Appl. Phys. <b>115</b>, 043507 (2014)]

D. Errandonea, A. Muñoz, J. Gonzalez-Platas

doi:10.1063/1.4881057

Comment on “High-pressure x-ray diffraction study of YBO3/Eu3+, GdBO3, and EuBO3: Pressure-induced amorphization in GdBO3” [J. Appl. Phys. <b>115</b>, 043507 (2014)]

DOI PDF 被引用文献1件

D. Errandonea

Universidad de Valencia 1 Departamento de Física Aplicada-ICMUV, MALTA Consolider Team, , Edificio de Investigación, C/Dr. Moliner 50, Burjassot, 46100 Valencia, Spain
A. Muñoz

Universidad de La Laguna 2 Departamento de Física, Instituto de Materiales y Nanotecnología, MALTA Consolider Team, , La Laguna, E-38205 Tenerife, Spain
J. Gonzalez-Platas

Universidad de La Laguna 3 Departamento de Física, Servicio de Difracción de Rayos X, , 38206 La Laguna, Tenerife, Spain

書誌事項

公開日: 2014-06-02

DOI

10.1063/1.4881057

公開者: AIP Publishing

この論文をさがす

CiNii Books

説明

<jats:p>High-pressure x-ray diffraction studies on vaterite-type borates were reported on the above paper and their room-temperature P-V equation of state (EOS) determined. YBO3/Eu3+ and GdBO3 were found to have bulk moduli around 320 GPa, 90% larger than the bulk modulus obtained for EuBO3. Consequently, it was stated that vaterite-type borates are as incompressible as cubic BN. Such a different compressional behavior of isomorphic borates contradicts the known systematic of related borates. Here, we show that the conclusions reported on the above article could be hindered by experimental errors and artifacts. Ab initio calculations support our criticism giving similar bulk moduli (130–141 GPa) in the three compounds. Based upon these arguments, we conclude that the high-pressure behavior of vaterite-type borates should be revised using accurate experimental techniques. Finally, a methodological critic on EOS fits and to structural refinements is also presented.</jats:p>