In situ high-pressure synchrotron X-ray diffraction study of the structural stability in NdVO4 and LaVO4

被引：65

作者：

Errandonea, D. ^{[1
]}

Popescu, C. ^{[2
]}

Achary, S. N. ^{[3
]}

Tyagi, A. K. ^{[3
]}

Bettinelli, M. ^{[4
]}

机构：

[1] Univ Valencia, MALTA Consolider Team, Dept Fis Aplicada ICMUV, Valencia 46100, Spain

[2] CELLS ALBA Synchrotron Light Facil, Barcelona 08290, Spain

[3] Bhabha Atom Res Ctr, Div Chem, Mumbai 400085, Maharashtra, India

[4] Univ Verona, DB & INSTM, Luminiscent Mat Lab, I-37134 Verona, Italy

来源：

MATERIALS RESEARCH BULLETIN | 2014年 / 50卷

关键词：

Ceramics; High-pressure; X-ray diffraction; Crystal structure; Phase transition; CRYSTAL; PHASE; RAMAN; TUNGSTATES; TBVO4;

D O I：

10.1016/j.materresbull.2013.10.047

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Room-temperature angle-dispersive X-ray diffraction measurements on zircon-type NdVO4 and monazite-type LaVO4 were performed in a diamond-anvil cell up to 12 GPa. In NdVO4, we found evidence for a non-reversible pressure-induced structural phase transition from zircon to a monazite-type structure at 6.5 GPa. Monazite-type LaVO4 also exhibits a phase transition but at 8.6 GPa. In this case the transition is reversible and isomorphic. In both compounds the pressure induced transitions involve a large volume collapse. Finally, the equations of state and axial compressibilities for the low-pressure phases are also determined. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：279 / 284

页数：6

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