High-pressure structural investigation of several zircon-type orthovanadates

被引：97

作者：

Errandonea, D. ^{[1
,3
]}

Lacomba-Perales, R. ^{[1
,2
]}

Ruiz-Fuertes, J. ^{[1
,2
]}

Segura, A. ^{[1
,2
]}

Achary, S. N. ^{[4
]}

Tyagi, A. K. ^{[4
]}

机构：

[1] Univ Valencia, Malta Consolider Team, E-46100 Valencia, Spain

[2] Univ Valencia, Dept Fis Aplicada, ICMUV, E-46100 Valencia, Spain

[3] Univ Valencia, Fdn Gen, E-46100 Valencia, Spain

[4] Bhabha Atom Res Ctr, Div Chem, Bombay 400085, Maharashtra, India

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 18期

关键词：

compressibility; equations of state; europium compounds; high-pressure solid-state phase transformations; lutetium compounds; scandium compounds; X-ray diffraction; PHASE-TRANSITIONS; THERMAL-EXPANSION; CRYSTAL-STRUCTURE; SCHEELITE; TEMPERATURE; TRANSFORMATION; MECHANISM; VANADATE; CAWO4; LUPO4;

D O I：

10.1103/PhysRevB.79.184104

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 EuVO4, LuVO4, and ScVO4 were performed up to 27 GPa. In all the three compounds we found evidence of a pressure-induced structural phase transformation from zircon to a scheelite-type structure. The onset of the transition is near 8 GPa, but the transition is sluggish and low-pressure and high-pressure phases coexist in a pressure range of about 10 GPa. In EuVO4 and LuVO4 a second transition to a M-fergusonite-type phase was found near 21 GPa. The equations of state for the zircon and scheelite phases are also determined. Among the three studied compounds, we found that ScVO4 is less compressible than EuVO4 and LuVO4, being the most incompressible orthovanadate studied to date. The sequence of structural transitions and compressibilities are discussed in comparison with other zircon-type oxides.

引用

页数：9

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