Pressure-Induced Disordering and Anomalous Lattice Expansion in La2Zr2O7 Pyrochlore

被引：62

作者：

Zhang, F. X. ^{[1
]}

Lang, M. ^{[1
]}

Liu, Zhenxian ^{[2
]}

Ewing, R. C. ^{[1
]}

机构：

[1] Univ Michigan, Dept Geol Sci, Ann Arbor, MI 48109 USA

[2] Carnegie Inst Sci, Geophys Lab, Washington, DC 20015 USA

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 01期

基金：

美国能源部;

关键词：

RADIATION TOLERANCE; WASTE FORM; ION; A(2)B(2)O(7); TRANSITION; CONDUCTION; PLUTONIUM;

D O I：

10.1103/PhysRevLett.105.015503

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Pressure-induced cation and anion disordering in La2Zr2O7 pyrochlore is quantitatively analyzed by Rietveld refinement of in situ x-ray diffraction patterns, Raman, and infrared measurements. An anomalous lattice expansion and obvious change of the pressure dependence of the vibrational modes occur at similar to 10 GPa. The pressure-induced water incorporation in the La2Zr2O7 pyrochlore structure may be related to a previously noted photoelectrochemical effect.

引用

页数：4

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