Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA.
Phys Rev Lett. 2010 Jul 2;105(1):015503. doi: 10.1103/PhysRevLett.105.015503. Epub 2010 Jun 30.
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 ∼10 GPa. The pressure-induced water incorporation in the La2Zr2O7 pyrochlore structure may be related to a previously noted photoelectrochemical effect.
通过原位 X 射线衍射图谱、拉曼和红外测量的 Rietveld 精修，定量分析了镧锆石（La2Zr2O7）中压力诱导的阳离子和阴离子无序。在约 10 GPa 时，会出现晶格异常膨胀和振动模式压力依赖性的明显变化。镧锆石结构中压力诱导的水掺入可能与先前报道的光电化学效应有关。
