KBrO_3在高压下拉曼光谱和结构的研究（英文）

A Study on the Vibrational and Structural Behavior of KBrO_3 at High Pressure

利用原位高压拉曼散射和X射线衍射技术,研究了KBrO3在高压下晶格振动和晶体结构演化行为。最高压力达30.9GPa。通过拉曼光谱发现,在高压下拉曼峰位除了单调移动,没有其它变化,表明KBrO3在研究的压力范围没有发生相变。原位高压X射线衍射实验数据显示,其在高压下依然保持常压的六方结构。通过进一步分析,分别得到了体弹模量B0=25.9(2)GPa(B′0=5.68(0.38))和部分拉曼峰的Grüneisen参数。

We investigated the structural stability of KBr03 by means of high-pressure Raman spectroscopy and angle-dispersive X-ray diffraction （AD-XRD）. The Raman spectra of KBr03 at pressures up to 30. 9 GPa showed no changes besides mono tonic shifts, suggesting no structural transformation occurred up to the highest pressure studied. The AD-XRD suggested the sample remained in its ambient pressure hexagonal phase. The bulk modulus was determined to be B0 = 25. 9（2） GPa with a pressure derivative B’0 = 5. 68（0. 38）. With the combination of Raman and AD-XRD,Grlineisen parameters of KBr03 were also determined.