光散射学报, 2017, 29 (2): 133, 网络出版: 2017-07-05
KBrO3在高压下拉曼光谱和结构的研究
A Study on the Vibrational and Structural Behavior of KBrO3 at High Pressure
溴酸钾 拉曼散射 X射线衍射 高压 Grüneisen参数 KBrO3 Raman scattering x-ray diffraction high pressure Grüneisen parameter
摘要
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30.9 GPa。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。
Abstract
We investigated the structural stability of KBrO3 by means of high-pressure Raman spectroscopy and angle-dispersive X-ray diffraction(AD-XRD).The Raman spectra of KBrO3 at pressures up to 30.9 GPa showed no changes besides monotonic 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,Grüneisen parameters of KBrO3 were also determined.
李文涛, 彭放, 白燕枝, 于振海, 闫帅, 李晓东, 杨科, 王霖. KBrO3在高压下拉曼光谱和结构的研究[J]. 光散射学报, 2017, 29(2): 133. LI Wentao, PENG Fang, BAI Yanzhi, YU Zhenhai, YAN Shuai, LI Xiaodong, YANG Ke, WANG Lin. A Study on the Vibrational and Structural Behavior of KBrO3 at High Pressure[J]. The Journal of Light Scattering, 2017, 29(2): 133.