Raman spectroscopic and X-ray diffraction study of alpha- and beta-Mg2P2O7 at various temperatures

doi:10.1016/j.saa.2022.121076

	Raman spectroscopic and X-ray diffraction study of alpha- and beta-Mg2P2O7 at various temperatures
	Weihong Xue; Kuan Zhai ; Hu Wang ; Xiang Wu ; Wen Wen ; Shuangmeng Zhai
	2022
发表期刊	Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
卷号	273 页码:121076
摘要	Raman spectra and X-ray diffraction patterns of Mg2P2O7 polymorphs (alpha- and beta-phase) were investigated at various temperatures up to 1073 K at ambient pressure. Typical Raman spectra and X-ray diffraction patterns were observed for the reversible phase transition between low-temperature alpha-Mg2P2O7 and high- temperature beta-Mg2P2O7 during heating and cooling. The effect of temperature on the Raman vibrations for the two Mg2P2O7 polymorphs was quantitatively analyzed. All the observed Raman active bands of the two Mg2P2O7 polymorphs showed linear temperature dependence with different slopes. The quantitative temperature dependences of the Raman bands are -4.01 x 10(-2) similar to 1.94 x 10(-2) and -2.31 x 10(-2) similar to -0.44 x 10(-2) cm(-1) K-1 for alpha- and beta-Mg2P2O7, respectively. The force constant evolution of [P2O7](4-) stretching vibrations and the temperature derivatives for both alpha- and beta-Mg2P2O7 were also determined. The thermal expansion coefficient of beta-Mg2P2O7 was estimated at 2.97(8) x 10(-5) K-1. Hence the isobaric mode Gruneisen parameters of beta-Mg2P2O7 were calculated. (C) 2022 Elsevier B.V. All rights reserved.
关键词	Mg2p2o7 phase Transition raman Spectra x-ray Diffraction high Temperature
DOI	10.1016/j.saa.2022.121076
URL	查看原文
收录类别	SCI
语种	英语
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/42920512-1/13472
专题	地球内部物质高温高压实验室地球深部物质与流体作用地球化学研究室
作者单位	1.Key Laboratory of High-temperature and High-pressure Study of the Earth’s Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081 China 2.University of Chinese Academy of Sciences, Beijing 100049, China 3.State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, China 4.Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
推荐引用方式 GB/T 7714	Weihong Xue,Kuan Zhai,Hu Wang,et al. Raman spectroscopic and X-ray diffraction study of alpha- and beta-Mg2P2O7 at various temperatures[J]. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy,2022,273:121076.
APA	Weihong Xue,Kuan Zhai,Hu Wang,Xiang Wu,Wen Wen,&Shuangmeng Zhai.(2022).Raman spectroscopic and X-ray diffraction study of alpha- and beta-Mg2P2O7 at various temperatures.Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy,273,121076.
MLA	Weihong Xue,et al."Raman spectroscopic and X-ray diffraction study of alpha- and beta-Mg2P2O7 at various temperatures".Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 273(2022):121076.

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