Phase transition of Mg-3(PO4)(2) polymorphs at high-temperature: In-situ synchrotron X-ray diffraction and Raman spectroscopic study

doi:10.1016/j.saa.2021.120762

	Phase transition of Mg-3(PO4)(2) polymorphs at high-temperature: In-situ synchrotron X-ray diffraction and Raman spectroscopic study
	Xin Hu ; Kuan Zhai ; Muhua Jia ; Yungui Liu ; Xiang Wu ; Wen Wen ; Weihong Xue; Shuangmeng Zhai
	2022
发表期刊	Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
卷号	269 页码:120762
摘要	In-situ synchrotron X-ray diffraction and Raman spectroscopy were used to study the stabilities, thermal expansion and vibrational modes of synthetic Mg-3(PO4)(2). The polymorphs (Mg-3(PO4)(2)-I, II, III) were investigated in the temperature range of 299 similar to 1173 K at ambient pressure. An irreversible phase transition was observed for both Mg-3(PO4)(2)-II and Mg-3(PO4)(2)-III, whereas Mg-3(PO4)(2)-I is stable in the present study. Based on the in-situ synchrotron X-ray diffraction and Raman spectroscopic measurements, Mg-3(PO4)2-II and Mg-3(PO4)(2)-III transform to Mg-3(PO4)(2)-I at 1073 K and 1023 K, respectively. The volumetric thermal expansion coefficients of Mg-3(PO4)(2)-I, II and III were determined as 3.31(4) x 10(-5) K-1, 3.91(4) x 10(-5) K-1, and 3.25(5) x 10(-5) K-1, respectively. All three Mg-3(PO4)(2) polymorphs show axial thermal expansive anisotropy since the thermal expansion coefficients along different axes are inconsistent. The effect of temperature on the Raman vibrations of the three Mg-3(PO4)(2) polymorphs was quantitatively analyzed. And the isobaric mode Grfineisen parameters of three Mg-3(PO4)(2) polymorphs are calculated, which are in the range of 0.07 similar to 3.54.
关键词	Mg3(Po4)2 Polymorphs phase Transition high-temperature X-ray Diffraction raman Spectroscopy thermal Expansionisobaric Mode Grüneisen Parameters
DOI	10.1016/j.saa.2021.120762
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/42920512-1/13479
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, Guizhou, 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, Hubei 430074, China 4.Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China
推荐引用方式 GB/T 7714	Xin Hu,Kuan Zhai,Muhua Jia,et al. Phase transition of Mg-3(PO4)(2) polymorphs at high-temperature: In-situ synchrotron X-ray diffraction and Raman spectroscopic study[J]. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy,2022,269:120762.
APA	Xin Hu.,Kuan Zhai.,Muhua Jia.,Yungui Liu.,Xiang Wu.,...&Shuangmeng Zhai.(2022).Phase transition of Mg-3(PO4)(2) polymorphs at high-temperature: In-situ synchrotron X-ray diffraction and Raman spectroscopic study.Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy,269,120762.
MLA	Xin Hu,et al."Phase transition of Mg-3(PO4)(2) polymorphs at high-temperature: In-situ synchrotron X-ray diffraction and Raman spectroscopic study".Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 269(2022):120762.

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