High-pressure in-situ X-ray diffraction and Raman spectroscopy of Ca2AlFeO5 brownmillerite

	High-pressure in-situ X-ray diffraction and Raman spectroscopy of Ca2AlFeO5 brownmillerite
	Zeming Li; Yuan Yin; Justin D. Rumney; Sean R. Shieh; Jingui Xu; Dawei Fan; Wen Liang; Shuai Yan; Shuangmeng Zhai
	2019
发表期刊	High Pressure Research
卷号	39 期号:1 页码:92-105
摘要	The behavior of Ca₂AlFeO₅ brownmillerite was studied by in situ synchrotron X-ray diffraction and Raman spectroscopy at 300 K with pressures up to 26.5 and 32.1 GPa, respectively. A reversible structural phase transition was observed. The P–V data were fitted by a third-order Birch–Murnaghan equation of state, and the isothermal bulk modulus was obtained as K₀ = 181.9(76) GPa with K₀′= 4.4(17). If K₀′ was fixed to 4, K₀ was obtained as 183.8(20) GPa. Ca₂AlFeO₅ brownmillerite shows an axial elastic anisotropy since the b-axis is more compressible than a- and c-axis. Combined with previous results, the isothermal bulk modulus and axial compressibility of Ca₂AlFeO₅ brownmillerite increase with more Al incorporated in the structure. The Raman spectra of Ca₂AlFeO₅ brownmillerite were analyzed and the pressure coefficients vary from 2.23 to 4.90 cm⁻¹/GPa. The isothermal mode Grüneisen parameters range from 0.83 to 1.77 and the thermal Grüneisen parameter is determined as 1.08(11).
关键词	Brownmillerite Ca2alfeo5 High-pressure X-ray Diffraction Raman Spectra
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/42920512-1/10492
专题	地球内部物质高温高压实验室
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, People’s Republic of China 2.University of Chinese Academy of Sciences, Beijing, People’s Republic 3.Department of Earth Sciences, University of Western Ontario, London, Canada 4.Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, People’s Republic of China 5.Key Laboratory of High-Temperature and High-Pressure Study of the Earth’s Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, People’s Republic of China Correspondence [email protected] View further author information
推荐引用方式 GB/T 7714	Zeming Li;Yuan Yin;Justin D. Rumney;Sean R. Shieh;Jingui Xu;Dawei Fan;Wen Liang;Shuai Yan;Shuangmeng Zhai. High-pressure in-situ X-ray diffraction and Raman spectroscopy of Ca2AlFeO5 brownmillerite[J]. High Pressure Research,2019,39(1):92-105.
APA	Zeming Li;Yuan Yin;Justin D. Rumney;Sean R. Shieh;Jingui Xu;Dawei Fan;Wen Liang;Shuai Yan;Shuangmeng Zhai.(2019).High-pressure in-situ X-ray diffraction and Raman spectroscopy of Ca2AlFeO5 brownmillerite.High Pressure Research,39(1),92-105.
MLA	Zeming Li;Yuan Yin;Justin D. Rumney;Sean R. Shieh;Jingui Xu;Dawei Fan;Wen Liang;Shuai Yan;Shuangmeng Zhai."High-pressure in-situ X-ray diffraction and Raman spectroscopy of Ca2AlFeO5 brownmillerite".High Pressure Research 39.1(2019):92-105.

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