High-pressure in-situ X-ray diffraction and Raman spectroscopy of Ca 2 AlFeO 5 brownmillerite

CORC > 地球化学研究所 > 中国科学院地球化学研究所 > 地球内部物质高温高压实验室

	High-pressure in-situ X-ray diffraction and Raman spectroscopy of Ca 2 AlFeO 5 brownmillerite
	Zeming Li; Yuan Yin; Justin D. Rumney; Sean R. Shieh; Jingui Xu; Dawei Fan; Wen Liang; Shuai Yan; Shuangmeng Zhai
刊名	High Pressure Research
	2019
卷号	39 期号:1 页码:92-105
关键词	Brownmillerite Ca2alfeo5 High-pressure X-ray Diffraction Raman Spectra
英文摘要	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).
语种	英语
内容类型	期刊论文
源URL	[http://ir.gyig.ac.cn/handle/42920512-1/10925]
专题	地球化学研究所_地球内部物质高温高压实验室
作者单位	1.Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, People’s Republic of China 2.Department of Earth Sciences, University of Western Ontario, London, Canada 3.University of Chinese Academy of Sciences, Beijing, People’s Republic of China 4.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
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 Ca 2 AlFeO 5 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 Ca 2 AlFeO 5 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 Ca 2 AlFeO 5 brownmillerite".High Pressure Research 39.1(2019):92-105.