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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
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/42920512-1/10925
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 of China
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
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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.
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