Optical signatures of low spin Fe3+ in NAL at high pressure

doi:10.1002/2017JB014134

HFCAS OpenIR > 中科院固体物理研究所

	Optical signatures of low spin Fe3+ in NAL at high pressure
	Lobanov, Sergey S.1,2; Hsu, Han 3; Lin, Jung-Fu 4,5; Yoshino, Takashi 6; Goncharov, Alexander F.1,7
	2017-05-01
发表期刊	JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
摘要	The iron spin transition directly affects properties of lower mantle minerals and can thus alter geophysical and geochemical characteristics of the deep Earth. While the spin transition in ferropericlase has been documented at P similar to 60GPa and 300K, experimental evidence for spin transitions in other rock-forming minerals, such as bridgmanite and post-perovskite, remains controversial. Multiple valence, spin, and coordination states of iron in bridgmanite and post-perovskite are difficult to resolve with conventional spin probing techniques. Optical spectroscopy, on the other hand, can discriminate between high and low spin and between ferrous and ferric iron at different sites. Here we establish the optical signature of low spin Fe3+O6, a plausible low spin unit in bridgmanite and post-perovskite, by optical absorption experiments in diamond anvil cells. We show that the optical absorption of Fe3+O6 in new aluminous phase (NAL) is very sensitive to the iron spin state and may represent a model behavior of bridgmanite and post-perovskite across the spin transition. Specifically, an absorption band centered at similar to 19,000cm(-1) is characteristic of the (T2gT1g)-T-2-T-2 ((2)A(2g)) transition in low spin Fe3+ in NAL at 40GPa, constraining the crystal field splitting energy of low spin Fe3+ to similar to 22,200cm(-1), which we independently confirm by first-principles calculations. Together with available information on the electronic structure of Fe3+O6 compounds, we show that the spin-pairing energy of Fe3+ in an octahedral field is similar to 20,000-23,000cm(-1). This implies that octahedrally coordinated Fe3+ in bridgmanite is low spin at P>similar to 40GPa.
文章类型	Article
关键词	Optical Absorption Crystal Field Splitting Spin Transition Lower Mantle Diamond Anvil Cell New Aluminous Phase
WOS标题词	Science & Technology ; Physical Sciences
DOI	10.1002/2017JB014134
关键词[WOS]	EARTHS LOWER MANTLE ; REDUCED RADIATIVE CONDUCTIVITY ; THERMAL-CONDUCTIVITY ; SILICATE PEROVSKITE ; OXIDATION-STATE ; IRON ; TRANSITION ; BRIDGMANITE ; MINERALS ; PSEUDOPOTENTIALS
收录类别	SCI
语种	英语
项目资助者	NSF Major Research Instrumentation program(NSF EAR-1015239 ; NSF Major Research Instrumentation program(NSF EAR-1015239 ; NSF Major Research Instrumentation program(NSF EAR-1015239 ; NSF Major Research Instrumentation program(NSF EAR-1015239 ; Army Research Office(56122-CH-H) ; Army Research Office(56122-CH-H) ; Army Research Office(56122-CH-H) ; Army Research Office(56122-CH-H) ; Carnegie Institution of Washington and Deep Carbon Observatory ; Carnegie Institution of Washington and Deep Carbon Observatory ; Carnegie Institution of Washington and Deep Carbon Observatory ; Carnegie Institution of Washington and Deep Carbon Observatory ; Ministry of Science and Technology of Taiwan(MOST 104-2112-M-008-005-MY3) ; Ministry of Science and Technology of Taiwan(MOST 104-2112-M-008-005-MY3) ; Ministry of Science and Technology of Taiwan(MOST 104-2112-M-008-005-MY3) ; Ministry of Science and Technology of Taiwan(MOST 104-2112-M-008-005-MY3) ; NSF Geophysics Program ; NSF Geophysics Program ; NSF Geophysics Program ; NSF Geophysics Program ; CSEDI(EAR1446946 ; CSEDI(EAR1446946 ; CSEDI(EAR1446946 ; CSEDI(EAR1446946 ; Chinese Academy of Sciences(2011T2J20 ; Chinese Academy of Sciences(2011T2J20 ; Chinese Academy of Sciences(2011T2J20 ; Chinese Academy of Sciences(2011T2J20 ; Recruitment Program of Foreign Expert ; Recruitment Program of Foreign Expert ; Recruitment Program of Foreign Expert ; Recruitment Program of Foreign Expert ; National Natural Science Foundation of China(21473211) ; National Natural Science Foundation of China(21473211) ; National Natural Science Foundation of China(21473211) ; National Natural Science Foundation of China(21473211) ; JSPS MEXT/KAKENHI Grant(JP15H05827) ; JSPS MEXT/KAKENHI Grant(JP15H05827) ; JSPS MEXT/KAKENHI Grant(JP15H05827) ; JSPS MEXT/KAKENHI Grant(JP15H05827) ; National Science Foundation-Earth Sciences(EAR-1128799) ; National Science Foundation-Earth Sciences(EAR-1128799) ; National Science Foundation-Earth Sciences(EAR-1128799) ; National Science Foundation-Earth Sciences(EAR-1128799) ; Department of Energy-GeoSciences(DE-FG02-94ER14466) ; Department of Energy-GeoSciences(DE-FG02-94ER14466) ; Department of Energy-GeoSciences(DE-FG02-94ER14466) ; Department of Energy-GeoSciences(DE-FG02-94ER14466) ; DOE Office of Science(DE-AC02-06CH11357) ; DOE Office of Science(DE-AC02-06CH11357) ; DOE Office of Science(DE-AC02-06CH11357) ; DOE Office of Science(DE-AC02-06CH11357) ; (0330-2016-0006) ; (0330-2016-0006) ; (0330-2016-0006) ; (0330-2016-0006) ; NSF EAR-1520648 ; NSF EAR-1520648 ; NSF EAR-1520648 ; NSF EAR-1520648 ; EAR1502594) ; EAR1502594) ; EAR1502594) ; EAR1502594) ; YZ201524) ; YZ201524) ; YZ201524) ; YZ201524) ; NSF EAR/IF-1128867) ; NSF EAR/IF-1128867) ; NSF EAR/IF-1128867) ; NSF EAR/IF-1128867)
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000403465600017
引用统计	被引频次：15[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/31970
专题	中科院固体物理研究所
作者单位	1.Carnegie Inst Sci, Geophys Lab, Washington, DC 20005 USA 2.Russian Acad Sci, Sobolev Inst Geol & Mineral, Siberian Branch, Novosibirsk, Russia 3.Natl Cent Univ, Dept Phys, Taoyuan, Taiwan 4.Univ Texas Austin, Dept Geol Sci, Jackson Sch Geosci, Austin, TX USA 5.Ctr High Pressure Sci & Technol Adv Res HPSTAR, Shanghai, Peoples R China 6.Okayama Univ, Inst Planetary Mat, Misasa, Tottori, Japan 7.Chinese Acad Sci, Inst Solid State Phys, Mat Phys, Hefei, Peoples R China
推荐引用方式 GB/T 7714	Lobanov, Sergey S.,Hsu, Han,Lin, Jung-Fu,et al. Optical signatures of low spin Fe3+ in NAL at high pressure[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2017,122(5):3565-3573.
APA	Lobanov, Sergey S.,Hsu, Han,Lin, Jung-Fu,Yoshino, Takashi,&Goncharov, Alexander F..(2017).Optical signatures of low spin Fe3+ in NAL at high pressure.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,122(5),3565-3573.
MLA	Lobanov, Sergey S.,et al."Optical signatures of low spin Fe3+ in NAL at high pressure".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 122.5(2017):3565-3573.

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
Optical signatures o（3244KB）	期刊论文	作者接受稿	开放获取	CC BY-NC-SA	浏览下载