Sound velocities of Na0.4Mg0.6Al1.6Si0.4O4 NAL and CF phases to 73 GPa determined by Brillouin scattering method

	Sound velocities of Na0.4Mg0.6Al1.6Si0.4O4 NAL and CF phases to 73 GPa determined by Brillouin scattering method
	Lidong Dai; Yuki Kudo; Kei Hirose; Motohiko Murakami; Yuki Asahara; Haruka Ozawa; Yasuo Ohishi; Naohisa Hirao
	2013
发表期刊	Physics and Chemistry of Minerals
卷号	40 期号:3 页码:195-201
摘要	The sound velocities of two aluminum-rich phases in the lower mantle, hexagonal new Al-rich phase (NAL) and its corresponding high-pressure polymorph orthorhombic Ca-ferrite-type phase (CF), were determined with the Brillouin scattering method in a pressure range from 9 to 73 GPa at room temperature. Both NAL and CF samples have identical chemical composition of Na0.4Mg0.6Al1.6Si0.4O4 (40 % NaAlSiO4-60 % MgAl2O4). Infrared laser annealing in the diamond anvil cell was performed to minimize the stress state of the sample and obtain the high-quality Brillouin spectra. The results show shear modulus at zero pressure G (0) = 121.960 +/- A 0.087 GPa and its pressure derivative G' = 1.961 +/- A 0.009 for the NAL phase, and G (0) = 129.653 +/- A 0.059 GPa and G' = 2.340 +/- A 0.004 for the CF phase. The zero-pressure shear velocities of the NAL and CF phases are obtained to be 5.601 +/- A 0.005 km/sec and 5.741 +/- A 0.001 km/sec, respectively. We also found that shear velocity increases by 2.5 % upon phase transition from NAL to CF at around 40 GPa.
关键词	High Pressure Nal Phase Cf Phase Morb Sound Velocity
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/352002/5108
专题	地球内部物质高温高压实验室_地球内部物质高温高压实验室_期刊论文
推荐引用方式 GB/T 7714	Lidong Dai,Yuki Kudo,Kei Hirose,et al. Sound velocities of Na0.4Mg0.6Al1.6Si0.4O4 NAL and CF phases to 73 GPa determined by Brillouin scattering method[J]. Physics and Chemistry of Minerals,2013,40(3):195-201.
APA	Lidong Dai.,Yuki Kudo.,Kei Hirose.,Motohiko Murakami.,Yuki Asahara.,...&Naohisa Hirao.(2013).Sound velocities of Na0.4Mg0.6Al1.6Si0.4O4 NAL and CF phases to 73 GPa determined by Brillouin scattering method.Physics and Chemistry of Minerals,40(3),195-201.
MLA	Lidong Dai,et al."Sound velocities of Na0.4Mg0.6Al1.6Si0.4O4 NAL and CF phases to 73 GPa determined by Brillouin scattering method".Physics and Chemistry of Minerals 40.3(2013):195-201.

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