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| 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 | |
| Source Publication | Physics and Chemistry of Minerals
 |
| Volume | 40Issue:3Pages:195-201 |
| Abstract | 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. |
| Keyword | High Pressure Nal Phase Cf Phase Morb Sound Velocity |
| Indexed By | SCI |
| Language | 英语 |
| Document Type | 期刊论文 |
| Identifier | http://ir.gyig.ac.cn/handle/352002/5108 |
| Collection | 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 |
| Recommended Citation 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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