Elastic properties of Mg-phase D at high pressure. Issue 3 (3rd July 2021)

• Record Type: Journal Article
• Authors: Xu, Chaowen; Li, Ying; Inoue, Toru; Gréaux, Steeve; Li, Qingze; Gao, Jing; Sun, Fengxia; Fang, Leiming
• Is Part Of: High pressure research. Volume 41:Issue 3(2021)
• Page Start: 233
• Page End: 246
• Publication Date: 2021-07-03
• Subjects: Hydrous minerals -- elastic properties -- high pressure; High pressure (Science) -- Periodicals; High pressure (Technology) -- Periodicals; 536.41
• DOI: 10.1080/08957959.2021.1954177
• Languages: English
• ISSNs: 0895-7959

Abstract

ABSTRACT: The sound velocities of polycrystalline Mg-phase D were investigated at the pressure up to 13.6 GPa and room temperature, using ultrasonic interferometry in a multi-anvil apparatus. The P ( VP ) and S ( VS ) wave velocities obtained at ambient conditions produced the results of VP = 9.26(3) km/s and VS = 5.46(1) km/s. The results are in accordance with the values for Mg-phase D by Brillouin scattering ( VP = 9.25 km/s and VS = 5.51km/s). The results, i.e. Ks0 = 153.8(13) GPa and G0 = 99.8(5) GPa obtained through two-dimensional linear fitting analysis are self-consistent with Ks0 = 153.3(16) GPa and G0 = 99.5(10) GPa derived by third-order Eulerian finite strain equations. We also find that Vp of phase D is 1.8–2.2% lower than Fe-ringwoodite, but Vs is higher than Fe-ringwoodite at the bottom of the mantle transition zone by up to 1.3%.