scholarly journals High-Pressure Sound Velocity Measurements of Liquids Using In Situ Ultrasonic Techniques in a Multianvil Apparatus

Minerals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 126 ◽  
Author(s):  
Zhicheng Jing ◽  
Tony Yu ◽  
Man Xu ◽  
Julien Chantel ◽  
Yanbin Wang
Keyword(s):  
High Pressure ◽  
Sound Velocity ◽  
Velocity Measurements ◽  
Melting Temperatures ◽  
Technical Developments ◽  
Silicate Liquids ◽  
Ultrasonic Techniques ◽  
Photon Source

Sound velocity and equation of state of liquids provide important constraints on the generation, presence, and transport of silicate and metallic melts in the Earth’s interior. Unlike their solid counterparts, these properties of liquids pose great technical challenges to high-pressure measurements and are poorly constrained. Here we present the technical developments that have been made at the GSECARS beamline 13-ID-D of the Advanced Photon Source for the past several years for determination of sound velocity of liquids using the ultrasonic techniques in a 1000-ton Kawai-type multianvil apparatus. Temperature of the sound velocity measurements has been extended to ~2400 K at 4 GPa and ~2000 K at 8 GPa to enable studies of liquids with very high melting temperatures, such as the silicate liquids.

Single Crystal Growth of High-Pressure Phases of Ice and Salt Hydrate Far Below the Original Melting Point by Mixing Alcohol: Crystal Structure Determination of Magnesium Chloride Heptahydrate

2020 ◽  
Author(s):  
Keishiro Yamashita ◽  
Kazuki Komatsu ◽  
Hiroyuki Kagi
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Crystal Growth ◽  
Single Crystal ◽  
Room Temperature ◽  
Growth Technique ◽  
Salt Hydrate ◽  
X Ray

An crystal-growth technique for single crystal x-ray structure analysis of high-pressure forms of hydrogen-bonded crystals is proposed. We used alcohol mixture (methanol: ethanol = 4:1 in volumetric ratio), which is a widely used pressure transmitting medium, inhibiting the nucleation and growth of unwanted crystals. In this paper, two kinds of single crystals which have not been obtained using a conventional experimental technique were obtained using this technique: ice VI at 1.99 GPa and MgCl<sub>2</sub>·7H<sub>2</sub>O at 2.50 GPa at room temperature. Here we first report the crystal structure of MgCl2·7H2O. This technique simultaneously meets the requirement of hydrostaticity for high-pressure experiments and has feasibility for further in-situ measurements.

Sound velocity measurements of hcp Fe-Si alloy at high pressure and high temperature by inelastic X-ray scattering

2018 ◽  
Vol 103 (1) ◽  
pp. 85-90 ◽  
Author(s):  
Takanori Sakairi ◽  
Tatsuya Sakamaki ◽  
Eiji Ohtani ◽  
Hiroshi Fukui ◽  
Seiji Kamada ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Sound Velocity ◽  
Velocity Measurements ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

scholarly journals Composition of the Earth's inner core from high-pressure sound velocity measurements in Fe–Ni–Si alloys

2010 ◽  
Vol 295 (1-2) ◽  
pp. 292-296 ◽  
Author(s):  
Daniele Antonangeli ◽  
Julien Siebert ◽  
James Badro ◽  
Daniel L. Farber ◽  
Guillaume Fiquet ◽  
...  
Keyword(s):  
High Pressure ◽  
Sound Velocity ◽  
Inner Core ◽  
Velocity Measurements ◽  
Earth’S Inner Core

The MPL sound velocimeter: An instrument for in situ sound velocity measurements in the deep ocean

1997 ◽  
Vol 102 (5) ◽  
pp. 3119-3119 ◽  
Author(s):  
Aaron D. Sweeney ◽  
Fred N. Spiess ◽  
Dwight E. Boegeman ◽  
David M. Jabson ◽  
Richard Zimmerman
Keyword(s):  
Sound Velocity ◽  
Deep Ocean ◽  
Velocity Measurements
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