Isothermal equation of state of crystalline and glassy materials from optical measurements in diamond anvil cells

2021 ◽  
Vol 92 (6) ◽  
pp. 063907
Author(s):  
T. Fedotenko ◽  
D. S. Souza ◽  
S. Khandarkhaeva ◽  
L. Dubrovinsky ◽  
N. Dubrovinskaia
Keyword(s):  
Equation Of State ◽  
Optical Measurements ◽  
Diamond Anvil Cells ◽  
Diamond Anvil ◽  
Glassy Materials ◽  
Isothermal Equation

scholarly journals Quasi-hydrostatic equation of state of silicon up to 1 megabar at ambient temperature

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Simone Anzellini ◽  
Michael T. Wharmby ◽  
Francesca Miozzi ◽  
Annette Kleppe ◽  
Dominik Daisenberger ◽  
...  
Keyword(s):  
Equation Of State ◽  
Room Temperature ◽  
Uniaxial Stress ◽  
Sample Volume ◽  
X Ray Diffraction ◽  
Experimental Conditions ◽  
X Ray ◽  
Pressure Medium ◽  
Diamond Anvil ◽  
Isothermal Equation

Abstract The isothermal equation of state of silicon has been determined by synchrotron x-ray diffraction experiments up to 105.2 GPa at room temperature using diamond anvil cells. A He-pressure medium was used to minimize the effect of uniaxial stress on the sample volume and ruby, gold and tungsten pressure gauges were used. Seven different phases of silicon have been observed along the experimental conditions covered in the present study.

Optical Measurements In High-Pressure Diamond-Anvil Cells

1980 ◽  
Author(s):  
D. H. Liebenberg ◽  
R. L. Mills ◽  
J. C. Bronson
Keyword(s):  
High Pressure ◽  
Optical Measurements ◽  
Diamond Anvil Cells ◽  
Diamond Anvil

Method of low-temperature optical measurements with diamond anvil cells

1990 ◽  
Vol 5 (1-6) ◽  
pp. 880-882 ◽  
Author(s):  
M. I. Eremets ◽  
O. A. Krasnovskij ◽  
V. V. Struzhkin ◽  
Ju. A. Timofeev ◽  
A. M. Shirokov
Keyword(s):  
Low Temperature ◽  
Optical Measurements ◽  
Diamond Anvil Cells ◽  
Diamond Anvil

scholarly journals Synthesis and Compressibility of Novel Nickel Carbide at Pressures of Earth’s Outer Core

Minerals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 516
Author(s):  
Timofey Fedotenko ◽  
Saiana Khandarkhaeva ◽  
Leonid Dubrovinsky ◽  
Konstantin Glazyrin ◽  
Pavel Sedmak ◽  
...  
Keyword(s):  
Equation Of State ◽  
Outer Core ◽  
Direct Reaction ◽  
Volume Data ◽  
X Ray Diffraction ◽  
Nickel Carbide ◽  
Diamond Anvils ◽  
Group A ◽  
Diamond Anvil ◽  
Murnaghan Equation

We report the high-pressure synthesis and the equation of state (EOS) of a novel nickel carbide (Ni3C). It was synthesized in a diamond anvil cell at 184(5) GPa through a direct reaction of a nickel powder with carbon from the diamond anvils upon heating at 3500 (200) K. Ni3C has the cementite-type structure (Pnma space group, a = 4.519(2) Å, b = 5.801(2) Å, c = 4.009(3) Å), which was solved and refined based on in-situ synchrotron single-crystal X-ray diffraction. The pressure-volume data of Ni3C was obtained on decompression at room temperature and fitted to the 3rd order Burch-Murnaghan equation of state with the following parameters: V0 = 147.7(8) Å3, K0 = 157(10) GPa, and K0' = 7.8(6). Our results contribute to the understanding of the phase composition and properties of Earth’s outer core.

scholarly journals Measurement of the sound velocity of shock compressed water

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Hua Shu ◽  
Jiangtao Li ◽  
Yucheng Tu ◽  
Junjian Ye ◽  
Junyue Wang ◽  
...  
Keyword(s):  
Experimental Data ◽  
Molecular Dynamics ◽  
Equation Of State ◽  
Liquid Water ◽  
Diamond Anvil Cell ◽  
Quantum Molecular Dynamics ◽  
Laser Shock ◽  
Diamond Anvil ◽  
Ionization Processes ◽  
Sound Velocities

AbstractThe sound velocities of water in the Hugoniot states are investigated by laser shock compression of precompressed water in a diamond anvil cell. The obtained sound velocities in the off-Hugoniot region of liquid water at precompressed conditions are used to test the predictions of quantum molecular dynamics (QMD) simulations and the SESAME equation-of-state (EOS) library. It is found that the prediction of QMD simulations agrees with the experimental data while the prediction of SESAME EOS library underestimates the sound velocities probably due to its improper accounting for the ionization processes.

Design and fabrication of a simple pneumatic loading attachment for diamond anvil cells

1999 ◽  
Vol 70 (7) ◽  
pp. 3074-3076 ◽  
Author(s):  
Ravhi S. Kumar ◽  
A. Sekar ◽  
N. Victor Jaya ◽  
S. Natarajan
Keyword(s):  
Diamond Anvil Cells ◽  
Diamond Anvil

In situ synchrotron X-ray diffraction with laser-heated diamond anvil cells study of Pt up to 95 GPa and 3150 K

RSC Advances ◽  
2015 ◽  
Vol 5 (19) ◽  
pp. 14603-14609 ◽  
Author(s):  
Xiaoli Huang ◽  
Fangfei Li ◽  
Qiang Zhou ◽  
Gang Wu ◽  
Yanping Huang ◽  
...  
Keyword(s):  
X Ray Diffraction ◽  
Diamond Anvil Cells ◽  
X Ray ◽  
Diamond Anvil ◽  
Laser Heated

In situ synchrotron X-ray diffraction with laser-heated diamond anvil cells study the EOS of Pt.

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