Elastic constants and anisotropy of MgSiO3 perovskite, periclase, and SiO2 at high pressure

1998 ◽  
pp. 83-96 ◽  
Author(s):  
Lars Stixrude
Keyword(s):  
High Pressure ◽  
Elastic Constants ◽  
Mgsio3 Perovskite

The Inductive Coil Technique for High-Pressure Measurements: An Analysis of Nonhomogeneous Material Environment as a Source of Irreproducibility and Error

1967 ◽  
Vol 89 (3) ◽  
pp. 554-560 ◽  
Author(s):  
A. A. Giardini
Keyword(s):  
High Pressure ◽  
Internal Pressure ◽  
Elastic Constants ◽  
Graphical Form ◽  
Pressure Measurements ◽  
Pressure Data ◽  
Nonhomogeneous Material ◽  
Resistivity Measurements ◽  
Material Environment ◽  
Critical Yield

Significant sources of error independent of the apparatus are analyzed on the basis of experimental experience and elastic theory. All are mechanical in nature and subject to corrective action. The most serious is found to be self-generating internal pressure differences which result from differential elastic and dimensional values in multicomponent assemblies. High-pressure data on elastic constants, relative critical yield stresses, radial displacements, and ratios of external to internal pressure for various compositional arrangements of pyrophyllite, MgO, NaCl, and AgCl are given in graphical form. Observance of suggested corrective measures can render the inductive coil technique capable of operational accuracies of 2 percent or better in compressibility and resistivity measurements.

scholarly journals Role of temperature in the numerical analysis of CaO under high pressure

2010 ◽  
Vol 8 (1) ◽  
pp. 126-133 ◽  
Author(s):  
Purvee Bhardwaj ◽  
Sadhna Singh
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
Numerical Analysis ◽  
Thermodynamic Properties ◽  
Elastic Constants ◽  
Volume Change ◽  
Thermodynamical Properties ◽  
Phase Transition Pressure ◽  
Different Temperatures

AbstractIn this paper we focus on the elastic and thermodynamic properties of the B1 phase of CaO by using the modified TBP model, including the role of temperature. We have successfully obtained the phase transition pressure and volume change at different temperatures. In addition elastic constants and bulk modulus of B1 phase of CaO at different temperatures are discussed. Our results are comparable with the previous ones at high temperatures and pressures. The thermodynamical properties of the B1 phase of CaO are also predicted.

High Pressure Elastic Constants of NaCl

1989 ◽  
Vol 156 (1) ◽  
pp. K27-K32
Author(s):  
B. Srinivasa Rao ◽  
S. P. Sanyal
Keyword(s):  
High Pressure ◽  
Elastic Constants

scholarly journals Sound velocities and Debye temperature of BeSe under high pressure up to 50 GPa

2016 ◽  
Vol 5 (1) ◽  
pp. 7
Author(s):  
Salah Daoud
Keyword(s):  
High Pressure ◽  
Elastic Wave ◽  
Mechanical Behavior ◽  
Debye Temperature ◽  
Elastic Constants ◽  
Structural Parameters ◽  
Theoretical Data ◽  
Elastic Wave Velocity ◽  
Brittle Behavior ◽  
Sound Velocities

The mechanical behavior, sound velocities and Debye temperature of beryllium-selenide (BeSe) semiconductor under pressure up to 50 GPa have been estimated using the structural parameters and elastic constants of Fanjie Kong and Gang Jiang (Physica B 404 (2009) 3935-3940). The Pugh ratio, the directional dependence of elastic wave velocity, the longitudinal, transverse and average sound velocities, and the Debye temperature are successfully predicted and analyzed in comparison with the available theoretical data. The analysis of the Pugh ratio indicates that this compound is prone to brittle behavior. Our obtained results of the longitudinal, transverse and average sound velocities at high pressure indicate that these of Kong and Jiang (Physica B 404 (2009) 3935-3940) are not correctly predicted.

Structural and thermodynamic properties of MgSiO3 perovskite under high pressure and high temperature

2007 ◽  
Vol 144 (5-6) ◽  
pp. 264-268 ◽  
Author(s):  
Zi-Jiang Liu ◽  
Xiao-Wei Sun ◽  
Xiao-Ming Tan ◽  
Yun-Dong Guo ◽  
Xiang-Dong Yang
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Thermodynamic Properties ◽  
Mgsio3 Perovskite

scholarly journals First-principles elastic constants for the hcp transition metals Fe, Co, and Re at high pressure

1999 ◽  
Vol 60 (2) ◽  
pp. 791-799 ◽  
Author(s):  
Gerd Steinle-Neumann ◽  
Lars Stixrude ◽  
Ronald E. Cohen
Keyword(s):  
High Pressure ◽  
Transition Metals ◽  
Elastic Constants ◽  
First Principles
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