Elastic Moduli of Silicon vs Hydrostatic Pressure at 25.0°C and − 195.8°C

1964 ◽  
Vol 35 (7) ◽  
pp. 2161-2165 ◽  
Author(s):  
H. J. McSkimin ◽  
P. Andreatch
Keyword(s):  
Hydrostatic Pressure ◽  
Elastic Moduli

scholarly journals Electronically driven collapse of the bulk modulus inδ-plutonium

2020 ◽  
Vol 117 (9) ◽  
pp. 4480-4485 ◽  
Author(s):  
Neil Harrison
Keyword(s):  
Thermal Expansion ◽  
Hydrostatic Pressure ◽  
Bulk Modulus ◽  
Elastic Moduli ◽  
Elevated Temperatures ◽  
Thermally Activated ◽  
Δ Phase ◽  
Electronic Configurations ◽  
Plutonium Metal ◽  
Good Agreement

Plutonium metal exhibits an anomalously large softening of its bulk modulus at elevated temperatures that is made all the more extraordinary by the finding that it occurs irrespective of whether the thermal expansion coefficient is positive, negative, or zero—representing an extreme departure from conventional Grüneisen scaling. We show here that the cause of this softening is the compressibility of plutonium’s thermally excited electronic configurations, which has thus far not been considered in thermodynamic models. We show that when compressible electronic configurations are thermally activated, they invariably give rise to a softening of the bulk modulus regardless of the sign of their contribution to the thermal expansion. The electronically driven softening of the bulk modulus is shown to be in good agreement with elastic moduli measurements performed on the gallium-stabilized δ phase of plutonium over a range of temperatures and compositions and is shown to grow rapidly at small concentrations of gallium and at high temperatures, where it becomes extremely sensitive to hydrostatic pressure.

Elastic Moduli of Quartz versus Hydrostatic Pressure at 25° and − 195.8°C

1965 ◽  
Vol 36 (5) ◽  
pp. 1624-1632 ◽  
Author(s):  
H. J. McSkimin ◽  
P. Andreatch ◽  
R. N. Thurston
Keyword(s):  
Hydrostatic Pressure ◽  
Elastic Moduli

scholarly journals Complete determination of the elastic moduli of α-quartz under hydrostatic pressure up to 1 GPa: an ultrasonic study

2007 ◽  
Vol 19 (43) ◽  
pp. 436228 ◽  
Author(s):  
Ernesto Calderon ◽  
Michel Gauthier ◽  
Frédéric Decremps ◽  
Gérard Hamel ◽  
Gérard Syfosse ◽  
...  
Keyword(s):  
Hydrostatic Pressure ◽  
Elastic Moduli ◽  
Ultrasonic Study ◽  
Complete Determination

Hydrostatic Pressure Derivatives of the Single‐Crystal Elastic Moduli of Zirconium

1970 ◽  
Vol 41 (7) ◽  
pp. 2991-2998 ◽  
Author(s):  
E. S. Fisher ◽  
M. H. Manghnani ◽  
T. J. Sokolowski
Keyword(s):  
Hydrostatic Pressure ◽  
Single Crystal ◽  
Elastic Moduli ◽  
Derivatives Of
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