Determination of the Mode Grüneisen Parameter of AlN using different Fits on Experimental High Pressure Data

2002 ◽  
Vol 22 (1) ◽  
pp. 37-41 ◽  
Author(s):  
N.W.A. Van Uden ◽  
H. Hubel ◽  
J.M. Hayes ◽  
A.D. Prins ◽  
M. Kuball ◽  
...  
Keyword(s):  
High Pressure ◽  
Grüneisen Parameter ◽  
Pressure Data ◽  
Gruneisen Parameter

Measuring Grüneisen Parameter of Lead by High Pressure-Jump Method

2007 ◽  
Vol 24 (8) ◽  
pp. 2441-2443 ◽  
Author(s):  
Huang Dai-Hui ◽  
Liu Xiu-Ru ◽  
Su Lei ◽  
Hu Yun ◽  
Lv Shi-Jie ◽  
...  
Keyword(s):  
High Pressure ◽  
Pressure Jump ◽  
Grüneisen Parameter ◽  
Gruneisen Parameter

scholarly journals Thermoelastic properties of magnesiowüstite, (Mg1−xFex)O: determination of the Anderson–Grüneisen parameter by time-of-flight neutron powder diffraction at simultaneous high pressures and temperatures

2008 ◽  
Vol 41 (5) ◽  
pp. 886-896 ◽  
Author(s):  
Ian G. Wood ◽  
Lidunka Vočadlo ◽  
David P. Dobson ◽  
G. David Price ◽  
A. D. Fortes ◽  
...  
Keyword(s):  
Equation Of State ◽  
Powder Diffraction ◽  
High Pressures ◽  
Equations Of State ◽  
Time Of Flight ◽  
Neutron Powder Diffraction ◽  
Grüneisen Parameter ◽  
Gruneisen Parameter ◽  
Measured State

The ability to perform neutron diffraction studies at simultaneous high pressures and high temperatures is a relatively recent development. The suitability of this technique for determiningP–V–Tequations of state has been investigated by measuring the lattice parameters of Mg1−xFexO (x= 0.2, 0.3, 0.4), in the rangeP < 10.3 GPa and 300 <T< 986 K, by time-of-flight neutron powder diffraction. Pressures were determined using metallic Fe as a marker and temperatures were measured by neutron absorption resonance radiography. Within the resolution of the experiment, no evidence was found for any change in the temperature derivative of the isothermal incompressibility, ∂KT/∂T, with composition. By assuming that the equation-of-state parameters either varied linearly or were invariant with composition, the 60 measured state points were fitted simultaneously to aP–V–T–xequation of state, leading to values of ∂KT/∂T= −0.024 (9) GPa K−1and of the isothermal Anderson–Grüneisen parameter δT= 4.0 (16) at 300 K. Two designs of simultaneous high-P/Tcell were employed during this study. It appears that, by virtue of its extended pressure range, a design using toroidal gaskets is more suitable for equation-of-state studies than is the system described by Le Godec, Dove, Francis, Kohn, Marshall, Pawley, Price, Redfern, Rhodes, Ross, Schofield, Schooneveld, Syfosse, Tucker & Welch [Mineral. Mag.(2001),65, 737–748].

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