Accuracy in measurements and the temperature and volume dependence of thermoelastic parameters |
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| Authors: | Orson L Anderson Donald G Isaak |
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| Institution: | (1) Center for Chemistry and Physics of Earth and Planets, Institute of Geophysics and Planetary Physics, UCLA, 90024-1567 Los Angeles, CA, USA;(2) Azusa Pacific University, Azusa, USA |
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| Abstract: | To obtain the temperatureT and volumeV (or pressureP) dependence of the Anderson-Grüneisen parameter 
T
, measurements with high sensitivity are required. We show two examples:P, V, T measurements of NaCl done with the piston cylinder and elasticity measurements of MgO using a resonance method. In both cases, the sensitivity of the measurements leads to results that provide information about
T
( ,T), where  V/V
0 andV
0 is the volume at zero pressure. We demonstrate that determination of
T
leads to understanding of the volume and temperature dependence ofq=( ln  / lnV)
T
over a broadV, T range, where is the Grüneisen ratio. |
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| Keywords: | Elasticity thermoelasticity piston-cylinder rectangular parallepiped resonance MgO NaCl Anderson-Grü neisen parameter equation of state |
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