AN EXPERIMENTAL EQUATION OF STATE FOR SOLID XENON
The pressure-volume-temperature relation for solid xenon was determined to 20 kbars pressure from 20 to 160 deg K. Approximate values for the zero pressure thermal expansion and bulk modulus are given, along with their pressure dependence. The extrapolated absolute zero P- V isotherm cannot be fitted by a theoretical curve based on a Lennard-Jones 6-12 potential, and the solid appears to be more compressible at high pressures than the theory would predict. The temperature-dependent contributions to the equation of state are small and cannot be determined with precision. The thermal pressure P* is approximately independent of volume at constant temperature, although it appears to decrease slightly with decreasing volume. This implies that the bulk modulus tends to decrease with increasing temperature at constant volume. Various inconsistencies in the thermodynamic data and definitions of the Grueneisen constant ate discussed. The only general conclusion that can be drawn is that for temperatures greater than theta /sub D/ the Grueneisen constant is apparently a linear function of the molar volume at constant temperature. (auth)
- Research Organization:
- Ames Lab., Ames, Iowa
- NSA Number:
- NSA-18-010086
- OSTI ID:
- 4092066
- Report Number(s):
- IS-663
- Journal Information:
- Phys. Chem. Solids , Journal Name: Phys. Chem. Solids Vol. Vol: 24
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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