Abstract
In the last decade, a considerable body of accurate high pressure thermodynamic data has been reported for solid argon [1].* Careful measurement of the equation of State (EOS) by piston displacement techniques to 20 kbar, first made by Stewart [2] and recently by Anderson and Swenson [3], agree within 3%. The latter data [3] has an estimated accuracy of ± 0.1% in the T = 0 equilibrium molar volume V, and the agreement with the lower pressure isochoric data of Lewis et al. [4] is within their combined experimental uncertainties. This high degree of agreement has led Anderson and Swenson to propose a Lennard-Jones type EOS for the temperature range up to the melting point. Their results suggest that argon obeys a reduced EOS at both T = 0 and near the triple point, which is similar to the EOS of the other rare gas solids, krypton and xenon.
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References
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Homan, C.G., Frankel, J., Kendall, D.P., Barrett, J.A., Davidson, T.E. (1979). Acoustic Velocity Ratios in Solid Argon at 75 K up to Static Pressures of 150 Kbar. In: Timmerhaus, K.D., Barber, M.S. (eds) High-Pressure Science and Technology. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-7470-1_41
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DOI: https://doi.org/10.1007/978-1-4684-7470-1_41
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