Compression Isotherms of Argon, Krypton, and Xenon Through the Freezing Zone.

Lahr, Paul H.; Eversole, W. G.

doi:10.1021/je60012a012

Cited by 92 publications

(22 citation statements)

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“…Both recent calculations on xenon [44] and DAC experimental results for tantalum [45] indicate that the deviation of the melt curve from the Simon law at high pressure is much less than measured in some DAC experiments, such as the one reported for argon. iments [39,40] are shown as green exes and three DAC experiments are shown as magenta triangles [41], blue circles [42], and red squares [43]. Line shows a fit to the data below 50 GPa using Eq.…”

Section: Phase Transition Datamentioning

confidence: 99%

Equation of state of argon : experiments on Z, density functional theory (DFT) simulations, and wide-range model.

Carpenter¹,

Root²,

Cochrane³

et al. 2012

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Over the last few years, first-principles simulations in combination with increasingly accurate shock experiments at multi-Mbar pressure have yielded important insights into how matter behaves under shock loading. Noble gases like argon are particularly interesting to study as a model system due to the closed shell electronic structure that results in a weak interatomic interaction at normal conditions followed by pronounced ionization and strong interaction under compression. Cryogenic argon is also optically transparent while shocked argon is metallic, displaying a reflective shock front, thus allowing for shock velocity measurement to very high precision. In this report, we present experimental results for shock compression of liquid cryogenic argon to several Mbar using magnetically accelerated flyers on the Z machine, first-principles simulations based on Density Functional Theory, and an analysis of tabular equations of state (EOS) for argon, including a newly developed wide-range EOS model. 3 AcknowledgmentWe sincerely thank the many devoted specialists with Z-Operations who are involved in planning and executing experiments on the Z-machine. We thank the cryogenic team: Andrew Lopez, Keegan Shelton, and Jose Villalva for installing and running the cryostat. We thank Aaron Bowers, Nicole Cofer, and Jesse Lynch for assembling the cryo-targets. We thank Charlie Meyers for running the VISAR diagnostics and Devon Dalton for handling target design.4

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Section: Phase Transition Datamentioning

confidence: 99%

Equation of state of argon : experiments on Z, density functional theory (DFT) simulations, and wide-range model.

Carpenter¹,

Root²,

Cochrane³

et al. 2012

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“…Table 1 systematizes the experimental data in the literature from 1940 onwards. The results from references [32][33][34][35] were used to determine a first approximation to the values of parameters a and c in the Simon equation for the fusion of the fcc-phase which is, no doubt, the stable solid form under relatively lower temperatures and pressures. The extrapolation to higher temperatures and pressures of the first form of the equation so obtained showed that it also fits the two experimental points due to Jephcoat and Besedin [8] and those measured by Boehler et al [9] at temperatures up to about 2800 K. This observation led us to include the 16 points at the lower temperatures reported in reference [9] and the two points mentioned in reference [8] to obtain a second, better, approach to the fusion curve equation of the fcc-solid phase of xenon.…”

Section: Xenonmentioning

confidence: 99%

“…Clusius used a somewhat peculiar lead thermometer. In reference [35] the temperatures are given at integer figures. Boehler et al [9] mention that the precision of their temperature measurements is ±10 K, with an uncertainty of the order of 100 K at the highest temperature.…”

Section: Kryptonmentioning

confidence: 99%

The fusion curves of xenon, krypton, and argon

Ferreira

Lobo

2008

The Journal of Chemical Thermodynamics

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The experimental results on the fusion of the heavier rare gases at very high pressures, obtained in the last 20 years, are examined and analysed in conjunction with the measurements made at lower pressures from 1940 onwards. The parameters in the Simon equation for the melting curves of Xe, Kr, and Ar are determined, and the coordinates of a possible high-pressure {s(fcc) + s(hcp) + '} triple-point are identified for each one of these three elements. The enthalpies of transition of the transformations involved are estimated as well as their respective values of the entropies of transition.

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“…2: a = 8.32 nm, h/a = 0.387 and F" 0 1F I = 1.05. The pressure for solid to fluid transition of bulk Xe under isothermal compression at 293 K is 0.41 GPa [10]. From equation 2 with the Laplace pressure P = 0.41 GPa, we thus deduce F.. to be 1.00 J m 2 and F 2 "' to be 1.05 J m -2 .…”

Section: Resultsmentioning

confidence: 77%

What Xe Nanocrystals in Al Can Teach us in Materials Science

et al. 2001

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To order the complete compilation report, use: ADA401575The component part is provided here to allow users access to individually authored sections f proceedings, annals, symposia, etc. However, the component should be considered within [he context of the overall compilation report and not as a stand-alone technical report. ABSTRACTNoble gases are generally very insoluble in solids. For example, Xe implanted into Al at 300 K forms a fine dispersion of crystalline precipitates and, at large enough fluence, fluid precipitates, both of which are stabilized, relative to the gas phase, by the Laplace pressure due to precipitate/matrix interface tensions. High resolution electron microscopy has been performed to determine the largest Xe nanocrystalline precipitate in local equilibrium with fluid Xe precipitates within the Al matrix. From the shape and size of the largest crystal and the Laplace pressure associated with its interface, we show that the interface tensions can be derived by setting the Laplace pressure equal to the pressure for solid/fluid Xe equilibrium derived from bulk Xe compression isotherms at the temperature of equilibration and observation. The Xe/Al interface tensions thus derived are in the range of accepted values of surface tensions for the Al matrix. Furthermore, it is suggested that this same technique may be employed to estimate unknown surface tensions of a solid matrix from the size and shape of maximal nanocrystals of a noble gas element, which have been equilibrated in that matrix at the temperature of observation.

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Compression Isotherms of Argon, Krypton, and Xenon Through the Freezing Zone.

Cited by 92 publications

References 1 publication

Equation of state of argon : experiments on Z, density functional theory (DFT) simulations, and wide-range model.

Equation of state of argon : experiments on Z, density functional theory (DFT) simulations, and wide-range model.

The fusion curves of xenon, krypton, and argon

What Xe Nanocrystals in Al Can Teach us in Materials Science

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