Phase equilibria in the system Ne-Xe at high pressures

L.C. van den Bergh, J.A. Schouten and N.J. Trappeniers

Physica A: Statistical Mechanics and its Applications, 1985, vol. 132, issue 2, 537-548

Abstract: The phase behaviour of the system neon-xenon has been studied in a diamond anvil cell at pressures up to 20kbar. By visual observation of the mixtures, the phase transition of the homogeneous gas phase to fluid-fluid equilibrium has been detected as a function of pressure and temperature, with an overall composition ranging from 14% to 53% xenon. The measurements reveal that the critical line of neon-xenon moves continuously from the critical double point of the system to higher pressures and higher temperatures. Asymptotic behaviour of the critical line or the existence of a second critical double point cannot be observed because the measurements of the gas-gas equilibrium are restricted by the appearance of the melting surface of the mixture. A strong shift of the critical concentration as a function of pressure and temperature was observed from 36% xenon at 3 kbar and 7°C to 26% at 18 kbar and 142°C.

Date: 1985
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:132:y:1985:i:2:p:537-548

DOI: 10.1016/0378-4371(85)90025-1

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