Phase behavior of the system He-N2 at high pressures

W. L. Vos; L. C. van den Bergh; J. A. Schouten

doi:10.1007/BF00500704

Phase behavior of the system He-N₂ at high pressures

W. L. Vos^*, L. C. van den Bergh, J. A. Schouten

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

7 Citations (Scopus)

6 Downloads (Pure)

Abstract

Recent investigation at our institute revealed that the solid-fluid-fluid three-phase line of the system helium-nitrogen shows two quadruple points in the pressure range up to 10 GPa. Since each quadruple point is connected with four three-phase lines, the phase diagram is very complicated. We have detected the phase transitions representing solid-solid-fluid equilibria. Moreover, two lines of constant composition have been determined as a function of temperature and pressure. These results are discussed together with the implications for the phase diagram of both He-N₂ and pure nitrogen.

Original language	English
Pages (from-to)	15-25
Number of pages	11
Journal	International Journal of Thermophysics
Volume	10
Issue number	1
DOIs	https://doi.org/10.1007/BF00500704
Publication status	Published - 1 Jan 1989
Externally published	Yes

Keywords

binary mixtures
diamond anvil cell
helium
high pressure
nitrogen
phase equilibria

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abstract = "Recent investigation at our institute revealed that the solid-fluid-fluid three-phase line of the system helium-nitrogen shows two quadruple points in the pressure range up to 10 GPa. Since each quadruple point is connected with four three-phase lines, the phase diagram is very complicated. We have detected the phase transitions representing solid-solid-fluid equilibria. Moreover, two lines of constant composition have been determined as a function of temperature and pressure. These results are discussed together with the implications for the phase diagram of both He-N2 and pure nitrogen.",

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AU - van den Bergh, L. C.

AU - Schouten, J. A.

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N2 - Recent investigation at our institute revealed that the solid-fluid-fluid three-phase line of the system helium-nitrogen shows two quadruple points in the pressure range up to 10 GPa. Since each quadruple point is connected with four three-phase lines, the phase diagram is very complicated. We have detected the phase transitions representing solid-solid-fluid equilibria. Moreover, two lines of constant composition have been determined as a function of temperature and pressure. These results are discussed together with the implications for the phase diagram of both He-N2 and pure nitrogen.

AB - Recent investigation at our institute revealed that the solid-fluid-fluid three-phase line of the system helium-nitrogen shows two quadruple points in the pressure range up to 10 GPa. Since each quadruple point is connected with four three-phase lines, the phase diagram is very complicated. We have detected the phase transitions representing solid-solid-fluid equilibria. Moreover, two lines of constant composition have been determined as a function of temperature and pressure. These results are discussed together with the implications for the phase diagram of both He-N2 and pure nitrogen.

KW - binary mixtures

KW - diamond anvil cell

KW - helium

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KW - nitrogen

KW - phase equilibria

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