Argon
Argon (Ar) has a mass of 39.948 umas. Sadus and Prausnitz have shown that three-body repulsion makes a significant contribution to three-body interactions in the liquid phase ^{[1]} (for use of the Axilrod-Teller interaction see ^{[2]} ^{[3]}). However, the generic Lennard-Jones model has been frequently used due to its simplicity; some parameters are quoted in the next section. A specific interatomic potential for Ar has been proposed by Aziz ^{[4]}.
Contents
Thermophysical properties
Property ^{[5]} | Temperature | Pressure |
Triple point | 83.8058 K | 69 kPa |
Critical point | 50.87 K | 4.898 MPa |
Melting point | 83.80 K | |
Boiling point | 87.30 K |
Lennard-Jones parameters
The Lennard-Jones parameters for liquid argon are listed in the following table:
Authors | (K) | (nm) | Reference |
Rowley, Nicholson and Parsonage | 119.8 | 0.3405 | ^{[6]} |
Barker, Fisher and Watts | 142.095 | 0.33605 | ^{[7]} |
White | 125.7 | 0.3345 | ^{[8]} parameter set #4 |
Radial distribution function
Quantum simulations
References
- ↑ Richard J. Sadus and J. M. Prausnitz "Three-body interactions in fluids from molecular simulation: Vapor–liquid phase coexistence of argon", Journal of Chemical Physics 104 pp. 4784-4787 (1996)
- ↑ Phil Attard "Pair-hypernetted-chain closure for three-body potentials: Results for argon with the Axilrod-Teller triple-dipole potential", Physical Review A 45 pp. 3659-3669 (1992)
- ↑ J. A. Anta, E. Lomba and M. Lombardero "Influence of three-body forces on the gas-liquid coexistence of simple fluids: The phase equilibrium of argon", Physical Review E 55 pp. 2707-2712 (1997)
- ↑ Ronald A. Aziz "A highly accurate interatomic potential for argon", Journal of Chemical Physics 99 p. 4518 (1993)
- ↑ Argon physical properties en webelements
- ↑ L. A. Rowley, D. Nicholson and N. G. Parsonage "Monte Carlo grand canonical ensemble calculation in a gas-liquid transition region for 12-6 Argon", Journal of Computational Physics 17 pp. 401-414 (1975)
- ↑ J. A. Barker, R. A. Fisher and R. O. Watts "Liquid argon: Monte carlo and molecular dynamics calculations", Molecular Physics 21 pp. 657-673 (1971)
- ↑ John A. White "Lennard-Jones as a model for argon and test of extended renormalization group calculations", Journal of Chemical Physics 111 pp. 9352-9356 (1999)
Related material
- H. C. Longuet-Higgins and B. Widom "A rigid sphere model for the melting of argon", Molecular Physics 8 pp. 549-556 (1964)
- D. Henderson and J. A. Barker "On the solidification of argon", Molecular Physics 14 pp. 587-589 (1968)
- F. Lado "Numerical Calculation of the Density Autocorrelation Function for Liquid Argon", Physical Review A 5 pp. 2238-2244 (1972)