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The Lennard-Jones model for 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].

Thermophysical properties

Property [5] Temperature Pressure
Triple point 83.8058 K 69 kPa
Critical point 150.87 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 \epsilon/k_B (K) \sigma (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

Radial distribution function

Quantum simulations


Related material

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