This is a noncubic EOS consisting of a soft-sphere repulsion (obtained by applying the Maxwell distribution method to a truncated Mie m/n potential) and a modified Redlich-Kwong attraction term (Hederer's improved temperature dependence).

The soft repulsion improves the representation of caloric data at high pressures.

adjustable parameters: 5

[1] U. K. Deiters, Mol. Phys. 74 (1991) 153–160.

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