# ST2 model of water

ST2 is a model for simulations of water [1]. The ST2 model is based on the earlier Ben-Naim and Stillinger model, known as the BNS model.

## Liquid-liquid critical point

The ST2 model has a liquid-liquid transition [2]. Liu, Panagiotopoulos, and Debenedetti [3] have located the critical point of the liquid-liquid transition of the ST2 model [4] to be at a temperature of $T_c = 237 \pm 4 ~\mathrm{K}$, a density of $\rho_c = 0.99 \pm 0.02 ~\mathrm{g/cm}^3$ and a pressure of $p_c = 167 \pm 24 ~\mathrm{MPa}$. This finding is supported in the work of Sciortino, Saika-Voivod and Poole [5].

[6].