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. 2014 Apr 4;4:4440. doi: 10.1038/srep04440

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(a) Isobaric density variation for 10⁴ water molecule. Lines join simulated state points (~ 150 for each isobar). P increases from −0.5 (bottom curve) to 1.5 (top curve). Along each isobar we locate the maximum ρ (green squares at high T) and the minimum ρ (green small circles at low T) and the liquid-gas spinodal (open large circles at low P). (b) Loci of TMD, TminD, liquid-gas spinodal and liquid-liquid spinodal in T − P plane. Dashed lines with labels represent the isochores of the system from ρv₀ = 0.43 (bottom) to ρv₀ = 0.80 (top). Dashed lines without labels represent intermediate isochores. TMD and TminD correspond to the loci of minima and maxima, respectively, along isochores in the T − P plane. We estimate the critical isochore at ρv₀ ~ 0.47 (red circles). All the isochores with 0.47 < ρv₀ < 0.76 intersect with the critical isochore for along the LL spinodal (tick turquoise) line.

Inline graphic — (a) Isobaric density variation for 10⁴ water molecule. Lines join simulated state points (~ 150 for each isobar). P increases from −0.5 (bottom curve) to 1.5 (top curve). Along each isobar we locate the maximum ρ (green squares at high T) and the minimum ρ (green small circles at low T) and the liquid-gas spinodal (open large circles at low P). (b) Loci of TMD, TminD, liquid-gas spinodal and liquid-liquid spinodal in T − P plane. Dashed lines with labels represent the isochores of the system from ρv₀ = 0.43 (bottom) to ρv₀ = 0.80 (top). Dashed lines without labels represent intermediate isochores. TMD and TminD correspond to the loci of minima and maxima, respectively, along isochores in the T − P plane. We estimate the critical isochore at ρv₀ ~ 0.47 (red circles). All the isochores with 0.47 < ρv₀ < 0.76 intersect with the critical isochore for along the LL spinodal (tick turquoise) line.