Scientists have identified a new state of liquid water

Despite its extremely widespread occurrence, water as a chemical is still not fully

studied. Scientists sometimes call it the most mysterious substance on Earth.

Specialists from the Pacific NorthwestNational Laboratory (PNNL) of the US Department of Energy destroyed a thin ice film with a laser, creating supercooled liquid water, after which, using infrared spectroscopy, the stages of its transformations were tracked in the range from -138 to -28 degrees Celsius.

On the “freeze frames” of phase states, scientistssaw that during supercooling, water condenses into a dense liquid phase, which continues to coexist with the usual liquid phase. In this case, the proportion of liquid with a high density decreases rapidly as the temperature rises from 190 to 245 Kelvin.

We have shown that liquid water at very lowtemperatures are not only relatively stable, but also exists in two structural forms. The findings help resolve a long-standing debate about whether deeply supercooled water always crystallizes before it equilibrates. The answer is no.

Greg Kimmel, one of the study authors

According to the data obtained, water is not alwayscrystallizes on hypothermia before equilibrating. Supercooled water can be in a stable two-phase liquid-liquid state, and the phase ratio varies with temperature.

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