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arXiv · 1311.1623

Anomalies in bulk supercooled water at negative pressure

Gaël Pallares·Mouna El Mekki Azouzi·Miguel Angel Gonzalez·Juan Luis Aragones·Jose Luis F. Abascal·Chantal Valeriani·Frédéric Caupin
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Abstract

Water is the most familiar liquid, and arguably the most complex. Anomalies of supercooled water have been measured during decades, and competing interpretations proposed. Yet, a decisive experiment remains elusive, because of unavoidable crystallization into ice. We investigate the state of water that is both supercooled and under mechanical tension, or negative pressure. Liquids under negative pressure can be found in plants or fluid inclusions in minerals. Using such water inclusions in quartz, we report the first measurements on doubly metastable water down to $-15^\circ\mathrm{C}$ and around $-100\,\mathrm{MPa}$. We observe sound velocity anomalies that can be reproduced quantitatively with molecular dynamics simulations. These results rule out one proposed scenario for water anomalies, and put further constraints on the remaining ones.

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Gaël Pallares, Mouna El Mekki Azouzi, Miguel Angel Gonzalez, Juan Luis Aragones, Jose Luis F. Abascal, Chantal Valeriani, Frédéric Caupin. 2013-11-27. Anomalies in bulk supercooled water at negative pressure. https://doi.org/10.1073/pnas.1323366111

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