We investigate a LiCl:6D2O water solution in the deep undercooled regime as a function of pressure by neutron diffraction, small angle neutron scattering, and molecular dynamics simulations. We probe the structure of the undercooled liquid and the existence of density fluctuations in the system along isotherms just above the observed first-order-like polymorphic transition in the solid between a high density amorphous (s-HDA) and a very high density amorphous (s-VHDA) form [L. E. Bove et al., Phys. Rev. Lett. 106, 125701 (2011)]. We observe a continuous pressure evolution of the structure factor of the liquid and the absence of density fluctuations when crossing the continuation line of the s-HDA and s-VHDA boundary. These results indicate that no liquid-liquid transition is observed in the system in correspondence with the solid polyamorphism.
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28 July 2019
Research Article|
July 29 2019
On the link between polyamorphism and liquid-liquid transition: The case of salty water
Special Collection:
Chemical Physics of Supercooled Water
Livia E. Bove
;
Livia E. Bove
a)
1
Dipartimento di Fisica, Università di Roma ‘La Sapienza’
, 00185 Roma, Italy
2
Sorbonne Université, CNRS UMR 7590, IMPMC
, 75005 Paris, France
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Fabio Pietrucci
;
Fabio Pietrucci
2
Sorbonne Université, CNRS UMR 7590, IMPMC
, 75005 Paris, France
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A. Marco Saitta
;
A. Marco Saitta
2
Sorbonne Université, CNRS UMR 7590, IMPMC
, 75005 Paris, France
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Stefan Klotz
;
Stefan Klotz
2
Sorbonne Université, CNRS UMR 7590, IMPMC
, 75005 Paris, France
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José Teixeira
José Teixeira
3
Laboratoire Léon Brillouin (CEA/CNRS), CEA Saclay
, 91191 Gif-sur-Yvette Cedex, France
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Note: This paper is part of a JCP Special Topic on Chemical Physics of Supercooled Water.
J. Chem. Phys. 151, 044503 (2019)
Article history
Received:
April 22 2019
Accepted:
June 28 2019
Citation
Livia E. Bove, Fabio Pietrucci, A. Marco Saitta, Stefan Klotz, José Teixeira; On the link between polyamorphism and liquid-liquid transition: The case of salty water. J. Chem. Phys. 28 July 2019; 151 (4): 044503. https://doi.org/10.1063/1.5100959
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