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Article Dans Une Revue Physical Review Letters Année : 2011

Pressure-Induced Polyamorphism in SaltyWater

Résumé

We investigated the metastable phase diagram of an ionic salt aqueous solution, LiCl:6D2O, at high pressure and low temperature by neutron diffraction measurements and computer simulations. We show that the presence of salt triggers a stepwise transformation, under annealing at high pressure, to a new very high-density amorphous form. The transition occurs abruptly at 120 K and 2 GPa, is reversible, and is characterized by a sizeable enthalpy release. Simulations suggest that the polyamorphic transition is linked to a local structural reorganization of water molecules around the Li ions.
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Dates et versions

hal-00579881 , version 1 (25-03-2011)

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L. E. Bove, S. Klotz, J. Philippe, A. M. Saitta. Pressure-Induced Polyamorphism in SaltyWater. Physical Review Letters, 2011, 106, pp.125701. ⟨10.1103/PhysRevLett.106.125701⟩. ⟨hal-00579881⟩
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