Size Effect in Metastable Water

Abstract : We experimentally determined the maximum tension in synthetic fluid inclusions from the differ ence between the temperatures of homogenization (Th) and spontaneous vapor nucleation (Tn). At temper atures of 100-200°C, liquid water may exist at negative pressures of up to 100-150 MPa. Owing to an increase in surface tension, the effect is even more significant in salt solutions and occurs at higher tempera tures. A decrease in the linear dimension of fluid phase by an order of magnitude and, correspondingly, a three orders of magnitude decrease in volume (which is proportional to R3) increase the maximum tension by ~25MPa. Tension in the liquid phase of water-salt systems may be higher than ~200 MPa without cavitation. Metastability of water and salt solutions in small sized vacuoles generates stresses in the fluid-mineral system resulting in high solubilities of solid phases. An increase in volume due to coalescence of small inclusions or vanishing of metastability results in an abrupt decrease in supersaturation.
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Kirill Shmulovich, Lionel Mercury. Size Effect in Metastable Water. Petrology, MAIK Nauka/Interperiodica, 2014, 22 (4), pp.418-428. ⟨10.1134/S0869591114030060⟩. ⟨insu-01018693⟩

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