Behavior of Salts - Slow vs. Rapid Drying


ESEM Clip 5:  Slow and Fast deliquescence and crystallization sequences for Sodium Nitrate.

Tiziana Lombardo & Eric Doehne

Keywords:  Sodium nitrate chloride solution; NaCl; Halite, NaNO3, ESEM, Deliquescence, Crystallization

Note formation of salt crust in second sequence after rapid RH decrease, continued crystallization and subsequent fracturing of the salt crust. This behavior suggests that the seal provided by the salt crust encapsulated the remaining fluid and was sufficient to withstand some initial hydraulic pressure as the fluid/crystal volume evolved.

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