Growth Kinetics of the {10.4} Faces of Nitratine (NaNO3)

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• 作者：Ra煤l Benages-Vilau ; Marco Rubbo ; Teresa Calvet ; Miquel 脌ngel Cuevas-Diarte ; Dino Aquilano
• 刊名：Crystal Growth & Design
• 出版年：2013
• 出版时间：August 7, 2013
• 年：2013
• 卷：13
• 期：8
• 页码：3419-3428
• 全文大小：420K
• 年卷期：v.13,no.8(August 7, 2013)
• ISSN：1528-7505

文摘

In this paper, we focus on the measurement of the normal growth rates (R₁₀₄) of {10.4} faces of nitratine (NaNO₃) single crystals under isothermal conditions in the temperature interval 288鈥?97.5 K in order to unravel the rate determining steps during crystal growth, depending on the hydrodynamic conditions. Owing to the elevated solubility of nitratine in water, the supersaturated system is very sensitive to temperature variation. In this sense, we have constructed a device to control the temperature (its accuracy is below 0.1 K) and the concentration throughout the experiments. We managed to measure the crystal growth of three symmetry equivalent {10.4} faces of NaNO₃ under different hydrodynamic conditions. We found that growth of these faces depends on different rate determining steps (being either surface or volume diffusion limited) according to their position with respect to the solution flow. Finally, some thermodynamic crystallization parameters have been calculated to assess the rate determining steps.