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

Abstract

Abstract.In this paper we focus on the measurement of the normal growth rates (R 104 ) of 10.4 faces of nitratine (NaNO 3 ) single crystals under isothermal conditions in the temperature interval 288  297. 5K 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 NaNO 3 under different hydrodynamic conditions. We found that growth of these faces depend 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.

Effect of surfactant on the morphology of ZnO nanopowders and their application for photodegradation of rhodamine B

“…The growth habit and morphology of crystal depends on the relative growth rate of different faces of crystal [20][21][22]. Fig.5a shows a schematic diagram of Sample 1#…”

Morphology Change of Nitratine (NaNO3) from Aqueous Solution, in the Presence of Li+ and K+ Ions

“…[12][13][14] As calcite and II-NaNO 3 are isostructural we decided to try lithium carbonate as modifier of sodium nitrate morphology. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 7 For crystal growth measurements we used the device built for measuring the pure NaNO 3 growth rate described elsewhere, 15 while here we added different amounts of KNO 3 or LiNO 3 as impurities to determine the variation in the advancement rate of the crystal faces.…”

Measurement of Crystal Face Specific Growth Kinetics

“…A valuable study on the growth behavior of sodium nitrate crystals was reported by Benages-Vilau et al 26 , though they only examined growth rates of NaNO3 (104) With up to 5 captured frames per second, the system can meet the needs of general crystal growth measurement. To achieve an accurate measurement requires that at least certain number of, say, 5 frames were captured during the whole growing process.…”

“…Benages-Vilau et al 26 also glued the seed crystal on a sample holder with roughly the same solution velocity. The growth rate data obtained is coincident with this study in magnitude, but the supersaturation range studied is below 0.01.…”