Coexistence of Different Growth Mechanisms of Sodium Chlorate under the Same Experimental Conditions

Abstract

Dependence of growth rates of {100} sodium chlorate crystal faces on solution supersaturation in the range of 0.44–1.32% was analyzed. It has been shown that the growth rate dispersion does not have a consequence only in the growth parameter differences predicted by specific crystal growth theory but that individual crystal faces may grow with different mechanisms under the same experimental conditions. The majority of the observed {100} sodium chlorate crystal faces grew in accordance with the power law R ∼ σ n , whereas approximately one-third of them grew in accordance with BCF or Chernov’s theories. Possible reasons for this as well as for the coexistence of crystal faces, which grew with different mechanisms under the same conditions, have been discussed.

Influence of a Static Magnetic Field on the ⟨100⟩ Growth Rates of Sodium Chlorate Crystals from Aqueous Solution

“…It was recently shown that the {100} faces of sodium chlorate crystals can grow by different mechanisms in the supersaturation range of 0.44–1.32%. 17 The functions describing the spiral growth were found to be practically linear for supersaturations higher than 0.89% ( Figure 2 ). 17 Negative values of the growth rate have no physical meaning, but in theories of spiral growth, the intercept of the linear function with the abscissa has the meaning of critical supersaturation, σ c .…”

“…The functions describing the spiral growth were found to be practically linear for supersaturations higher than 0.89% (Figure ). Negative values of the growth rate have no physical meaning, but in theories of spiral growth, the intercept of the linear function with the abscissa has the meaning of critical supersaturation, σ c . Its estimated value for the experiments presented is 0.19%.…”

“…The increase in mean growth rates caused by the magnetic field is equivalent to the effect of increase in the saturation temperature of the solution. It was recently shown that the {100} faces of sodium chlorate crystals can grow by different mechanisms in the supersaturation range of 0.44–1.32% . The functions describing the spiral growth were found to be practically linear for supersaturations higher than 0.89% (Figure ).…”

Reproducible high-quality perovskite single crystals by flux-regulated crystallization with a feedback loop

“…A feedback system was applied to regulate the growth rate of an anchored crystal which served as an indicator for controlling growth conditions of suspended target crystals in the same solution. However, the work acknowledged that controlling of the indicator crystal does not necessarily ensure the quality of the target crystals because different growth mechanisms can coexist within the same solution 31 , and did not study the correlation between linear growth rate and crystal quality. Moreover, the longest growth time was only 6 h, resulting in target crystal sizes remaining <1 mm.…”