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Curved-Face Growth of NaNO3 Crystals

机译:NaNO3晶体的曲面生长

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Curved-face growth of NaNO_3 crystals under the action of the (NH_4)_2Mo_2O_7 impurity is studied experimentally and possible causes of face bending are analyzed. Selective impurity adsorption on the basal pinacoid results in growth of platelike crystals with spherically bent faces. Growth-rate measurements show that the impurity decelerates pinacoid-face growth by the Bliznakov kink-poisoning mechanism. Face bending can be explained by gradual deceleration of step growth by the impurities accumulated before step fronts. A model of step deceleration is suggested that is based on the assumption of slow impurity adsorption resulting in the instability of a step train. The model allows one to qualitatively interpret the experimental data.
机译:实验研究了在(NH_4)_2Mo_2O_7杂质的作用下NaNO_3晶体的曲面生长,并分析了可能导致面弯曲的原因。选择性吸附在基底类ac突上,导致具有球形弯曲面的板状晶体的生长。生长速率的测量表明,杂质通过Bliznakov扭结中毒机理使针状面的生长减速。可以通过在台阶前积累的杂质逐步降低台阶的生长速度来解释面弯曲。提出了一种基于零件缓慢吸收的假设而导致阶跃列车不稳定的阶跃减速模型。该模型允许人们定性地解释实验数据。

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