Kinetics of the growth of filamentary KH2PO4 crystals on a seed crystal

Resumo

At oversaturations exceeding the inert range end for face {101} due to the presence of admixture Al(NO₃)₃ · 9H₂O, a new phase is observed during the growth of this face in the form of filamentary crystals. Some experimental dependences of the growth rate of filamentary potassium dihydrophosphate (KH₂PO₄) crystals on the oversaturation have been obtained at different admixture concentrations. The growth of filamentary crystals occurs by the mechanism of two-dimensional nucleation. Their formation is governed by the effect of [AlHPO₄]⁺ complexes in the form of Cabrera and Vermilyea stoppers.