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Chapter II Solution Growth….
period and nucleation parameters of ADP crystals were reported by Rajesh et
al [121]. They evaluated the critical parameters based on classical theory and
concluded that the parameters increased on increasing doping concentration.
Altogether, Rajesh et al [122] reported the nucleation studies of ADP doped
with thiourea. They also found, as in their earlier studies, by urea doping in ADP
the increase in the values of induction period and critical nucleation parameters
on increasing the concentration of doping.
Moreorless, the similar results were obtained for MgSO4 . 7H2O crystals
doped with KCl, KNO3, urea and thio-urea [123]. The critical parameters
increased as the concentration of dopants increased.
2.26 Nucleation Studies of Pure and Amino Acids Doped KDP
From the solubility curves of figure (2.10), pure KDP, 0.3 wt % L-
histidine, 0.3 wt % L – threonine and 0.3 wt % DL – methionine doped KDP
crystals; it is observed that the solubility of both pure and amino acids doped
KDP increase with increase in temperature, which is in accordance with
previously reported results for KDP [46]. It has also been observed that the
solubility of KDP increases with doping of different amino acids. To study the
effect of super-saturation on induction period, experiments were conducted for
various level of super-saturations (S = 1.2 to 1.5) at a 35 0 C temperature. The
data are presented in table (2.2).
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