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Chapter II Solution Growth….<br />

The growth habits of pure KDP crystals are platelet type with both prismatic<br />

and pyramidal face type and doping of amino acids does not change habits of<br />

KDP crystals. For example 0.3 wt % amino acid doped KDP crystals palate<br />

type habits are shown in figure 2.12 (a-d). Figure (2.13) shows the schematic<br />

diagram of observed habit of KDP crystals with indications of Millar indices of<br />

major faces.<br />

Figure :2.13 Schematic diagram of observed habit of KDP crystal.<br />

2.16 Nucleation Study<br />

As it has been discussed in section 2.2 that the nucleation is very<br />

important in crystal growth process and hence it is briefly reviewed hrerby.<br />

Nucleation is an early phenomenon in the growth of crystals irrespective of<br />

the starting materials from which the crystals grow and its study is very<br />

important to control the growth of crystals. A knowledge of the nucleation<br />

process leads to an understanding of many natural and industrial processes.<br />

Nucleation plays important role in different engineering processes where<br />

condensation, boiling, crystallization, sublimation and catalytic processes<br />

occur.<br />

Nucleation is the process of generating a meta-stable mother phase,<br />

the initial fragments of a new and more stable phase capable of developing<br />

spontaneously into gross fragments of the stable phase. Nucleation is<br />

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