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Chapter II Solution Growth….<br />

Figure: 2.5 Growth spirals.<br />

A theory of crystal growth, incorporating the mechanism of step<br />

generation and transport into the step, was given by Burton, et al [21] in 1951,<br />

in their celebrated paper. This theory has gained importance because much of<br />

the content will apply to any theory of crystal growth. Verma [5] has<br />

elaborated great significances of Kossel- Transki- Volmer theory and BCF<br />

(Burton, Cabrera and Frank) theory in his well appreciated book. This BCF<br />

theory was originally proposed for growth from the vapor phase but its<br />

applicability to solution growth has been strongly advocated by Bennema and<br />

Gilmer [31].<br />

Numerous other theories and models have been developed not only for<br />

the vapor growth but solution growth and melt growth also which are discuss<br />

in details by [2, 8, 32]. Many models are based on Monte Carlo simulations<br />

[33]. Derby [34] has given minute details of the present challenges of the<br />

crystal growth models. According to him the requirements are that one needs<br />

more realistically represent the many important interactions in crystal growth<br />

systems; models must be capable of describing detailed system geometry<br />

66

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