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Chapter II Solution Growth….
evaporation technique, the details of the other growth techniques are avoided
and the focus is made on solution growth techniques.
2.2 Basic Theories and Developments
Crystal growth has been long cherished for the fascinating
observations, where the atomic nature of matter clearly shows itself. It has
been realized that the subject can be divided into two parts: (1) The study of
the equilibrium between the crystal and surrounding medium and (2) The
study of the kinetics of growth.
The Kossel model [19] is helpful to understand the basic theories of
crystal growth. In figure (2.3 a) a low index face of a perfect (001) face of
(a) (b)
Figure: 2.3 (a) Step on a perfect crystalline surface, (b) Step with kinks and vacancies.
crystal at the absolute zero temperature, at which no thermal vibrations of
component molecules are available, is shown. This represents the profile of a
completely flat surface partially covered by another layer. The boundary line,
where the difference of level equals to an inter-molecular spacing between the
two sides of the line, is khown as a step on the crystal surface. If a crystal is in
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