The Formation and Relative Stabilities of CS Planes

The final instance where nucleation of a new CS plane seems to be influenced by the elastic-strain field around a CS plane occurs when we consider isolated 102 CS planes. There are a number of situations to consider. The nucleation of a new CS plane could be made easier by virtue of the elastic-strain field, made more difficult, or 

When we are considering the energy of a homologous series of oxides, the internal energy of the CS planes themselves will vary only slightly from one member to 

Suppose that a sample of composition is prepared in a sealed ampoule and 

Imagine a crystal of the oxide to contain N CS planes. The elastic-strain 

Some further consideration reveals that this analysis is also true if the sample consists of many crystals which disporportionate instead of just a single crystal. Hence, in a normal sample, the disproportionation can be made without a change in the total surface area, number of CS planes, or number of crystals. The net change in elastic-strain energy is then given by [(17s)  

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