Complete Diagram Ionic Defects

It is important that the complete diagram displays prominently information about the assumptions made. Thus, the assumption that Schottky defect formation was preferred to the formation of electronic defects is explicitly stated in the form Ks Ke (Fig. 7.9e). As Frenkel defect formation has been ignored altogether, it is also possible to write Ks Ke Kt , where A p represents the equilibrium constant for the formation of Frenkel defects in MX. 

This central, medium pressure, region of the diagram displays the electroneutrality equation approximation [V J = [Vj J at the top. In this region the compound 

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