2.13.1 Limiting Conditions

Now we need to determine the limiting condition for determining the boundaries of pO₂ across which various defect concentrations can be plotted as a function of oxygen partial pressure. These three regions are regions of

• Low pO₂,

• Intermediate pO₂, and

• High pO₂

These regions depict oxygen deficit (or metal excess), stoichiometric composition and oxygen excess (or metal deficiency) respectively.  Following sections eluciate the process for determining these boundaries for a metal oxide with either of oxygen deficit, stoichiometric composition and oxygen excess for an oxide considering anti-Frenkel defects.