Singular, Vicinal, and General Interfaces

Examples of vicinal crystal/crystal interfaces are shown in Figs. B.4c, B.5, and B.6. The vicinal interface therefore consists of the singular interface containing a 

3 Although no vapor phase is present in the figure, the surface is interpreted as being in equilibrium with its vapor phase. For many materials, the equilibrium vapor pressure is very small— nevertheless, the differences of surface structure in a vacuum environment compared to the structure in low vapor pressures can be significant. 

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