Interstitial Agglomerates in Si

Shown are small stacking fault loops, i.e. small platelets of Si-atoms wedged in between two (111) lattice planes. This then might be considered to be a two-dimensional agglomerate of Si self-interstitials.
In the picture on the lower right the (111) plane is in the paper plane, in the other cases it is inclined; in the lower left case the (hexagonal) loop is truncated by the specimen surfaces.
For more details about electron microscopy refer to chapter 6.3.3

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go to 4.2.1 Point Defects in Non-Equilibrium

© H. Föll (Defects - Script)