Abstract

Reflection x‐ray topography and scanning electron microscopy in the panchromatic cathodoluminescence mode have been used to investigate precipitate‐like defects in crystals. It has been found that they have dimensions ranging from about 10 to 50 μm and are either triangular or hexagonal shaped. Associated with the defects there are clusters of dislocations punched out in 〈110〉 directions, forming starlike patterns.

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