Abstract
The internal structure of synthetic diamond crystals has been investigated using cathodoluminescence patterns. The {111} faces adsorb impurities more intensively than the {100} faces, the growth pyramids therefore differ in their constitution and properties, and the crystals have a sectorial structure. Non-uniform adsorption of impurity by different layers results in zonality of growth pyramids. With a low degree of melt-solution supersaturation with carbon the layers are nucleated on structural defects emerging on the surface of the face, and with a high degree of supersaturation they are nucleated on crystal spices and edges. Mosaic synthetic diamond crystals are formed under conditions of extremely high supersaturation.
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