DISSOLUTION FIGURES ON CRYSTALS OF DIAMOND MONOCRYSTALS OBTAINED IN THE AREA OF THERMODYNAMIC STABILITY.
Abstract
Etching of crystals makes it possible to understand the stages of crystal growth and its behavior under various types of external influences, and makes it possible to find answers to questions related to their use and the peculiarities of the use of devices and products made from them. Diamond single crystals of three types Ib, IIa and IIb, obtained at high pressures and temperatures by the temperature gradient method, and diamond single crystals of type Ib, obtained by spontaneous crystallization of graphite, were studied. UV fluorescence was used to observe the presence of impurities in diamond. X-ray topography in order to assess the quality of the crystals. The density of etch pits was determined using selective etching. The nature of the development of various etch pits is very wide, the dissolution sculptures indicate a different degree of perfection of the internal structure of crystals from the most defective crystals of type Ib to more perfect crystals of types IIb and IIa.
