FORMATION OF A FILM-SUBSTRATE INTERFACE IN THE SILICON-DIAMOND SYSTEM L. O. Meleshko UDC 536.425 The paper presents results of research on the forces of interaction of a pair of isolated carbon atoms and of a carbon atom in the gas phase with diamond and silicon substrates in relation to the distance between them. Based on the results obtained, the conclusion is drawn that the transition of atoms to an ordered array in formation of a single-crystal film is caused by the forces of interaction between atoms of the precipitate whose electronic structure can change with a change in the energy of interaction. JEPTER7492019998 JEPTER749208