Carbon modification with a facecentered cubic lattice (hereinafter fcc carbon) was experimentally discovered in carbon films obtained by ioninduced condensation of carbon after annealing at the temper� ature E = 350° C (1). This unusual carbon form with a lattice constant close to that of diamond was found later by H. Hirai and K. Kondo (2) upon impact load� ing of graphite and called by them ndiamond (new diamond). Subsequently, alternative methods of obtaining fcccarbon thin films (CVD, hydrogen plasma treatment of diamond, etc.) were intensively developed and discussed (3). Of special interest was the assumption that this new, fourth, allotropic carbon phase is based on nonhybridized quantum states of external electrons, in contrast to wellknown dia� mond, graphite, and carbyne with sp3, sp2, and sp1 hybridization of electron states, respectively. This exotic form of carbon was found later in the remnant of a comet that had fallen in North America 13000 years ago (4) and in crude oil of the Gulf of Mexico (5). These and other data indicate that fcc carbon is not purely an artificial product and clarification of its for� mation would elucidate the conditions of important natural processes. Academician E. M. Galimov showed the possibility of the cavitation synthesis of diamonds, including that occurring under natural conditions, as early as in 1973 (6); however, experimental and theoretical studies of cavitation synthesis of carbon structures were begun at