The system energy change occurs in favor of the solid structural changes such electronic

If the energy change in favor of this occurs in the solid changes in the electronic structure, the high temperature phase transition occurs in the solid state, or may occur in the molten state or vapor state. This change occurred in the melt condition that the bonding characteristics of the distribution of the valence  polycrystalline diamond  statistical weight reduction effect tends to disappear remote orderly, coordination number is changed; the electronic excited state statistical weight chemotaxis to increase the role of short-range order corresponding enhancement. This change occurred in the gas condition that elemental interatomic or  abrasive grinding  bonding of the compound of the electron energy levels tend to disappear, all electronic transfers to a single atom or molecule level up, so that the electrons in the excited state is more statistical weight is increased. Accordingly, synthetic diamond can be solid, but also may be in the melt state and the vapor state conditions, depending on the pressure, temperature and component concentration and other factors can cause changes in the system. From the kinetic point of view, but also requires a carbonaceous material such as graphite into diamond with an appropriate transition rate.