Abstruct Graphite powder subjected high velocity impact, under high pressure and temperature can be changed from graphite to diamond according to solid phase structure, The cubic face-centred lattice of diamond is constituted of 18 carbon atoms, among which, there are 14 atoms which is formed 16 covelant bond pairs, so correspondingly, in four net plane layers of the ABCA type graphite, also have 16 proper atoms corresponding to each other。 This paper has founded the model to illustrate that

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... 14 carbon atoms of diamond and graphite are how to correspondence, then may be to obtain the maximal shifting distance of atom in 16 covalent bond pairs x * and activated energy U, at last,may be to calculate the transformation rate under the pressure p and temperature T; it takes key effect to design explosive parameters