Possible structural models of n-diamond: A modified form of diamond

Abstract
A few possible structural models of n‐diamond, which is a modified form of diamond quenched from shock‐compressed graphite, are proposed on the basis of observed electron diffraction patterns. From the structural relationship and transition mechanism, the most favored structure is composed of hexagonal‐ring‐planes moderately puckered with opposite direction to that of cubic (Fd3m) diamond, having a peculiar bonding state different from exact sp2 and sp3.