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. 2014 Aug 4;4:5930. doi: 10.1038/srep05930

Figure 1. Transformation of hexagonal graphite with 0.240 nm interlayer distance into momocrystal cubic diamond.

Figure 1

In the figure, the green and red balls represent atoms that have three and four nearest neighbors, respectively. (a). The initial state of hexagonal graphite with 0.240 nm interlayer distance. (b). The wave-like buckling of the graphite layers leads to the stacking order of the graphite layers transforming from “ABAB” to “AAAA”. (c). When the inclination angle reaches 30°, the stacking order of the graphite transforming from “AAAA” to “ABCA” (rhombohedral graphite), and the interlayer distance (d) can be calculated as 0.208 nm. (d). Parts of graphite convert into cubic diamond. (e). Graphite completely transforms into single-crystal cubic diamond. (f). The stress-strain curves in the compression process.