Figure 1 | MRS Communications

Figure 1

From: Q-carbon harder than diamond

Figure 1

(a) The standard unit cell of diamond consisting of 4 tetrahedra containing central atoms along the four <111> directions. Panel (b) shows the DCL tetrahedra (D1) with a central atom. These D1 subunits are contained in (a/2, a/2, a/2), one-eighth of the unit cell. Panel (c) represents the adjacent subunit cell D2 consisting of only four atoms, which is equivalent to missing central atom in the subunit cell D1.

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