Hexagonal graphite graphene layers

Figure 5.20. Arrangements of carbon atoms in hexagons in graphene layers (basal planes) as stacked to form hexagonal graphite, ABABA.

Single planar sheet of sp -bonded carbon atoms corresponds to one hexagonal basal plane of graphite and is termed graphene. Recently, a successful attempt to isolate such a graphene layer has been reported [3], and apparently, it becomes possible to produce... 

The tetrahedral connectivity leads to space-filling carbon polymers which are realized as defect-free ideal structures in diamond. The trigonal connectivity leads to sheets of carbon which are, in the defect-free variety, made up of hexagons leading to so-called graphene layers. The structures of graphite will result if these layers arc regularly stacked in the third dimension. In... 

Table 1. Selected properties of hexagonal graphite and cubic diamond. Anisotropic data for graphite are given in directions first parallel to and then perpendicular to the graphene layers. ...

HEXAGONAL GRAPHITE is the thermodynamically stable form of GRAPHITE, with an ABAB stacking sequence of the GRAPHENE LAYERS. 

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