Graphite (layers of Graphene) has only two crystal structures*, mostly AB stacking and rarely ABC stacking.
AB stacking is strongly bonded structure**, hard to exfoliate into graphene. ABC stacking is weakly bonded, easy to exfoliate into graphene. ** ref. Geometrical Optimization of Graphite Structure;
authors: Nobuo NARITA, Masahito KATO and Shugo SUZUKI;
May 28th, 2013 (Received)
The established theory in Graphite Society*** says “Graphite consists of mostly AB stacking and when milled and heated AB stacking is converted to ABC stacking but saturated up to 30%”.
*** ref. Structural Change of Graphite with Grinding;
authors: Michio INAGAKI, Hisae MUGISHIMA and Kenji HOSOKAWA;
February 1st, 1973 (Received)
GPC made Graphite consisting of ABC stacking more than 31 % and has patented.
GPC discovered ABC stacking Graphite to be 100 times efficient in produce Graphene more than from AB stacking Graphite directly.
There is no way to produce Graphene from Graphite, with industrial efficiency, bypassing crystalline disorder of ABC stacking.
In the process of pGraphene manufacturing, Graphene can be functionalized, attaching Oxygen, Nitrogen, Fluorine, Silicon and Silver, which is indispensable for enhancing effectiveness.
99% of Graphene in weight worldwide will pass through ABC stacking which brings $Bs profit.