Figure 1: Different forms of C3N4.
From: Anomalous piezoelectricity in two-dimensional graphene nitride nanosheets
Blue and grey spheres represent nitrogen and carbon atoms, respectively. (a) Single-sheet tri-s-triazine (g-C3N4). (b) Layered tri-s-triazine sheets. (c,d) β form shown from two perspectives to illustrate the three-dimensionality of the structure.
