All symbols during the SiC structures have a specific that means: The number 3 in 3C-SiC refers back to the three-bilayer periodicity with the stacking (ABC) and also the letter C denotes the cubic symmetry on the crystal. 3C-SiC is the only real feasible cubic polytype. The wurtzite ABAB. 3C https://tysonfgfdb.blogspothub.com/34852545/colour-of-manganese-dioxide-fundamentals-explained