The silicon carbide illustrated here is hexagonal, with a space group P63 and lattice parameters a=0.3078 and c=1.0046 nm. There are carbon atoms at (0,0,0.188) and (2/3,1/3,0.439) and silicon atoms at (0,0,0) and (2/3, 1/3, 0.2508).
There are many polytypes of this variant of silicon carbide, meaning that the lattice parameter `c' can vary as 0.2508n, where n represents the number of layers in a repeating period.
Silicon carbide is a hard abrasive and is often used for polishing steels. It can be semiconducting. High temperature electronics can be made from silicon carbide.http://www.msm.cam.ac.uk/ph...