Building 6H-SiC, does this look right?

[Richie9384]

I'm having some difficulty understanding how to assemble a particular polytype of SiC and I think I may have made a mistake...my solid state knowledge is limited.

Basically I start with a hexagonal unit cell for SiC (Moisssanite; four atoms), I attached an image of this unit...I then extended it to build what I think is the unit cell of 6H-SiC (12 atoms)...then I extended the unit cell 5X5X1 (ABC) 6H-SiC so I can run tests on the (0001) and (000-1) surfaces.

Moissanite Hexagonal SiC

6H-SiC Unit Cell

Rotated View of the 5X5X1 Structure

Another view in the yz-plane

 

[Dr Transport]

isn't 6H-SiC just hexagonal closed packed? It has been a long time since I looked at the polytypes of SiC

 

[Richie9384]

isn't 6H-SiC just hexagonal closed packed? It has been a long time since I looked at the polytypes of SiC

Yes, I'm just trying to verify if I'm assembling this correctly. I'm having a hard time understanding some of the solid state jargon and concepts about crystals and lattices.

The 6H-SiC unit cell is shown in this diagram.