Dear All,

I am trying to calculate the bandstructure of zigzag graphene nanoribbon by creating large two dimensional supercell. So basically, the system is constructed as an array of graphene nanoribbon in which the separation distance between the ribbons is large. The input for the kpoint in my scf calculation is chosen to be kpoint automatic. Every Nosym parameter are set to be false. 

My question is why the number of kpoint that is actuallly generated by the code is more than the input?

Ex: for kpoint 12 12 1 0 0 0 -> total kpoint is 148

      for kpoint  40 10 1 0 0 0 -> total kpoint is 604

If Im correct, because of the symmetry usually the number of kpoint will be reduced, but I dont understand why in this care the number of kpoint become larger than the input?

Thank you,

Satrio