[Wien] questions about BZ in xcrysden

[白宇]

Dear users: 
  I'm doing caculation about anatase phase TiO2 with wien2k. I construct a four unit cell supercell with(or without) impurity, and in xcrysedn. 
I see the struct which I want. when doing the band-struct ploting I use xcrysden to choose k-path, then the primitive BZ and conventinal BZ are all 
not correct. It is just too simple. 
Can you give me some suggestions? 
Thanks. 
Best regards.