I am refining my first structure (Cd-SAD) with the Phenix (GUI) and would like to refine anomalous f' and f".  When i check the box, a menu appears and I have no idea of how to define the Cd atoms.

I looked at the help and FAQ and found this:

  group {
    selection = name BR
    f_prime = 0
    f_double_prime = 0
    refine = *f_prime *f_double_prime

So I thought the name should be input as CD in the gui but when I submitted the refinement I got an error.

Any help here would be appreciated? 

Thanks,

John Rose