Dear All,
   
  In my structures, I want to assign Mn or Ca ions for some densities. But when 
I did not have  anomalous density in CCP4i. I am not sure whether I was 
correct. The following was what I did:
   
  I processed the data with HKL2000 and select anomalous signal in scaling. In 
CCP4i, I selected "Run FFT-Creat Map" in the "Map& Mask Utilities". I select "O 
format to cover asymmetric unit" and "Plot section on Z axis from 0 to 1 in 
steps on 10". All others were by default values. I display in ono10.
   
  I collected the data at the wavelength of 1 A. Do I need to adjust the 
wavelength to maximize the anomalous signal from Mn or Ca?
   
  Any ideas and suggestions are greatly appreciated!
   
  Sun Tang

       
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