I have made Fourier maps in G-Fourier program built in Fullprof Suite and based on the Rietveld refinement of powder pattern. I have Boron-rich B13C2 compound. Refinement accepts a new position partially occupied by Boron, however, Fourier maps don't show any electron density on these positions. Instead, a negative electron density only. Although, Rietveld refinement is very stable and R-value also improves with this additional boron position. Should I take this new Boron position into account or not?
Did you use the difference fourier map ?
Maybe your F000 is wrong ? Could lead to negative peaks I think.
But honestly I´ve never actively used the Fullprof Suite
Thanks. There was a little problem in the setting of G-Fourier. I have solved this problem now.
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