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Figure 2
The observed (circles), calculated (line) and difference (bottom) profiles for (a) a good fit of a peak, (b) a calculated intensity that is too high and (c) a calculated intensity that is too low. The characteristic difference profile for an intensity is either positive or negative and concentrated at the centre of the peak.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 32| Part 1| February 1999| Pages 36-50
doi:10.1107/S0021889898009856
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