Hi all,
During XRD analysis what is the difference between unmatched strong, no matching lines, score values, and simply dot in score section? which one should be consider if the same phase appears in different categories.
Hi,
first of all, the scoring column is an indication of the most probable phases present in your sample, so you should check manually peaks on the ICDD cards and compare with the measured peaks. Usually, the program organizes the matched ICDD cards by an internal 'score' from the most similar to the measured sample to the least one. In particular, the indication on no matching lines indicates that one or more lines of the ICDD card are different from the measured ones, but not the strong ones. Unmatched strong means that the strong lines (the most intense ones)of the ICDD card don't match with the strong lines of the measured sample. Finally, numbers represents an indication of the internal 'score' (usually from 0 to 100) and dots are similar phases'cards with no internal 'score'.
Definetively, if you see different cards describing the same phase (i.e. martensite), you should check their quality (S is the best quality) manually (as I suggested earlier) in order to compare peaks position and d-spacing.
I hope being helpful
Luca
Hi,
first of all, the scoring column is an indication of the most probable phases present in your sample, so you should check manually peaks on the ICDD cards and compare with the measured peaks. Usually, the program organizes the matched ICDD cards by an internal 'score' from the most similar to the measured sample to the least one. In particular, the indication on no matching lines indicates that one or more lines of the ICDD card are different from the measured ones, but not the strong ones. Unmatched strong means that the strong lines (the most intense ones)of the ICDD card don't match with the strong lines of the measured sample. Finally, numbers represents an indication of the internal 'score' (usually from 0 to 100) and dots are similar phases'cards with no internal 'score'.
Definetively, if you see different cards describing the same phase (i.e. martensite), you should check their quality (S is the best quality) manually (as I suggested earlier) in order to compare peaks position and d-spacing.
I hope being helpful
Luca
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