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Calibrated NRVS of Fe (red) and [FeCl4]− (orange) versus their copies with 99.9% (a) and 99.7% (b) scaled energy axis (blue and green). There is no observable difference between the original and scaled NRVS in (a), while there is a clear difference between the two spectra in (b). (c) and (d) are the expanded versions of (a) and (b), respectively.
