Soret-excited rR spectra of ferric Cld at pH 4.4, 5.8, 6.8, 7.5, 8.5, and 10.0. Spectra were excited with 14 mW of 406.7 nm emission from a Kr+ laser. Raman frequencies and corresponding vibrational modes are labeled. The asterisk marks a mercury emission line from indirect exposure of the spectrometer to overhead fluorescent lighting.