Here in the following figure, the sample R120086 (chemistry FeO(OH)), source Michael Scott S102426. . Here the peaks from the Raman spectra in RRUFF, compared with the previously give data (in cm -1 ): , who aimed to characterize corrosion processes in iron-water interfaces". Then, we can find mentioned the SERS studies by Oblonsky and Devine. "In these studies, high laser power was employed (from 100 to 500 mW) and this could lead to sample degradation". With the recent Raman instruments, "it is now possible to obtain good quality spectra even from very poor light scatterers using a few hundred micro watts or even less" (De Faria et al.). The existence of disagreements in the Raman spectra of iron oxides and oxyhydroxides available from literature was the stimulus of De Faria and coworkers' research. We can find Raman spectra of hematite, magnetite, wüstite (FeO), maghemite (γ-F2O3), goethite (α-FeOOH), lepidocrocite (γ-FeOOH) and δ-FeOOH. The aim is also that of understanding the influence of laser power.