Figure 2
From: Iron (hydr)oxide formation in Andosols under extreme climate conditions
Raman spectra obtained from former MB2 titanomagnetite phenocrysts embedded in soil aggregates. (a,b) Reflected light microphotographs of individual grains with diameters of ~ 40 to 60 μm. The inset in (a) shows the false color image of the dominant Raman spectra (representing spectra c,e) determined upon area scan of the region marked with the white square. (c,d) Mixed spectra comprising spectral information of magnetite, maghemite and hematite. (e,f) Raman spectra of hematite. Bold numbers represent wavenumbers of diagnostic Raman bands. Yellow markings indicate the localizations of the respective measurements.
