Goethite infrared bands

Tab. 7.2 Infrared bands of goethite (Cambier, 1986) and lepidocrocite (Lewis. Farmer, 1986) (with permission)...

DG Lumsdon, AR Eraser, ID Russell, NT Livesey. New infrared band assignments for the arsenate ion adsorbed on synthetic goethite ( -FeOOH). J Soil Sci 35 381-386, 1984. 

The absorption bands of goethite arise, as do those of the other FeOOH polymorphs, from Fe-OH and Fe-O vibrations. There are 36 possible Fe-O vibrations and 12 hydroxyl vibrations. Of these, 12 Fe-O and 5 hydroxyl vibrations (all B type) are infrared active, although not all of these are observed experimentally (Table 7.2). The same bands are detected whether the sample is examined by transmission, diffuse reflec-... 

Figure 10.2 Absorption spectra of Fe(III) oxides in the ultraviolet-visible region (left) and visible-near-infrared region (right) (from Sherman Waite, 1985). (a) Goethite (b) lepidocrocite (c) maghemite and (d) hematite. Measured reflectance spectra were converted into absorption spectra by applications of the Kebulka-Munk function. The vertical bars indicate band positions (listed in table 10.2).

Table 4.2. Infrared absorption band centers for goethite, phosphated goethites, phosphate minerals, and aqueous phosphate anions ... 

Yamaguchi Y, Frisch M, Gaw J, Schaefer HF III, Binkley JS (1986) Analytic evaluation and basis set dependence of intensities of infrared spectra. J Chem Phys 84 2262-2278 Yokoyama I, Miwa Y, Machida K (1992) Simulation of vibrational spectra of acetic acid by an extended molecular mechanics method and half band width parameters. Bull Chem Soc Japan 65 746-760 Yost EC, Tejedor-Tejedor MI, Anderson MA (1990) In situ CIR-FTIR characterization of sahcylate complexes at the goethite/aqueous solution interface. Env Sci Tech 24 822-828... 

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