Mössbauer Spectroscopy of Environmental Materials and Their Industrial Utilization

Magnetism and phase transformation of Cu-Fe composite oxides prepared by the sol-gel route

“…2, with the hyperfine interaction parameters summarized in Table 2. As known, the IS value is the most important factor for diagnosing the chemical states of iron [7]. In the case of CuFe-400 sample, the Mössbauer spectra of IS = 0.33 mm·s −1 and QS = 0.86 mm·s −1 are in agreement with these value of α-Fe 2 O 3 in the form of doublet, as reported in Ref.…”

Surfactant effects on the microstructures of Fe3O4 nanoparticles synthesized by microemulsion method

“…The structure of magnetite is an inverse spinel which belongs to cubic crystal system. As known, its formula can be written in the general form as Fe 3+ [Fe 2+ Fe 3+ ]O 4 with Fe cations without brackets on tetrahedral (A) sites and those in brackets on octahedral (B) sites of the reverse spinel lattice [35,37]. Magnetite can have a range of oxidation states dependent upon the amount of structural Fe 2+ , which can be discussed quantitatively as the magnetite stoichiometry (x = Fe 2+ /Fe 3+ ).…”

Identification of iron-bearing minerals in basalts and pillow lavas of the Kaczawa Mountains using 57Fe Mössbauer spectroscopy

“…A Zeeman sextet with magnetic fi eld (B) of 38 T, was observed for WG, MOM and CZS samples. Based on the hyperfi ne parameters (Table 1), the magnetic phase can be unambiguously assigned to goethite -FeO(OH) [7]. Goethite is a common iron hydroxide in materials formed in the weathering environment.…”