Maghemites

Maghemite [12134-66-6] Magic acid Magic Acid MagicAcid [33843-68-4] Magic Carpet system Magma... [Pg.584]

Mizukoshi Y, Sato K, Konno TJ, Masahashi N, Tanabe S (2008) Magnetically retrievable palladium/maghemite nanocomposite catalysts prepared by sonochemical reduction method. Chem Lett 37 922-923... [Pg.150]

Hyeon, T., Lee, S.S., Park, J., Chung, Y. and Bin Na, H. (2001) Synthesis of highly crystalline and monodisperse maghemite nanocrystallites without a size-selection process. Journal of the American Chemical Society, 123 (51), 12798-12801. [Pg.80]

Park, H., Ayala, P., Deshusses, M.A., Mulchandani, A., Choi, H. and Myung, N.V. (2008) Electrodeposition of maghemite (gamma-Fe203) nanopartides. Chemical Engineering Journal, 139 (1), 208-212. [Pg.83]

In the case of roasting, the pretreatment process destroys the sulfide matrix by driving off sulfur from the structure. This results in the formation of iron oxide particles that are made of concentrically zoned and porous hematite and maghemite (Paktunc et al. 2006). Arsenic is volatilized as As203 and oxidised to... [Pg.360]

Faust and Hoffmann (1986) and Litter and Blesa (1988) who investigated the wavelength-dependence of the rate of photochemical reductive dissolution of iron(III)(hydr)oxides using hematite-bisulfite and maghemite-EDTA as model systems, respectively. [Pg.356]

Oxide mineralogy may influence rates of reductive dissolution in several ways. Hematite (ct-Fe203) and maghemite (y-Fe203), for example, have the same stoichiometry but contain Fe(III) in quite different coordinative environments. Fe(III) in hematite occupies trigonally-distorted octahedral sites, while Fe(III) in maghemite is found in both octahedral and tetrahedral sites (42). Differences... [Pg.458]

D. Miser, E. J. Shin, M. R. Hajaligol, and F. Rasouli, HRTEM characterization of phase changes and the occurrence of maghemite during catalysis by an iron oxide, Appl. Catal. A Gen. 258(1), 7-16 (2004). [Pg.253]

Ferrihydrite Bernalite Hematite Magnetite Maghemite Wdstite... [Pg.6]

Maghemite, y-Fe203, is a red-brown, ferrimagnetic mineral isostructural with magnetite, but with cation deficient sites. It occurs in soils as a weathering product of... [Pg.7]

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