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Akaganeite is often described as the β phase of anhydrous ferric oxyhydroxide FeOOH, but some chloride (or fluoride) ions are normally included in the structure,, so a more accurate formula is FeO 0.3(OH) 1.167Cl 0.167.

Akaganeite xrd. ⓘ Akagane mine, Esashi ward, Oshu City, Iwate Prefecture, Japan The presence of akaganeite indicates high concentrations of chloride in an acidic environment (Ståhl et al. Akaganeite was the first phase to form and hematite was the final phase in our experiments with temperatures between 150 and 0 °C. XRD patterns of akaganeite samples heated at 260 and 300 °C, clearly indicate that the akaganeite transformed into hematite.

The presence of akaganéite is questionable because the characteristic diffraction line at 2 θ = 6° is weak while the other lines of akaganéite coincide with those of lepidocrocite and/or goethite. Thus the 3.6 nm peak could be attributed to akaganeite and goethite and the smaller diameter pores to Fe(OH) 3. Abstract Synchrotron X-ray diffraction was used to monitor the hydrothermal precipitation of akaganeite (β -FeOOH) and its transformation to hematite (Fe 2 O 3) in situ.

Beta = 90.03° V = 337.43 Den(Calc)= 3.75. These tunnels 0.5 nm in cross section contain Cl − ions that stabilize the structure. Classification of Akaganeite Hide.

The experimental peaks of the uncalcined sample were perfectly matched with the theoretical data of the JCPDS card no. For example, the ferrous corrosion products goethite, lepidocrocite, feroxyhyte and akaganeite can be distinguished from each other, even though they all have the chemical formula FeO (OH). Furthermore, XRD can readily distinguish between different crystallographic modifications of phases that have the same chemical formula.

The spelling akaganéite is incorrect (Burke, 08). XRD pattern of syn- thetic akaganeite matches well with that of β-FeOOH reference (JCPDS NO. The interpretation of the XRD spectra indicated that the small particle size Fe(III) hydroxide is always formed in different concentrations, together with akaganeite and goethite.

34-1266, thus indicating the presence of pure akaganéite (β-FeO (OH)). A = 10.587, b = 3.0311, c = 10.515, Z = 1;.

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