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A highly ordered Ge-incorporated akaganeite with the atomic ratio of Ge/Fe ¼ 0.14 and Cl/Fe ¼ 0.11 was firstly synthesized through hydrolysis and acidification of a mixed solution of FeCl 3 $6H 2 O and TEOGe (Ge(OC 2 H 5 ) 4 ) under the a-Fe 2 O 3 synthesis conditions. The newly synthesized Ge-akaganeite shows a monodisperse nanorod with 15-17 nm in width and $200 nm in length, the distinctly enhanced structural ordering and stability, and substantial differences in crystallographic and magnetic features.Here we propose a hypothetical akaganeite model with Ge occupying the tunnel sites as Ge(OH) 4 0 based on crystallographic and chemical analyses.

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