@article{cheng_bereman_de grave_bowen_2001, title={A study of aluminum-substituted iron dextran complexes by Mossbauer spectroscopy and X-ray diffraction}, volume={13}, ISSN={["0897-4756"]}, DOI={10.1021/cm000489v}, abstractNote={Two aluminum-substituted iron dextran complexes and one nonsubstituted have been synthesized and characterized by Mossbauer spectroscopy over a wide temperature range (10−298 K) and by X-ray powder diffraction at room temperature. The mean coherence lengths in the directions perpendicular to (211) and (200) are different, indicating that the core iron oxide materials are oblong in shape. The X-ray diffraction patterns of all complexes are very similar, with broad, weak peaks at 5.0, 3.3, 2.5, 2.25, 1.6, and 1.8 A. These values are consistent with cell-contracted akaganeite, β-FeOOH. The three samples exhibit different temperatures for the onset of magnetic splitting in their Mossbauer spectra. The Mossbauer spectra obtained at room temperature can be adequately fitted with a model-independent distribution of quadrupole doublets, while at low temperatures a superposition of distributions of sextets and doublets is required. The obtained Mossbauer parameters are in line with the structural features. This is...}, number={1}, journal={CHEMISTRY OF MATERIALS}, author={Cheng, TR and Bereman, R and De Grave, E and Bowen, LH}, year={2001}, month={Jan}, pages={136–140} }