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Iron Oxides and Oxyhydroxides
E. Murad,J. H. Johnston +1 more
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This article is published in ChemInform.The article was published on 1989-04-25. It has received 202 citations till now.read more
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Hydrous ferric oxide precipitation in the presence of nonmetabolizing bacteria: Constraints on the mechanism of a biotic effect
TL;DR: In this paper, the authors used room temperature and cryogenic 57Fe Mossbauer spectroscopy, powder X-ray diffraction (pXRD), mineral magnetometry, and transmission electron microscopy (TEM) to study the synthetic precipitation of hydrous ferric oxides (HFOs) prepared either in the absence (abiotic, a-HFO) or presence (biotic, b- HFO) of nonmetabolizing bacterial cells (Bacillus subtilis or Bacillus licheniformis, ∼108 cells/mL) and
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The Mössbauer and magnetic properties of ferritin cores
TL;DR: The studies reviewed contribute uniquely to the elucidation of the spin-structure and spin-dynamics of anti-ferromagnetic nanolattices and their possible applications to nano/bio-technology.
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Reflectance and Mossbauer spectroscopy of ferrihydrite-montmorillonite assemblages as Mars soil analog materials.
TL;DR: Ferrihydrite-bearing smectites warrant serious consideration as a Mars soil analog given the remarkable similarity between visible-infrared reflectance spectra of soils in bright regions on Mars and Fe(3+)-doped montmorillonites.
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The Influence of Crystallinity on Magnetic Ordering in Natural Ferrihydrites
TL;DR: In this paper, the M6ssbauer spectra of three natural ferrihydrites of different crystallinities were collected between 295 and 4.2 K, and the optimal fits of the room-temperature spectra were obtained using distributions of quadrupole-split doublets.
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Magnetic properties of microcrystalline iron (III) oxides and related materials as reflected in their Mössbauer spectra
TL;DR: In this paper, a wide range of models have been proposed to account for the magnetic properties of microcrystalline iron oxides, including superparamagnetism, collective magnetic excitations, anomalous recoil-free fractions, superferromagnetic properties, spin canting and speromagnetisms, reduced hyperfine field supertransfer, and Neel temperature reductions and distributions.