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Putative greigite magnetofossils from the Pliocene epoch
Nature Geoscience, 2008Greigite crystals of bacterial origin are widespread in modern sedimentary environments, but their occurrence in the fossil record remains controversial. Grains from Romanian Pliocene-aged sediments have now been identified as bacterial in origin, tentatively placing them among the oldest known greigite magnetofossils.
Vasiliev, I. +5 more
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Transformation of mackinawite to greigite by trichloroethylene and tetrachloroethylene
Environmental Science: Processes & Impacts, 2016Trichloroethylene and tetrachloroethylene transform mackinawite to greigite.
Ying, Lan +2 more
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Magnetic properties of sedimentary greigite (Fe3S4)
Earth and Planetary Science Letters, 1995New data are presented here that document the previously poorly known magnetic characteristics of sedimentary greigite (Fe3S4). Several diagnostic magnetic properties can be used in conjunction to rapidly screen sediments to detect the presence of greigite.
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Greigite as a Corrosion Product of Steel
British Corrosion Journal, 1972AbstractIron sulphide of composition Fe3S4, with a spinel structure, was formed by the electrochemical corrosion of steel. The presence of this specific sulphide in a given corrosion product makes it possible to infer that the corrosion in question had probably taken place under hydrothermal, galvanic conditions similar to those described in the ...
S. Yamaguchi, T. Moori
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Investigation of Hydrothermally Synthesized Greigite Magnetic Properties
Solid State Phenomena, 2015Greigite (Fe3S4) is an iron sulfide with inverse spinel structure, same as the structure of magnetite. Half-metallic properties in combination with ferrimagnetic nature of greigite puts this mineral in a fairly narrow group of materials that are potentially suitable for spintronics [1].
Maxim Krivenkov +2 more
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Greigite magnetosome membrane ultrastructure in ‘Candidatus Magnetoglobus multicellularis’
International Microbiology, 2008The ultrastructure of the greigite magnetosome membrane in the multicellular magnetotactic bacteria 'Candidatus Magnetoglobus multicellularis' was studied. Each cell contains 80 membrane-enclosed iron-sulfide magnetosomes. Cytochemistry methods showed that the magnetosomes are enveloped by a structure whose staining pattern and dimensions are similar ...
Abreu, Fernanda, Silva, Karen
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Sedimentary greigite formation and stability
Since the classic work of R.A. Berner, greigite (Fe3S4) has been considered a metastable iron sulfide that forms as a precursor to pyrite (FeS2). However, revised thermodynamic data now indicate that greigite is a stable sedimentary Fe-S phase. Equilibrium computations with the revised data explain key aspects of sedimentary greigite occurrences ...Andrew Roberts +2 more
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Iron sites in greigite from the “Cypris series”
Hyperfine Interactions, 1994Results of the57Fe Mossbauer spectroscopy of greigite from the “greigite-rich” horizon of the middle part of the miocene series (Sokolov Basin, North Bohemia) are reported. From the room-temperature transmission spectra of the powdered samples magnetically separated from claystones, the Mossbauer analyses were performed.
T. Zemčík, A. Cimbálníková
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Morphology and imperfection of hydrothermally synthesized greigite (Fe3S4)
Journal of Crystal Growth, 1974Abstract The morphology and lattice imperfection of greigite crystals have been studied in connection with pH of the solution by means of electron microscopy. (1) Crystals, synthesized at pH 9 at 180 °C, are usually of rhombic plate form with a surface plane (100). Some regions in a platelet show a different contrast, extending along the {111} planes
Shigeo Horiuchi +2 more
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Fabrication, characterization, and application of greigite nanoparticles for cancer hyperthermia
Journal of Colloid and Interface Science, 2011Greigite is a Fe-S-containing complex having magnetic properties mainly synthesized in the solution. In the present study, greigite was synthesized by a coprecipitation method at different pH's and reaction times. The greigite phase was analyzed by the X-ray diffraction (XRD) method at an optimum pH of 3.0 and reaction time of 10 min, respectively. The
Yo-Sheng, Chang +4 more
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