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Showing 1 to 20 of 45 for “"Mössbauer spectroscopy"”.
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Mössbauer spectroscopy and crystal chemistry of aenigmatites
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1983.
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Texture measurement of a beryllium-iron alloy using Mössbauer spectroscopy
Includes bibliographical references.
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129Iodine Mössbauer spectroscopy: Probing the molecular orentation in liquid crystals
Submitted by Jesse Garrison (jagarris@illinois.edu) on 2012-01-11T19:49:40Z No. of bitstreams: 1 1974_potasek.pdf: 1263890 bytes, checksum: 9c23e23be175f216c9fed3ccd3e57184 (MD5)
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Mössbauer spectroscopy of Fe-N and Fe-C solid solutions.
Thesis. 1976. Ph.D.--Massachusetts Institute of Technology. Dept. of Materials Science and Engineering.
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Mössbauer spectroscopy and crystal chemistry of natural Fe-Ti garnets.
Thesis. 1977. M.S.--Massachusetts Institute of Technology. Dept. of Earth and Planetary Sciences.
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Atomic-scale structure of the tin DX center and other related defects in aluminum gallium arsenide semiconductors using Mössbauer spectroscopy
Includes bibliographical references (pages 135-144).
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Synthesis and characterization of Fe-containing oxide powders and carbon nanotube-Fe-oxide nanocomposites
… investigation of all the materials by 57Fe Mössbauer spectroscopy and to correlate the results with those obtained by other techniques with the aim to obtain information on the formation of the CNTs, thermal stability, and surface composition of the CNT-nanocomposite powders. The techniques …
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Understanding the factors which Influence the interactions of iron (II) and iron (III) in porphyrins and the chemistry of silicon phthalocyanine
… and iron(III) porphyrins using high-pressure Mössbauer spectroscopy. Further work was aimed at the formation of a new complex between iron(III) tetraphenylporphyrin chloride [Fe(III)TPPCl] and silicon phthalocyanine di-4pyridinecarboxylic acid [Si-Pc(4PyCOO)2]. The synthesis of …
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The magnetic and electronic structures of several rare earth-transition metal intermetallic compounds
… by x-ray and neutron diffraction, SQUID and Mössbauer spectroscopy (LaNi<sub>5-x</sub>Fe<sub>x</sub> only). All of the samples crystallized in the hexagonal CaCu<sub>5</sub>-type structure with space group P6/mmm. Both Fe and Mn atoms preferentially occupy the 3g site in these compounds. The …
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Mössbauer investigations of high-spin ferrous heme proteins
"Mössbauer spectroscopy of heme proteins containing iron in the high-spin ferrous state is discussed. Paramagnetic hyperfine interactions, induced by strong applied magnetic fields, result in Mössbauer spectra that contain a wealth of information about the symmetry of the active site iron atomo …
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Mantle conditions and kimberlite geochemical criteria controlling diamond survival in Kimberlites
… probe microanalysis (EMPA), XRF, XRD and 57Fe Mössbauer spectroscopy. The results of petrography and geochemical studies of peridotite, eclogite and kimberlite rocks during this project have revealed that the sampled kimberlite diamond deposits have experienced several alteration processes and …
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Fundamental magnetic properties of Greigite (Fe3S4)
… by X-ray diffraction, neutron diffraction, Mössbauer spectroscopy and elemental analyses. Based on this suite of highly pure synthetic greigite samples, as well as a range of natural greigite samples collected from widely distributed localities, extensive analyses have documented some of the …
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Iron spin crossovers at high pressures and temperatures and their effects on materials relevant tot he Earth’s lower mantle and core
… temperature conditions of the Earth’s interior, Mössbauer spectroscopy, which is a sensitive probe for detecting structural and spin changes in Fe-bearing materials, and analytical transmission electron microscopy, as a probe of chemistry and oxidation state on the nm-scale. In this cumulative …
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Chemical and physical characterization of clay bodies
… mix of both clay and non-clay minerals. 57Fe Mössbauer spectroscopy has highlighted the presence of both small and large particleα-Fe203, removable via acid washing. 19F MAS NMR has demonstrated that the raw Whichford Pottery clays examined have negligible fluorine content. This is unlikely to …
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Site-selective Labeling of the Nitrogenase Iron-Molybdenum Cofactor
… states using advanced EPR techniques or magnetic Mössbauer spectroscopy.
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On the synthesis, characterization, and magnetization of Ln-M-X (Ln = lanthanide; M = Ti-Cr, Cu, Mo, Pd; X = Al, Ga) intermetallics
… the stability of the CeCr2Al20 structure-type. Mössbauer spectroscopy results for YbCr2FexAl20-x indicate that Fe atoms occupy two crystallographic sites, and X ray diffraction refinements suggest that the Fe atoms occupy the Al1 and Al2 sites rather than the Cr site. These results are …
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Iron oxidation in (Mg,Fe)0: Calibration of the Flank method on synthetic samples and applications on natural inclusions from lower mantle diamonds
… a more accurate procedure for fitting the Mössbauer spectra of the final set of synthetic (Mg,Fe)O was adopted. The calibration curve determined is Fe2+ = 46.238 + 8.161 * ln (Fetot) - 137.01 * (Lbeta/Lalpha) + 85.57 * (Lbeta/Lalpha)2, for a Fe compositional range between 3 and 47 wt. %. A …
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Iron in oxides, silicates and alloys under extreme pressure-temperature conditions
… a combined single crystal x-ray diffraction and Mössbauer spectroscopy at pressures below 25 GPa. We find no evidence for the transition from inverse to normal spinel in magnetite. Analyzing the collected Mössbauer data, we show that a high spin – intermediate spin transition cannot occur in …
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Comparative study of rare- earth based ferrites for flammable and volatile organic compound gas sensors
… electron microscopy, X-ray photoelectron spectroscopy, Mössbauer spectroscopy and gas sensing analyses. The X-ray diffraction results indicated that a pure cubic spinel phase was formed for samples having a low concentration of Ce, but the high Ce doping (x ≥ 0.2) of magnesium ferrite …
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