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Showing 1 to 20 of 47 for “"Mossbauer spectroscopy"”.
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Quantitative determination of pyrite by Mossbauer spectroscopy
Includes bibliographical references (pages 55-56).
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[57]Fe Mossbauer spectroscopy and complementary analysis of tin coated steel.
[57]Fe Conversion Electron Mossbauer Spectroscopy (CEMS) has been used to identify intermetallic products in commercially and laboratory produced tinplated steels. By removing the tin overlayers using a potassium iodate / sodium hydroxide solution any intermetallics from the uppermost surface layer …
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Organo-iron compounds on clays and pillared clays.
… montmorillonite Westone-L. Variable temperature Mossbauer spectroscopy indicated that the molecule had a similar Debye temperature in each environment (144 +/- 5 K and 140 +/- 5 K respectively). The intercalated Mossbauer spectra revealed a Karayagin effect above 80 K. The cation occupies 80 % of …
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ΓΕΩΜΑΓΝΗΤΙΚΕΣ ΜΕΛΕΤΕΣ ΣΕ ΛΙΜΝΑΙΑ ΙΖΗΜΑΤΑ
… DIFFRACTOMETRY, THERMOMAGNETIC EXPERIMENTS, MOSSBAUER SPECTROSCOPY AND OPTICAL MICROSCOPY) SHOWED THE PRESENCE OF ANGULAR FRESH MAGNETITE OR PARTIALLY OXIDIZED TOWARDS HAEMATITE, WITH SIZE RANGING FROM LESS THAN 1 MM UP TO FEW MICRONS. THE NATURAL REMANENCE, IS OF STABLE CHARACTER PRODUCING …
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ΔΟΜΙΚΟΙ ΜΕΤΑΣΧΗΜΑΤΙΣΜΟΙ ΚΑΤΑ ΤΗΝ ΑΝΟΠΤΗΣΗ ΑΝΟΞΕΙΔΩΤΩΝ ΦΕΡΡΙΤΙΚΩΝ ΧΑΛΥΒΩΝ ΚΑΙ Η ΕΠΙΔΡΑΣΗ ΤΟΥΣ ΣΤΗ ΣΥΜΠΕΡΙΦΟΡΑ ΚΑΤΑ ΤΗ ΘΡΑΥΣΗ ΚΑΙ ΚΑΤΑ ΤΗΝ ΟΞΕΙΔΩΣΗ ΥΨΗΛΗΣ ΘΕΡΜΟΚΡΑΣΙΑΣ
… DIFFRACTIONAND FLUORESCENCE, IMAGE ANALYSIS AND MOSSBAUER SPECTROSCOPY. THE CARBIDE TRANSFORMATION M7-C3-->M23C6 IN DENDRITIC BOUNDARIES REDUCED THE ABSORBED ENERGY IN CHARPY-V IMPACT TEST. THE ZR AND TI ADDITIONS FAVOURED THE INCREASE OF THE BRITTLENESS OF THE ALLOYS, WHILE NI ADDITION HAD THE …
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ΜΕΛΕΤΗ ΣΥΠΛΟΚΩΝ ΜΕΤΑΛΛΙΚΩΝ ΙΟΝΤΩΝ ΜΕ 5' - ΑΔΕΝΟΣΙΝΟΜΟΝΟΦΩΣΦΟΡΙΚΟ ΟΞΥ, 6-ΜΕΡΚΑΠΤΟΠΟΥΡΙΝΗ ΚΑΙ ΤΟ ΡΙΒΟΣΙΔΙΟ ΤΗΣ ΚΑΙ 8-ΑΖΑΠΟΥΡΙΝΕΣ
… THESE COMPLEXES HAVE BEEN STUDIED WITH INTRACED SPECTROSCOPY, DIFFUSE REFLECTANCE, FLUORESCENCE, NUCLEAR MAGNETIC RESONANCE AND MOSSBAUER SPECTROSCOPY, MAGNETIC SUSCEPTIBILITY AND CONDUCTIVITY MEASUREMENTS, IN ORDER TO FIND THE POSITION OF THE LIGAND TO WHICH THE METAL IS ATTACHED.
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Phase formation and structural transformation of strontium ferrite SrFeOx
… methods,scanning electron microscopy and Mossbauer spectroscopy. Changes in the oxide were induced using conventional thermal treatment in various atmospheres as well as mechanical energy (ball milling). ¶ ...
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Phase formation and structural transformation of strontium ferrite SrFeOx
… methods,scanning electron microscopy and Mossbauer spectroscopy. Changes in the oxide were induced using conventional thermal treatment in various atmospheres as well as mechanical energy (ball milling). ¶ ...
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ΚΑΤΑΛΥΤΙΚΕΣ ΙΔΙΟΤΗΤΕΣ ΧΗΜΙΚΩΝ ΟΞΕΙΔΙΩΝ ΤΟΥ ΣΙΔΗΡΟΥ ΚΑΘΑΡΩΝ ΚΑΙ ΜΙΚΤΩΝ ΣΤΗ ΜΕΤΑΤΡΟΠΗ ΤΟΥ ΜΟΝΟΞΕΙΔΙΟΥ ΤΟΥ ΑΝΘΡΑΚΑ ΤΟΥ ΥΔΡΑΕΡΙΟΥ
… WHEN NEEDED, REDUCTION X-RAY DIFFRACTION AND MOSSBAUER SPECTROSCOPY CONFIRMED THEFORMATION OF SPINEL FERRITES. THE ACTIVITIES OF THE PREPARED AND TWO INDUSTRIAL CATALYSTS WERE MEASURED IN AN ALL-GLASS FLOW-TYPE REACTOR WITH A SPACE VELOCITY OF 2.800 L/(L.H) AND REACTING GAS COMPOSITION …
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Glutamine Phosphoribosyl Pyrophosphate Amidotransferase From Bacillus Subtilis: Iron-Sulfur Biochemistry and Enzymology
… EPR silent. Examination of the reduced enzyme by Mossbauer spectroscopy indicated the presence of multiple unpaired electrons (S (GREATERTHEQ) 3/2). The E(,m) of the +1/+2 couple was determined to be (LESSTHEQ) -620 mV. The reduced enzyme was found to be active in the following assays: glutamine …
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The Effect of Milling Time on the Structure and the Properties of Mechanically Alloyed High Carbon Iron-Carbon Alloys
… diffraction, differential scanning calorimetry, Mossbauer spectroscopy, scanning and transmission electron microscopes. Density and micro-hardness were measured. The milled powders and sintered samples were studied as follows: In the milled powders, the formation of Fe_3 C was observed through …
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Distal hydrogen-bonding effects and cofacial bimetallic salen architectures for oxygen activation chemistry
… cobalt, copper, and zinc were generated. Mossbauer spectroscopy was used in the characterization of the iron salen complexes, which were also examined for photolytic oxidation chemistry.
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A iron-57 Moessbauer study on the thermal oxidation of iron in biotite mica.
… therefore conveniently followed by $\sp{57}$Fe Mossbauer spectroscopy, which resolves the 2+ and 3+ valence states of iron. The main features of the annealing time and temperature dependencies of the $\rm Fe\sp{3+}/Fe\sp{2+}$ amounts are understood in terms of a simple model in which: (i) the …
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Synthesis and characterisation of metal oxides and fluorinated perovskite-related oxides
… of cobalt. X-ray powder diffraction and Mossbauer spectroscopy show that in iron-rich systems the limited reduction of iron and cobalt leads to the segregation of discrete metallic phases without destruction of the perovskite structure. In cobalt-rich systems, the reduction of …
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The preparation and characterization of stannous fluoride materials containing strontium
… fluoride ion electrode analysis, infrared spectroscopy, X-ray diffraction, thermal analyses and Mossbauer spectroscopy. Recrystallization of SrSn$\sb2$F$\sb{6\cdot}$H$\sb2$O and Sr$\sb2$Sn$\sb2$NO$\sb3$F$\sb{7\cdot}$2H$\sb2$O from nitric acid was performed in primarily an effort to obtain …
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Curiosities of the Electron Dynamics of Spin-Crossover Solids (Moessbauer)
… (4.2-313 K) magnetic susceptibility, EPR spectroscopy, and ('57)Fe Mossbauer spectroscopy. For the unperturbed complex "FeP" the low-spin (LS) (DBLHARR) high-spin (HS) spin state interconversion occurs rapidly at all temperatures, as compared to the lifetime of the ('57)Fe nuclear excited …
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A Study of the Chemistry of some Transition Metal Ions in Ceramic Glazes
… room temperature and liquid nitrogen temperature Mossbauer and magnetochemistry results for a number of Iron (III) dipyridyl complexes in order to evaluate the use of Mossbauer spectroscopy in the investigation of iron in weak ligand fields similar to those encountered in a glaze environment. …
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Vibrational and thermodynamic properties of ferrocene
… (TBBA) have been studied using Mossbauer spectroscopy. The recoil free fraction (rff) of the S7Fe resonance of crystalline Fc and deuterated Fc has been measured from 4 to 300K. Anharmonic effects are found to be important in crystalline Fe, and a model is presented to account …
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The chemistry of some heteroaryltin compounds.
… analogues are found to be more stable. [119m]Sn Mossbauer, [119]Sn nmr and mass spectrometry studies have been carried out and the results of these studies are discussed. Chemical characterisation has also been employed and results provided for derivatives of greater stability which can be more …
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A Mossbauer study of some industrial applications of organotin compounds.
The technique of high dilution Mossbauer spectroscopy using the isotope Sn has been employed to study the nuclear environment of several organotin compounds having important industrial applications. For each compound studied structural and co-ordination information has been obtained relating to the …
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