The crystallochemical characterization of magnetic spinels prepared from aqueous solution has been studied primarily by electron microscopy and 5 Fe Mossbauer spectroscopy. . Two synthetic routes investigated : 7Fe have been t : method 1; partial oxidation of Fell solutions " in the presence of NO;; at 100°C, O C , and method 2; reaction of hydrated Fe oxide (ferrihydrite) with Fell ions at roo...

BACKGROUND Iron oxide nanoparticles have numerous and versatile biological properties, ranging from direct and immediate biochemical effects to prolonged influences on tissues. Most applications have strict requirements with respect to the chemical and physical properties of such agents. Therefore, developing rational design methods of synthesis of iron oxide nanoparticles remains of vital impo...

Whiskers of iron carbide encased in carbon shells have been prepared from iron(I1) phthalocyanine. Solid FePc is oxygenated and then thermally treated under H2 flow. With proper control of conditions, Fe3C free from metallic iron can be synthesized. The product was characterized with the help of Mossbauer effect spectroscopy, X-ray diffraction, X-ray absorption, and transmission electron micros...

The transition-metal perovskites SrFel.,Cox03 (0 i x 51) are of a great interest because the high oxidation states of the transition-metal (Fe(IV), Co(N)) can be stabilized. Moreover these compounds exhibit interesting magnetic properties. These oxygen stoichiometric phases have been prepared only under high oxygen pressures. A novel preparation method of these phases has been investigated usin...

— A new neptunium fluorozirconate glass (NpBasZrnF*) has been prepared and its Mossbauer spectrum was measured at 4.2 K and 77 K. Two resonance lines were observed. One is assigned to the Np ions occupying the normal Np sites in the compound. The other is thought to arise from Np which has replaced some of the Ba ions. The isomer shift of those ions suggests a configuration near 5f 6d . The Np ...

The effect of surface functionalization with citric acid on the properties magnetic nanoparticles (MNPs) Zn x Fe 3-x O 4 (x=0; 0.25; 0.5; 0.75; 1.0) synthesized by hydrothermal method was studied. To study MNPs, X-ray diffractometry (XRD) and energy dispersive spectroscopy (EDS) were used. samples phase state MNPs studied using a physical property measurement system (PPMS) Mossbauer (MS). It ha...

(B) Multi-elemental analysis by X-ray fluorescence. (use in Art, Archeology and environmental science)(1 week). The advent of inexpensive high-resolution X-ray spectrometers based on thermoelectrically cooled Si-PIN diodes has opened the possibility of many innovative experiments in analytical chemistry with many applications in art and archeology, environmental monitoring, nuclear medicine, to...