Mossbauer studies of the ubiquitous protein molecule ferritin and its synthetic "biomimic" polysaccharide iron complex (pIC) exhibit an anomaly in the Mossbauer spectrum wherein the recoil free fraction orf-factor has a sharp drop with respect to temperature as the temperature rises above 30 K for mammalian ferritin and 60 K for PIC. The anomaly coincides with the disappearance ofhyperfme split...

FeSe2 and FeTe2 both crystallize in C-18 Marcasite type orthorhombic structure. We have attempted to substitute tellurium in FeSe2 by solid state reaction method and polycrystalline samples Fe(Se2-xTex) with x=0.2,0.6,1.0,1.4,1.8 were synthesis to study the effect of substituting Te with Se in FeSe2. Phillips X-ray diffractometer is recorded XRD patterned using CuKα radiation into 2θ range of 1...

The concepts of source and quantum action principle are used to produce the phonon Green's function appropriate for an initial phonon vacuum state. An application to the Mossbauer effect is presented.

A study of the Mossbauer effect of Fe in magnetic materials subjected to high pressures is described. Specific systems reviewed are FeF2 , ct, s and -y phases of iron, invar, stainless steel and a metallic glass.

11 Pillinger, W. L., and J. A. Stone, Mossbauer Effect in Ferredoxin, E. I. du Pont de Nemours and Company, Savannah River Laboratory, Aiken, S.C., AEC Report DP 878 (1964). 12 Figgis, B. N., and J. Lewis, in Modern Coordination Chemistry, ed. J. Lewis and R. G. Wilkins (New York: Interscience, 1960), p. 406. 13 Frauenfelder, H., The Mossbauer Effect (New York: W. A. Benjamin, Inc., 1962). 14 F...

The Mossbauer effect associated with (129)I, (125)Te, and (57)Fe has been applied to investigate structural properties of the axial ligands in ferric-high spin hematoheme-I, hematoheme-Te, and hematoheme-histidine-iodide. The magnitude and sign of the (129)I quadrupole coupling constant (e(2)qQ) and the isomer shift, as deduced from the Mossbauer effect spectra, are consistent with an axial, s-...