The temperature dependencies of the line shape parameters of some Raman-active vibrations at temperatures near to the antiferromagnetic-paramagnetic phase transition infers for a significant spin-lattice coupling in this compound. The most informative in this aspect is theB 3 g phonon at 387 cm 1,...
XRD, ATR-FTIR, and Raman Spectrum characteristics indicated that the pure alpha-FeOOH phase had been successfully synthesized. The morphology and pore structure were investigated by FE-SEM and N-2 adsorption-desorption isotherms. The Sb(V) adsorption kinetics, isotherms, and mechanism on mesoporous...
RAMANThe structural, elastic and mechanical properties of orthorhombic goethite (alpha-FeOOH) under pressure have been investigated using the plane-wave ultrasoft pseudopotential technique based on the first-principles density functional theory. The calculated equilibrium lattice parameters and elastic ...
The presence of goethite was confirmed by FTIR, Raman spectroscopy and thermogravimetric analysis. Textural analyses showed that the material is mesoporous with a BET surface area of 134 m(2) g(-1). SEM pictures revealed that the plasma-synthesized goethite particles consist of sea-urchin like ...