the epr spectra, typical of mutual magnetic interaction of aggregated fe3+ ions, showed a signal linewidth increase at g ca. 2 upon cooling. this phenomenon can be caused by changing the crystal field environment of fe3+ ions or by the spin-spin relaxation mechanism, which causes an ...
The EPR spectrum of first nearest neighbour pairs of Fe 3+ ions substituting for Al 3+ ions in beryl is reported. The form of the pair spin Hamiltonian is discussed, and operator equivalent factors for fourth-order terms are tabulated. The Fe 3+ pair interionic coupling corresponds to isotro...
The concentrations of the Fe ions and their sites have been obtained with ±0·001 mol% precision (resolution, repeatability) for the test series of glasses. Accuracy could not be established because there is no other method that could provide better than the ±0·3 wt% received with the ...
SiO2 is only present as Fe2+ ions. The XPS spectra of Fe 2p and Fe 3p peaks for 2FeO?SiO2 Table 1 Peak positions and FWHM of the XPS Fe 3p peak for Fe3+ obtained from Fe2O3 and for Fe2+ obtained from 2FeO?SiO2. The table also shows the ratios of Fe2+ and Fe3+ for Fe3O...
[Study of the growth of a strain of Pseudomonas fluorescens, R type. 3. Role of Fe 3+ ions][Article in French]B WurtzC R Seances Soc Biol FilComptes rendus des séances de la Société de biologie et de ses filiales... B Wurtz - 《Comptes Rendus Des Séances De La Société De Bio...
TlInS 2 single crystal doped by paramagnetic Fe ions has been studied at room temperature by electron paramagnetic resonance (EPR) technique. The fine structure of EPR spectra of the paramagnetic Fe 3+ ions is observed. The spectra were interpreted to correspond to the transitions among the spin...
Using fluorometric assay, the limit of detection (LOD) of glucose and Fe3+ ions was found to be 0.56 μM and 4.2 nM respectively. More importantly, the synthesized IRMOF-3 is also utilized for detection of glucose and Fe3+ ions in bio-environmental samples. Graphical abstract Download...
Effect of injection of hydrogen ions, followed by their evaporation, has been investigated in the Zn 1 xFe xO ( x = 0.02–0.07) pellets to throw some light... A Samariya,RK Singhal,S Kumar,... - 《Materials Chemistry & Physics》 被引量: 50发表: 2010年 The magnetic and structural ...
The contamination effects of Fe 3+ and Al 3+ on the performance of polymer electrolyte membrane fuel cells were investigated by continuously injecting Fe 3+ or Al 3+ salt solution into the air stream of an operating fuel cell. Both metal ions individually caused significant cell performance degr...
nanopowder with high crystallinity and phase purity typically requires specialized equipment and controlled heat treatment due to the instability of Fe2+ ions... Saman Soltani Alasvand,Sahar Mollazadeh Beidokhti,Jalil Vahdati Khaki,... - Ceramics International 被引量: 0 Preparation and characterizat...