Single crystal E.P.R. studies of some first-row transition ions in hexaimidazole zinc(II)dichloride tetrahydrate

Structural, Magnetic and Dynamic Characterization of Liquid Crystalline Iron(III) Schiff Base Complexes with Asymmetric Ligands

“…This spectrum was analyzed by the rhombogram method [21,34,35] and indicated that the observed HS signals arise from the middle Kramers doublet when the crystal field parameters are D Ͼ 0. …”

Optical absorption, infrared, Raman, and EPR spectral studies on natural iowaite mineral

“…In addition, the broad line at g & 2 arises from Fe(III) impurity. The literature survey indicates that the observation of g = 30/7 resonances confirms that the Fe(III) impurity is under the influence of a strong tetragonal distortion from octahedral environment [10]. A close look at high-field resonances indicates a sextet, in addition to the broad band, already discussed earlier.…”

“…This type of observation has been explained, by considering that the three Kramer's doublets are populated at temperature of measurement. As mentioned in the literature [10], the observed g values range from 30/7 to 2/7, 2-6, and 2/7-6 depending upon the population of a particular Kramer's doublet. However, for a powder spectrum, the resonances at 30/7 and 2 are generally observed, due to large anisotropy in g values.…”

“…The lowfield resonances have g values of 4.279 and 3.911. These lines can be ascribed to Fe(III) resonances in the mineral sample [10], based on previous observations. Fe(III) has five unpaired electrons and hence S = 5/2.…”

Optical absorption and EPR spectral studies of vauquelinite

“…Further a number of charge compensating vacancies are responsible. Therefore that resonance line in the low field might have buried under the strong Fe(III) resonance No other location for Fe(III) except an interstitial position is reported [7]. The ground state electronic arrangement of Cu(II) is T 2g also splits into two or three components depending on the tetragonal or rhombic fields.…”