Electron paramagnetic resonance and optical absorption spectral studies on covellite mineral
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چکیده
منابع مشابه
EPR and optical absorption spectral studies on sphalerite mineral.
The mineral sphalerite (Zn,Fe)S has been characterized by a combination of X-ray diffraction, EPR and NIR spectroscopy. The optical absorption spectrum of mineral sphalerite is due to an iron impurity only, which is in a distorted octahedral environment. The g=2.2 is attributed to iron and g and A value observed in the spectrum 1.999 and 6.0 mT are assigned to Mn(II) impurity in the mineral. Th...
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Studies of the effect of substitution with 170 on the e.p.r. spectra at 9 and 35 GHz of Mo(V) in the phosphate complex of sulphite oxidase are reported. Substitution of '7O-enriched water for normal water, for samples of the enzymes reduced by sulphite in the presence of normal phosphate, produced no detectable effect on the e.p.r. signal. If phosphate substituted with 170 was used, coupling du...
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ژورنال
عنوان ژورنال: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
سال: 2008
ISSN: 1386-1425
DOI: 10.1016/j.saa.2007.12.053