Electron paramagnetic resonance of rhyolite and gamma-irradiated trona minerals

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dc.contributor.authorKoksal, E
dc.contributor.authorKoseoglu, R
dc.contributor.authorBasaran, EB
dc.date.accessioned2019-08-01T13:38:39Z
dc.date.available2019-08-01T13:38:39Z
dc.date.issued2003
dc.departmentNiğde ÖHÜ
dc.description.abstractRhyolite from the "Yellow Stone of Nevsehir" and gamma-irradiated trona from the Ankara Mine have been investigated by electron paramagnetic resonance at ambient temperature and at 113 K. Rhyolite was examined by X-ray powder diffraction and found to consist mainly of SiO2. Before gamma-irradiation, the existing paramagnetic species in rhyolite were identified as PO42-, CH2OH, CO3-, SO2-, CO33-, and CO2- free radicals and Fe3+ at ambient temperature. At 113 K SO2-, CO33- and CO2- radicals and Fe3+ were observed. The gamma-irradiation produced neither new species nor detectable effects on these free radicals. The disappearance of some of the radicals at 113 K is attributed to the freezing of their motions. Before gamma-irradiation, the trona mineral shows only Mn2+ lines, but after gamma-irradiation it indicated the inducement of CO33- and CO2- radicals at ambient temperature, 113 K, in addition to the Mn2+ lines. The g and a values of the species were determined.
dc.identifier.endpage298
dc.identifier.issn0932-0784
dc.identifier.issue45448
dc.identifier.startpage293
dc.identifier.urihttps://hdl.handle.net/11480/5713
dc.identifier.volume58
dc.identifier.wosWOS:000184274600006
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.institutionauthor[0-Belirlenecek]
dc.language.isoen
dc.publisherVERLAG Z NATURFORSCH
dc.relation.ispartofZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectelectron paramagnetic resonance
dc.subjectfree radicals
dc.subjectsilicate rhyolite
dc.subjecttrona
dc.subjectgamma-irradiation
dc.titleElectron paramagnetic resonance of rhyolite and gamma-irradiated trona minerals
dc.typeArticle

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