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Electron paramagnetic resonance of rhyolite and ?-irradiated Trona minerals

Date

2003

Author

Köksal F.
Köseoğlu R.
Başaran E.

Metadata

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Abstract

Rhyolite from the "Yellow Stone of Nevşehir" and ?-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 SO2. Before ?-irradiation, the existing paramagnetic species in rhyolite were identified as ?O42-, ?H2OH, ?O3-, ?O2-, ?O33-, and ?O2- free radicals and Fe3+ at ambient temperature. At 113 K ?O2-, ?O33-, and ?O2- radicals and Fe3+ were observed. The ?-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 ?-irradiation, the trona mineral shows only Mn2+ lines, but after ?-irradiation it indicated the inducement of ?O33- and ?O2- radicals at ambient temperature, 113 K, in addition to the Mn2+ lines. The g and a values of the species were determined.

Source

Zeitschrift fur Naturforschung - Section A Journal of Physical Sciences

Volume

58

Issue

05.Jun

URI

https://doi.org/10.1515/zna-2003-5-607
https://hdl.handle.net/20.500.12712/2507

Collections

  • Scopus İndeksli Yayınlar Koleksiyonu [14046]



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