Uranium-bearing francolites present in organic-rich limestones of NW Greece

• Verfasst von: Tzifas, Ioannis [VerfasserIn]
• Verfasst von: Glasmacher, Ulrich A. [VerfasserIn]
• Verfasst von: Misaēlidēs, Panagiōtēs [VerfasserIn]
• Titel: Uranium-bearing francolites present in organic-rich limestones of NW Greece
• Titelzusatz: a preliminary study using synchrotron radiation and fission track techniques
• Verf.angabe: I.T. Tzifas, U.A. Glasmacher, P. Misaelides, A. Godelitsas, P.N. Gamaletsos, J. Goettlicher, D. Françoso de Godoy
• Umfang: 8 S.
• Fussnoten: Gesehen am 12.07.2017 ; Published online 4 August 2016
• Titel Quelle: Enthalten in: Journal of radioanalytical and nuclear chemistry
• Jahr Quelle: 2017
• Band/Heft Quelle: 311(2017), 1, S. 465-472
• ISSN Quelle: 1588-2780
• DOI: doi:10.1007/s10967-016-4973-4
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1560739037

Abstract

Synchrotron radiation techniques (μ-XRF and μ-XANES) were applied to the study of organic-rich phosphatized limestones of NW Greece (Epirus). The results revealed uranium accumulation in areas of the material containing, among others, carbonate apatite (francolite) and organic matter. The UL3-edge of μ-XANES spectra showed that uranium was present in tetravalent form. U-bearing francolite crystals were separated from the rock and characterized by Raman spectroscopy and microprobe. The analysis of the crystals also indicated the presence of sodium and sulfur. The uranium presence in the crystals was also visualized, after neutron irradiation and etching, by the observation of the fission tracks.