J Dubrail et al 2009 J. Phys.: Conf. Ser. 190 012180 doi:10.1088/1742-6596/190/1/012180
J Dubrail1, F Farges2, L Gautron1, M Harfouche3, C Borca3 and D Grolimund3
Show affiliationsPb-LIII edge XANES and μ-XAFS experiments (bulk and μ-focalised) were performed to evaluate the speciation of radiogenic Pb in naturally irradiated monazites (ideally LaPO4) and zircons (ideally ZrSiO4) minerals after ca. one billion years. XANES spectra show that Pb is divalent in all the samples investigated. But large variation in the speciation of Pb has been evidenced from monazites to zircons. Ab-initio calculations (FEFF8.4) were preliminary tested in a set of Pb-sulfide, oxide, carbonate, phosphate and silicate minerals and converged using Dirac-Hara exchange potentials. In monazite, XANES spectra calculations results are consistent with Pb substituting to La.
Issue 1 (2009)
J Dubrail et al 2009 J. Phys.: Conf. Ser. 190 012180
T T Gien 2001 J. Phys. B: At. Mol. Opt. Phys. 34 L535
A. Reiners et al. 2010 ApJ 710 432
S Gomès et al 2007 J. Phys. D: Appl. Phys. 40 6677
S F J Cox 2009 Rep. Prog. Phys. 72 116501
S C Shen et al 2009 J. Micromech. Microeng. 19 125017
A. O. Jaunsen et al. 2008 ApJ 681 453
Ana F Maia and Linda V E Caldas 2005 Phys. Med. Biol. 50 3837
Nobuhiko Shinzawa 2000 J. Phys. A: Math. Gen. 33 3957
Masahito Hayashi 2001 J. Phys. A: Math. Gen. 34 3413