X-ray absorption and luminescence spectroscopies have been used to characterize the local structure and coordination of uranium (VI) species coprecipitated with calcite (CaCO3) in room-temperature aqueous solutions. Different solution chemistries and pHs are found to result in defferences in the equatorial coordination of the uranyl species (UO2/2+) in the calcite, with multiple coordination environments of uranyl evident in one sample.
Revised: June 6, 2005 |
Published: April 6, 2001
Citation
Reeder R.J., M. Nugent, C.D. Tait, D.E. Morris, S.M. Heald, K.M. Beck, and W.P. Hess, et al. 2001.Coprecipitation of Uranium (VI) with Calcite: XAFS, Micro-XAS,and Luminescence Characterization.Geochimica et Cosmochimica Acta 65, no. 20:3491-3503.PNNL-SA-34282.