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Title: An unconventional method for measuring the Tc L3-edge of technetium compounds
Authors: Blanchard, PER
Reynolds, EM
Kennedy, BJ
Ling, CD
Zhang, Z
Thorogood, GJ
Cowie, BCC
Thomsen, L
Keywords: Spectra
Issue Date: 1-Jan-2014
Publisher: Journal of Synchrotron Radiation
Citation: Blanchard, P. E. R., Reynolds, E., Kennedy, B. J., Ling, C. D., Zhang, Z., Thorogood, G., Cowie, B, C. C., & Thomsen, L. (2014). An unconventional method for measuring the Tc L3-edge of technetium compounds. Journal of Synchrotron Radiation, 21(6), 1275-1281. doi:10.1107/S1600577514014891
Abstract: Tc L3-edge XANES spectra have been collected on powder samples of SrTcO3 (octahedral Tc4+) and NH4TcO4 (tetrahedral Tc7+) immobilized in an epoxy resin. Features in the Tc L3-edge XANES spectra are compared with the pre-edge feature of the Tc K-edge as well as other 4d transition metal L3-edges. Evidence of crystal field splitting is obvious in the Tc L3-edge, which is sensitive to the coordination number and oxidation state of the Tc cation. The Tc L3 absorption edge energy difference between SrTcO3 (Tc4+) and NH4TcO4 (Tc7+) shows that the energy shift at the Tc L3-edge is an effective tool for studying changes in the oxidation states of technetium compounds. The Tc L3-edge spectra are compared with those obtained from Mo and Ru oxide standards with various oxidation states and coordination environments. Most importantly, fitting the Tc L3-edge to component peaks can provide direct evidence of crystal field splitting that cannot be obtained from the Tc K-edge. © International Union of Crystallography.
Gov't Doc #: 6724
Appears in Collections:Journal Articles

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