Table 3 Summary of Am M5-edge HR-XANES, Am L3-edge and Zr K-edge XANES and EXAFS analyses of the identified Am and Zr chemical species

From: Structural and chemical insights on the incorporation of americium into zircaloy-derived monoclinic zirconia

Identified chemical species

Local environment

Relative amount occurring

Assigned phase

Am3+

Cubic

80 ± 1%

C-type (Am4+/3+1-xZrx)2O3+x

Am4+

Distorted monocapped octahedron

20 ± 1%

m-(Am4+0.011(7)Zr4+0.989(7))O2

Zr4+

Distorted monocapped octahedron

99 ± 1%

m-(Am4+0.011(7)Zr4+0.989(7))O2

  1. The relative amounts of Am oxidation states were determined from linear combination fitting of the XANES data.
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