Application of M $_{V}$ -edge XANES to determination of U oxidation state in zircon

Tanaka, Kazuya ; Takahashi, Yoshio*

We examined three natural zircon samples with different amounts of radiation doses using M $_{V}$ -edge and L $_{III}$ -edge U X-ray absorption near-edge structure (XANES). Analysis of XANES spectra at both M $_{V}$ -edge and L $_{III}$ -edge suggested that the oxidation state of U in the zircon sample with the highest radiation dose is tetravalent. The XANES spectra of the two other samples with lower radiation doses suggested a mixture of U(IV) and U(VI), while the possibility of U(V) was not excluded. This is the first work on the application of M $_{V}$ -edge U XANES to the oxidation state of U in natural zircon.

Language	:	English
Journal	:	Geochemical Journal
Volume	:	53
Number	:	5
Pages	:	p.329 - 331
Publication Year/Month	:	2019/00
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Paper URL	:	https://doi.org/10.2343/geochemj.2.0568
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Keywords	:	ジルコン; ウラン; XANES
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Registration No. : AA20190207
JAEA Abstracts No. : 47001597
Paper Submission No. : 22206

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Application of M-edge XANES to determination of U oxidation state in zircon

Application of M $_{V}$ -edge XANES to determination of U oxidation state in zircon