EXAFS study of (La{sub 1{minus}X}Ce{sub X}){sub 2}Zr{sub 2}O{sub 7}

Book · Sun Dec 31 04:00:00 EST 1995

OSTI ID:382852

Yokoi, Hiroto; Matsui, Tsuneo ^[1]; Ohno, Hideo ^[2]; Kobayashi, Katsumi ^[3]

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1. Nagoya Univ. (Japan). Dept. of Nuclear Engineering
2. Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Office of Synchrotron Radiation Facility Project
3. National Lab. for High Energy Physics, Tsukuba, Ibaraki (Japan). Photon Factory

The local structures around Zr atoms such as coordination number of oxygen and cations, and the Zr-O and Zr-Ln (Ln; La, Ce)interatomic distances in the (La{sub 1{minus}X}Ce{sub X}){sub 2}Zr{sub 2}O{sub 7} pyrochlore compounds (X = 0--0.25), where Ce is a simulation of actinides, were studied by means of extended X-ray absorption fine structure (EXAFS) spectrometry. The local structure determined by EXAFS in this study is discussed in relation to the dissolution behavior of (La{sub 1{minus}X}Ce{sub X}){sub 2}Zr{sub 2}O{sub 7} (leaching rates of Zr, La and Ce) in an acid solution (pH = 1) at 363K reported previously. The difference in the local structure before and after leaching test was also investigated.

• OSTI ID: 382852
• Report Number(s): CONF-941075--; ISBN 1-55899-253-7
• Country of Publication: United States
• Language: English

Related Subjects

05 NUCLEAR FUELS
36 MATERIALS SCIENCE
ABSORPTION SPECTROSCOPY
CERIUM OXIDES
CRYSTAL STRUCTURE
EXPERIMENTAL DATA
HIGH-LEVEL RADIOACTIVE WASTES
LANTHANUM OXIDES
RADIOACTIVE WASTE DISPOSAL
WASTE FORMS
X-RAY SPECTROSCOPY
ZIRCONIUM OXIDES