|
|
Article: Reports summarize inorganic chemistry study results from R.C. Belin and co-researchers.
- Article from:
- Chemicals & Chemistry
- Article date:
- July 24, 2009
CopyrightCOPYRIGHT 2009 NewsRX. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
|
"Our works shows that the americium pyrochlore (241)AM(2)Zr(2)O(7) undergoes a phase transition to a defect-fluorite structure along with an unusual volume contraction when subjected to internal radiation from a-emitting actinides. Disorder relaxation proceeds through the simultaneous formation of cation antisites and oxygen Frenkel pairs," investigators in France report.
"X-ray absorption spectroscopy at the Am-L-II and the Zr-K edges reveals that Am-O polyhedra show an increasing disorder with increasing exposure. In contrast, the Zr-O polyhedral units remain highly ordered, while rotating along edges and corners, thereby reducing the structural strain imposed ...