Fundamental chemistry and materials science of americium in selected immobilization glasses

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We have pursued some of the fundamental chemistry and materials science of Am in 3 glass matrices, two being high-temperature (850 and 1400 C mp) silicate-based glasses and the third a sol-gel glass. Optical spectroscopy was the principal tool. One aspect of this work was to determine the oxidation state exhibited by Am in these matrices, as well as factors that control or may alter this state. A correlation was noted between the oxidation state of the f-elements in the two high-temperature glasses with their high-temperature oxide chemistries. One exception was Am: although AmO{sub 2} is the stable oxide encountered ... continued below

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11 p.

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Haire, R.G. & Stump, N.A. December 1, 1996.

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  • Haire, R.G. Oak Ridge National Lab., TN (United States)
  • Stump, N.A. Winston-Salem State Univ., NC (United States). Dept. of Physical Sciences

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Description

We have pursued some of the fundamental chemistry and materials science of Am in 3 glass matrices, two being high-temperature (850 and 1400 C mp) silicate-based glasses and the third a sol-gel glass. Optical spectroscopy was the principal tool. One aspect of this work was to determine the oxidation state exhibited by Am in these matrices, as well as factors that control or may alter this state. A correlation was noted between the oxidation state of the f-elements in the two high-temperature glasses with their high-temperature oxide chemistries. One exception was Am: although AmO{sub 2} is the stable oxide encountered in air, when this dioxide was incorporated into the high-temperature glasses, only trivalent Am was found in the products. When Am(III) was used to prepare the sol-gel glasses at ambient temperature, and after these products were heated in air to 800 C, only Am(III) was observed. Potential explanations for the unexpected Am behavior is offered in the context of its basic chemistry. Experimental spectra, spectroscopic assignments, etc. are discussed.

Physical Description

11 p.

Notes

INIS; OSTI as DE97000620

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  • 1996 Fall meeting of the Materials Research Society (MRS), Boston, MA (United States), 2-6 Dec 1996

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  • Other: DE97000620
  • Report No.: CONF-961202--5
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 419334
  • Archival Resource Key: ark:/67531/metadc674596

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Office of Scientific & Technical Information Technical Reports

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  • December 1, 1996

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  • July 25, 2015, 2:20 a.m.

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  • Jan. 19, 2016, 1:53 p.m.

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Haire, R.G. & Stump, N.A. Fundamental chemistry and materials science of americium in selected immobilization glasses, article, December 1, 1996; Tennessee. (digital.library.unt.edu/ark:/67531/metadc674596/: accessed December 11, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.