Plutonium and neptunium incorporation in zirconolite

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dc.contributor.authorBegg, BDen_AU
dc.contributor.authorVance, ERen_AU
dc.contributor.authorDay, RAen_AU
dc.contributor.authorHambley, Men_AU
dc.contributor.authorConradson, SDen_AU
dc.date.accessioned2024-04-22T05:25:08Zen_AU
dc.date.available2024-04-22T05:25:08Zen_AU
dc.date.issued1997en_AU
dc.date.statistics2024-04-22en_AU
dc.descriptionPhysical copy held by ANSTO at DDC: 621.4838/31. Abstract also available online at https://doi.org/10.1557/PROC-465-325.en_AU
dc.description.abstractThe incorporation of Pu and Np in zirconolite (CaZrTi2O7) has been investigated over a range of redox conditions. Zirconolite formulations designed to favour either trivalent or tetravalent Pu and Np were prepared by limiting the amount of charge compensating additives available to maintain electroneutrality. From near-edge X-ray absorption spectroscopy the Pu valence state was found to vary with the processing atmosphere, from completely tetravalent when fired in air, and located on either the Ca or Zr sites, to trivalent, when substituted on the Ca site after annealing in 3.5% H2/N2. Np was predominantly tetravalent over the range of redox conditions examined and was readily incorporated on either of zirconolite's Ca or Zr sites. The charge compensation mechanisms at work in different zirconolites are also discussed. © Materials Research Society 1997en_AU
dc.identifier.booktitleMaterial Research Society Symposium Proceedings Volume 465, Symposium held December 2-6 , 1996, Boston, Massachusetts, U. S. A.en_AU
dc.identifier.citationBegg, B. D., Vance, E. R., Day, R. A., Hambley. M., & Conradson, S. D. (1996). Plutonium and neptunium incorporation in zirconolite. Paper presented to the Scientific Basis for Nuclear Waste Management XX, 2-6 December 1996, Boston, Massachachuetts, U. S. A. In Gray, W. J. & Triay, I. R. (Eds.), Material Research Society Symposium Proceedings, Symposium held December 2-6 , 1996, Boston, Massachusetts, U. S. A., (Vol. 465, pp. 325-332).en_AU
dc.identifier.conferenceenddate1996-12-06en_AU
dc.identifier.conferencenameScientific Basis for Nuclear Waste Management XXen_AU
dc.identifier.conferenceplaceBoston, Massachachuettsen_AU
dc.identifier.conferencestartdate1996-12-02en_AU
dc.identifier.editorsGray, W. J. & Triay, I. R.en_AU
dc.identifier.isbn155899369Xen_AU
dc.identifier.pagination325-332en_AU
dc.identifier.placeofpublicationUnited States of Americaen_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15564en_AU
dc.identifier.volume465en_AU
dc.language.isoenen_AU
dc.publisherMaterials Research Societyen_AU
dc.relation.urihttps://doi.org/10.1557/PROC-465-325en_AU
dc.subjectPlutoniumen_AU
dc.subjectNeptuniumen_AU
dc.subjectZirconoliteen_AU
dc.subjectRedox processen_AU
dc.subjectAbsorptionen_AU
dc.subjectAnnealingen_AU
dc.subjectAiren_AU
dc.subjectValenceen_AU
dc.titlePlutonium and neptunium incorporation in zirconoliteen_AU
dc.typeConference Paperen_AU
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