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Please use this identifier to cite or link to this item: http://apo.ansto.gov.au/dspace/handle/10238/6386

Title: The incorporation of neptunium and plutonium in thorutite (ThTi2O6)
Authors: Zhang, Y
Gregg, DJ
Lumpkin, GR
Begg, BD
Jovanovic, M
Keywords: NEPTUNIUM
PLUTONIUM
EXPERIMENTAL DATA
RUTILE
ALKOXIDES
OXYGEN
Issue Date: 25-Dec-2013
Publisher: Elsevier
Citation: Zhang, Y., Gregg, D. J., Lumpkin, G. R., Begg, B. D., & Jovanovic, M. (2013). The incorporation of neptunium and plutonium in thorutite (ThTi2O6). Journal of Alloys and Compounds, 581, 665-670.
Abstract: The incorporation of neptunium (Np) and plutonium (Pu) into the brannerite structured lattice was studied using thorutite (ThTi2O6) as host lattice and sintering in air. The uncompensated Np and Pu doped samples and the low Y-charge compensated Np and Pu doped samples showed main phases as designed together with trace amounts of rutile. Those samples with larger amounts of Y produced yttrium pyrochlores as an additional minor phase. XRD analyses reveal anisotropic changes of the cell parameters; the a-parameter contracts while b- and c-parameters expand with mean cationic radius. This is in reasonable agreement with previous experimental data on ThTi2O6 and Ce0.975Ti2O5.95. Attempts to form Np or Pu valences >4+ by adding Y as a charge compensator were unsuccessful, suggesting that tetravalent Np and Pu ions are favoured in air-fired thorutite. © 2013, Elsevier B.V.
URI: http://dx.doi.org/10.1016/j.jallcom.2013.07.115
http://apo.ansto.gov.au/dspace/handle/10238/6386
ISSN: 0925-8388
Appears in Collections:Journal Articles

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