Reaction of Plutonium Dioxide with Water: Formation and Properties of PuO 2+ x-Reference-Cited by-同舟云学术

Reaction of Plutonium Dioxide with Water: Formation and Properties of PuO 2+ x

Published:2000-01-14 Issue:5451 Volume:287 Page:285-287
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Haschke John M.¹,Allen Thomas H.²,Morales Luis A.²

Affiliation:

1. 11003 Willow Bend Drive, Waco, TX 76712, USA.

2. Los Alamos National Laboratory, Los Alamos, NM 87545, USA.

Abstract

Results show that PuO 2+ x , a high-composition ( x ≤ 0.27) phase containing Pu(VI), is the stable binary oxide in air. This nonstoichiometric oxide forms by reaction of dioxide with water and by water-catalyzed reaction of dioxide with oxygen. The PuO 2 + H 2 O reaction rate is 0.27 nanomoles per meter squared per hour at 25°C; the activation energy at 25° to 350°C is 39 kilojoules per mole. Slow kinetics and a low lattice parameter–composition dependence for fluorite-related PuO 2+ x are consistent with a failure to observe the phase in earlier studies. Perplexing aspects of plutonium oxide chemistry can now be explained.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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