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dc.contributor.authorPopel, Aleksejen
dc.contributor.authorBeng Thye, Tanen
dc.contributor.authorThomas, Gouderen
dc.contributor.authorGiulio, Lamprontien
dc.contributor.authorJason, Dayen
dc.contributor.authorRachel, Eloirdien
dc.contributor.authorAlice, Seiberten
dc.contributor.authorIan, Farnanen
dc.date.accessioned2018-11-17T00:31:02Z
dc.date.available2018-11-17T00:31:02Z
dc.date.issued2019-01-15en
dc.identifier.issn0169-4332
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/285353
dc.description.abstractA secondary phase has been observed to nucleate on the surface of UO2 in a solution with uranium concentration values of ~10-9 mol/l. The UO2 was in the form of a 100 nm single crystalline film of UO2 epitaxially deposited on the (001) surface of a single crystalline silicon substrate. An extended (140 days) dissolution experiment with UO2 in contact with a solution in deoxygenated, deionised water, under an Ar atmosphere (~0.1 O2 ppm) at ambient temperature (~25 °C) suggests that uranium dioxide should dissolve and precipitate while remaining in the U4+ oxidation state to enable nucleation of a low solubility secondary phase. A mechanism for the anoxic dissolution of UO2 in deionised water is proposed that involves U4+ dissolution at defect sites that subsequently nucleate and precipitate in a less defective form.
dc.description.sponsorshipB.T. Tan acknowledges funding from the Singapore Nuclear and Research Safety Initiative (SNRSI).
dc.publisherElsevier
dc.titleSurface alteration evidence for a mechanism of anoxic dissolution of UO2en
dc.typeArticle
prism.endingPage379
prism.publicationDate2019en
prism.publicationNameApplied Surface Scienceen
prism.startingPage376
prism.volume464en
dc.identifier.doi10.17863/CAM.32720
dcterms.dateAccepted2018-09-10en
rioxxterms.versionofrecord10.1016/j.apsusc.2018.09.094en
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2019-01-15en
dc.contributor.orcidPopel, Aleksej [0000-0003-4436-9961]
dc.identifier.eissn1873-5584
rioxxterms.typeJournal Article/Reviewen
cam.issuedOnline2018-09-11en
rioxxterms.freetoread.startdate2019-09-11


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