[U(H2O)2]{[(UO2)10O10(OH)2][(UO4)(H2O)2]}: A Mixed-Valence Uranium Oxide Hydrate Framework.

Zhang, Y; Wei, T; Tran, TT; Lu, KT; Zhang, Z; Price, JR; Aharonovich, I; Zheng, R

[U(H2O)2]{[(UO2)10O10(OH)2][(UO4)(H2O)2]}: A Mixed-Valence Uranium Oxide Hydrate Framework.

Zhang, Y Wei, T Tran, TT Lu, KT Zhang, Z Price, JR Aharonovich, I

Zheng, R

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Publisher:: AMER CHEMICAL SOC
Publication Type:: Journal Article
Citation:: Inorganic chemistry, 2020, 59, (17), pp. 12166-12175
Issue Date:: 2020-09

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Field	Value	Language
dc.contributor.author	Zhang, Y
dc.contributor.author	Wei, T
dc.contributor.author	Tran, TT
dc.contributor.author	Lu, KT
dc.contributor.author	Zhang, Z
dc.contributor.author	Price, JR
dc.contributor.author	Aharonovich, I https://orcid.org/0000-0003-4304-3935
dc.contributor.author	Zheng, R
dc.date.accessioned	2020-11-18T04:41:08Z
dc.date.available	2020-11-18T04:41:08Z
dc.date.issued	2020-09
dc.identifier.citation	Inorganic chemistry, 2020, 59, (17), pp. 12166-12175
dc.identifier.issn	0020-1669
dc.identifier.issn	1520-510X
dc.identifier.uri	http://hdl.handle.net/10453/144114
dc.description.abstract	A uranium oxide hydrate framework, [U(H2O)2]{[(UO2)10O10(OH)2][(UO4)(H2O)2]} (UOF1), was synthesized hydrothermally using schoepite as a uranium precursor. The crystal strucutre of UOF1 was revealed with synchrotron single-crystal X-ray diffraction and confirmed with transmission electron miscroscopy. The typical uranyl oxide hydroxide layers similar to those in β-U3O8 are further connected via double-pentagonal-bipyramidal uranium polyhedra to form a three-dimensional (3D) framework structure with tetravalent uranium species inside the channels. The presence of mixed-valence uranium was investigated with a combination of X-ray absorption near-edge structure and diffuse reflectance spectroscopy. Apart from the major hexavalent uranium, evidence for tetravalent uranium was also found, consistent with the bond valence sum calculations. The successful preparation of UOF1 as the first pure uranium oxide hydrate framework sheds light on the structural understanding of the alteration of UO2+x as either a mineral or spent nuclear fuel.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	AMER CHEMICAL SOC
dc.relation.ispartof	Inorganic chemistry
dc.relation.isbasedon	10.1021/acs.inorgchem.0c01099
dc.rights	info:eu-repo/semantics/restrictedAccess
dc.subject	0302 Inorganic Chemistry, 0306 Physical Chemistry (incl. Structural), 0399 Other Chemical Sciences
dc.subject.classification	Inorganic & Nuclear Chemistry
dc.title	[U(H2O)2]{[(UO2)10O10(OH)2][(UO4)(H2O)2]}: A Mixed-Valence Uranium Oxide Hydrate Framework.
dc.type	Journal Article
utslib.citation.volume	59
utslib.location.activity	United States
utslib.for	0302 Inorganic Chemistry
utslib.for	0306 Physical Chemistry (incl. Structural)
utslib.for	0399 Other Chemical Sciences
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
pubs.organisational-group	/University of Technology Sydney
utslib.copyright.status	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2020-11-18T04:41:03Z
pubs.issue	17
pubs.publication-status	Published
pubs.volume	59
utslib.citation.issue	17

Abstract:

A uranium oxide hydrate framework, [U(H2O)2]{[(UO2)10O10(OH)2][(UO4)(H2O)2]} (UOF1), was synthesized hydrothermally using schoepite as a uranium precursor. The crystal strucutre of UOF1 was revealed with synchrotron single-crystal X-ray diffraction and confirmed with transmission electron miscroscopy. The typical uranyl oxide hydroxide layers similar to those in β-U3O8 are further connected via double-pentagonal-bipyramidal uranium polyhedra to form a three-dimensional (3D) framework structure with tetravalent uranium species inside the channels. The presence of mixed-valence uranium was investigated with a combination of X-ray absorption near-edge structure and diffuse reflectance spectroscopy. Apart from the major hexavalent uranium, evidence for tetravalent uranium was also found, consistent with the bond valence sum calculations. The successful preparation of UOF1 as the first pure uranium oxide hydrate framework sheds light on the structural understanding of the alteration of UO2+x as either a mineral or spent nuclear fuel.

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http://hdl.handle.net/10453/144114