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Title: Quasielastic neutron scattering with in situ humidity control: Water dynamics in uranyl fluoride

Abstract

The authors confirm that water vapor pressure is the driving thermodynamic force for the conversion of the anhydrous structure to [(UO2F2)(H2O)]7 ∙ (H2O)4, and they demonstrate the feasibility of extending this approach to aqueous forms of UO2F2+ xH2O. This method has general applicability to systems in which water content itself is a driving variable for structural or dynamical phase transitions.

Authors:
ORCiD logo; ; ORCiD logo; ORCiD logo; ;
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1241410
Alternate Identifier(s):
OSTI ID: 1240556; OSTI ID: 1421158
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Published Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Name: Journal of Applied Physics Journal Volume: 119 Journal Issue: 9; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Miskowiec, A., Kirkegaard, M. C., Herwig, K. W., Trowbridge, L., Mamontov, E., and Anderson, B. Quasielastic neutron scattering with in situ humidity control: Water dynamics in uranyl fluoride. United States: N. p., 2016. Web. doi:10.1063/1.4943164.
Miskowiec, A., Kirkegaard, M. C., Herwig, K. W., Trowbridge, L., Mamontov, E., & Anderson, B. Quasielastic neutron scattering with in situ humidity control: Water dynamics in uranyl fluoride. United States. https://doi.org/10.1063/1.4943164
Miskowiec, A., Kirkegaard, M. C., Herwig, K. W., Trowbridge, L., Mamontov, E., and Anderson, B. Mon . "Quasielastic neutron scattering with in situ humidity control: Water dynamics in uranyl fluoride". United States. https://doi.org/10.1063/1.4943164.
@article{osti_1241410,
title = {Quasielastic neutron scattering with in situ humidity control: Water dynamics in uranyl fluoride},
author = {Miskowiec, A. and Kirkegaard, M. C. and Herwig, K. W. and Trowbridge, L. and Mamontov, E. and Anderson, B.},
abstractNote = {The authors confirm that water vapor pressure is the driving thermodynamic force for the conversion of the anhydrous structure to [(UO2F2)(H2O)]7 ∙ (H2O)4, and they demonstrate the feasibility of extending this approach to aqueous forms of UO2F2+ xH2O. This method has general applicability to systems in which water content itself is a driving variable for structural or dynamical phase transitions.},
doi = {10.1063/1.4943164},
journal = {Journal of Applied Physics},
number = 9,
volume = 119,
place = {United States},
year = {Mon Mar 07 00:00:00 EST 2016},
month = {Mon Mar 07 00:00:00 EST 2016}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1063/1.4943164

Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

Figures / Tables:

FIG. 1 FIG. 1: Crystal structures of uranyl fluoride. Oxygen is red, fluorine green, and uranium grey. Top: anhydrous uranyl fluoride (UO2F2). The uranyl-centered units are hexagonal bipyramids with the divalent uranyl ion pointing along the c direction. The c axis is inclined 30° from normal to the page in this diagram.more » Bottom: uranyl fluoride hydrate ([UO2F2(H2O)]7 · (H2O)4) with hydrogens and hydrogen-bonded waters omitted. The fundamental polymerization units in this structure are pentagonal bipyramids composed of UO2F4(H2O). These units compose a series of edge- and vertex-sharing rings. Four of the seven waters per structural unit are hydrogen bonded to uranyl ligand water molecules and reside inside the 5×15 Å pore that runs along the b axis.« less

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