Formation of solid thorium monoxide at near-ambient conditions as observed by neutron reflectometry and interpreted by screened hybrid functional calculations
Abstract
Oxidation of a ~1000 Å sputter-deposited thorium thin film at 150 °C in 100 ppm of flowing oxygen in argon produces the long-sought solid form of thorium monoxide. Changes in the scattering length density (SLD) distribution in the film over the 700-min experiment measured by in-situ, dynamic neutron reflectometry (NR) shows the densities, compositions and thickness of the various thorium oxides layers formed. Screened, hybrid density-functional theory calculations of potential thorium oxides aid interpretation, providing atomic-level picture and energetics for understanding oxygen migration. NR provided evidence of the formation of substoichiometric thorium oxide, ThOy (y < 1) at the interface between the unreacted thorium metal and its dioxide overcoat which grows inward, consuming the thorium at a rate of 2.1 Å/min while y increases until reaching 1:1 oxygen-to-thorium. Its presence indicates that kinetically-favored solid-phase ThO can be preferentially generated as a majority phase under the thermodynamically-favored ThO2 top layer at conditions close to ambient.
- Authors:
-
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of California, Davis, CA (United States). Dept. of Chemical Engineering
- Brigham Young Univ., Provo, UT (United States). Dept. of Physics and Astronomy
- Publication Date:
- Research Org.:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1469519
- Alternate Identifier(s):
- OSTI ID: 1396882
- Report Number(s):
- LA-UR-14-24055
Journal ID: ISSN 0022-3115
- Grant/Contract Number:
- AC52-06NA25396
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Nuclear Materials
- Additional Journal Information:
- Journal Volume: 487; Journal Issue: C; Journal ID: ISSN 0022-3115
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Thorium monoxide; Thorium dioxide; Neutron reflectometry; Nuclear fuel; Thin film; Oxidation; DFT
Citation Formats
He, Heming, Majewski, Jaroslaw, Allred, David D., Wang, Peng, Wen, Xiaodong, and Rector, Kirk D. Formation of solid thorium monoxide at near-ambient conditions as observed by neutron reflectometry and interpreted by screened hybrid functional calculations. United States: N. p., 2017.
Web. doi:10.1016/j.jnucmat.2016.12.046.
He, Heming, Majewski, Jaroslaw, Allred, David D., Wang, Peng, Wen, Xiaodong, & Rector, Kirk D. Formation of solid thorium monoxide at near-ambient conditions as observed by neutron reflectometry and interpreted by screened hybrid functional calculations. United States. https://doi.org/10.1016/j.jnucmat.2016.12.046
He, Heming, Majewski, Jaroslaw, Allred, David D., Wang, Peng, Wen, Xiaodong, and Rector, Kirk D. Sat .
"Formation of solid thorium monoxide at near-ambient conditions as observed by neutron reflectometry and interpreted by screened hybrid functional calculations". United States. https://doi.org/10.1016/j.jnucmat.2016.12.046. https://www.osti.gov/servlets/purl/1469519.
@article{osti_1469519,
title = {Formation of solid thorium monoxide at near-ambient conditions as observed by neutron reflectometry and interpreted by screened hybrid functional calculations},
author = {He, Heming and Majewski, Jaroslaw and Allred, David D. and Wang, Peng and Wen, Xiaodong and Rector, Kirk D.},
abstractNote = {Oxidation of a ~1000 Å sputter-deposited thorium thin film at 150 °C in 100 ppm of flowing oxygen in argon produces the long-sought solid form of thorium monoxide. Changes in the scattering length density (SLD) distribution in the film over the 700-min experiment measured by in-situ, dynamic neutron reflectometry (NR) shows the densities, compositions and thickness of the various thorium oxides layers formed. Screened, hybrid density-functional theory calculations of potential thorium oxides aid interpretation, providing atomic-level picture and energetics for understanding oxygen migration. NR provided evidence of the formation of substoichiometric thorium oxide, ThOy (y < 1) at the interface between the unreacted thorium metal and its dioxide overcoat which grows inward, consuming the thorium at a rate of 2.1 Å/min while y increases until reaching 1:1 oxygen-to-thorium. Its presence indicates that kinetically-favored solid-phase ThO can be preferentially generated as a majority phase under the thermodynamically-favored ThO2 top layer at conditions close to ambient.},
doi = {10.1016/j.jnucmat.2016.12.046},
journal = {Journal of Nuclear Materials},
number = C,
volume = 487,
place = {United States},
year = {Sat Feb 04 00:00:00 EST 2017},
month = {Sat Feb 04 00:00:00 EST 2017}
}
Web of Science
Works referenced in this record:
Thorium-thorium dioxide phase equilibria
journal, January 1969
- Benz, R.
- Journal of Nuclear Materials, Vol. 29, Issue 1
Synthesis and Properties of a Fifteen-Coordinate Complex: The Thorium Aminodiboranate [Th(H3BNMe2BH3)4]
journal, March 2010
- Daly, Scott R.; Piccoli, Paula M. B.; Schultz, Arthur J.
- Angewandte Chemie International Edition, Vol. 49, Issue 19
Modelling heat capacity, thermal expansion, and thermal conductivity of dioxide components of inert matrix fuel
journal, June 2006
- Sobolev, V.; Lemehov, S.
- Journal of Nuclear Materials, Vol. 352, Issue 1-3
VAPOR PRESSURE OF THORIUM 1
journal, March 1960
- Darnell, A. J.; McCollum, W. A.; Milne, T. A.
- The Journal of Physical Chemistry, Vol. 64, Issue 3
The pure rotational spectrum of the actinide-containing compound thorium monoxide
journal, January 2007
- Dewberry, Christopher T.; Etchison, Kerry C.; Cooke, Stephen A.
- Physical Chemistry Chemical Physics, Vol. 9, Issue 35
Experimental and Theoretical Studies of the Products of Laser-Ablated Thorium Atom Reactions with H 2 O in Excess Argon
journal, June 2002
- Liang, Binyong; Andrews, Lester; Li, Jun
- Journal of the American Chemical Society, Vol. 124, Issue 23
Matrix Infrared Spectra and Theoretical Studies of Thorium Oxide Species: ThO x and Th 2 O y
journal, December 2011
- Andrews, Lester; Gong, Yu; Liang, Binyong
- The Journal of Physical Chemistry A, Vol. 115, Issue 50
Probing actinide electronic structure using fluorescence and multi-photon ionization spectroscopy
journal, January 2006
- Heaven, Michael C.
- Physical Chemistry Chemical Physics, Vol. 8, Issue 39
Theoretical study of thorium monoxide for the electron electric dipole moment search: Electronic properties of H 3 Δ 1 in ThO
journal, January 2015
- Skripnikov, L. V.; Titov, A. V.
- The Journal of Chemical Physics, Vol. 142, Issue 2
The preparation and characterization of the metastable monoxides of thorium and uranium
journal, November 1973
- Ackermann, R. J.; Rauh, E. G.
- Journal of Inorganic and Nuclear Chemistry, Vol. 35, Issue 11
The Composition and Properties of the Solid Produced by Reaction of Thorium with Hydrochloric Acid
journal, November 1962
- Newbury, Ray S.; Searcy, Alan W.
- Inorganic Chemistry, Vol. 1, Issue 4
Characterization of Chemical Speciation in Ultrathin Uranium Oxide Layered Films
journal, November 2012
- He, Heming; Wang, P.; Allred, D. D.
- Analytical Chemistry, Vol. 84, Issue 23
SPEAR — ToF neutron reflectometer at the Los Alamos Neutron Science Center
journal, November 2011
- Dubey, M.; Jablin, M. S.; Wang, P.
- The European Physical Journal Plus, Vol. 126, Issue 11
In-Plane Correlations in a Polymer-Supported Lipid Membrane Measured by Off-Specular Neutron Scattering
journal, March 2011
- Jablin, Michael S.; Zhernenkov, Mikhail; Toperverg, Boris P.
- Physical Review Letters, Vol. 106, Issue 13
Ab initiomolecular dynamics for liquid metals
journal, January 1993
- Kresse, G.; Hafner, J.
- Physical Review B, Vol. 47, Issue 1, p. 558-561
Projector augmented-wave method
journal, December 1994
- Blöchl, P. E.
- Physical Review B, Vol. 50, Issue 24, p. 17953-17979
From ultrasoft pseudopotentials to the projector augmented-wave method
journal, January 1999
- Kresse, G.; Joubert, D.
- Physical Review B, Vol. 59, Issue 3, p. 1758-1775
Hybrid functionals based on a screened Coulomb potential
journal, May 2003
- Heyd, Jochen; Scuseria, Gustavo E.; Ernzerhof, Matthias
- The Journal of Chemical Physics, Vol. 118, Issue 18
Erratum: “Hybrid functionals based on a screened Coulomb potential” [J. Chem. Phys. 118, 8207 (2003)]
journal, June 2006
- Heyd, Jochen; Scuseria, Gustavo E.; Ernzerhof, Matthias
- The Journal of Chemical Physics, Vol. 124, Issue 21
Accurate treatment of solids with the HSE screened hybrid
journal, October 2010
- Henderson, Thomas M.; Paier, Joachim; Scuseria, Gustavo E.
- physica status solidi (b), Vol. 248, Issue 4
Energy band gaps and lattice parameters evaluated with the Heyd-Scuseria-Ernzerhof screened hybrid functional
journal, November 2005
- Heyd, Jochen; Peralta, Juan E.; Scuseria, Gustavo E.
- The Journal of Chemical Physics, Vol. 123, Issue 17
Effect of spin-orbit coupling on the actinide dioxides AnO 2 (An=Th, Pa, U, Np, Pu, and Am): A screened hybrid density functional study
journal, October 2012
- Wen, Xiao-Dong; Martin, Richard L.; Roy, Lindsay E.
- The Journal of Chemical Physics, Vol. 137, Issue 15
Screened hybrid and DFT + U studies of the structural, electronic, and optical properties of U 3 O 8
journal, November 2012
- Wen, Xiao-Dong; Martin, Richard L.; Scuseria, Gustavo E.
- Journal of Physics: Condensed Matter, Vol. 25, Issue 2
First-principle study of B1-like thorium carbide, nitride and oxide
journal, July 2006
- Shein, I. R.; Shein, K. I.; Ivanovskii, A. L.
- Journal of Nuclear Materials, Vol. 353, Issue 1-2
The theory of the formation of protective oxide films on metals, II
journal, January 1940
- Mott, N. F.
- Transactions of the Faraday Society, Vol. 35
Controlling Oxidation States in Uranium Oxides through Epitaxial Stabilization
journal, November 2007
- Burrell, A. K.; McCleskey, T. M.; Shukla, P.
- Advanced Materials, Vol. 19, Issue 21
Preparation of Epitaxial Uranium Dicarbide Thin Films by Polymer-Assisted Deposition
journal, October 2013
- Jilek, Robert E.; Bauer, Eve; Burrell, Anthony K.
- Chemistry of Materials, Vol. 25, Issue 21
Determination of the Insulation Gap of Uranium Oxides by Spectroscopic Ellipsometry and Density Functional Theory
journal, August 2013
- He, Heming; Andersson, David A.; Allred, David D.
- The Journal of Physical Chemistry C, Vol. 117, Issue 32
Infrared Spectra of H 2 ThS and H 2 US in Noble Gas Matrixes: Enhanced H-An-S Covalent Bonding
journal, September 2013
- Wang, Xuefeng; Andrews, Lester; Thanthiriwatte, K. Sahan
- Inorganic Chemistry, Vol. 52, Issue 18
Surface Reaction between Oxygen and Thorium
journal, January 1954
- Gerds, A. F.; Mallett, M. W.
- Journal of The Electrochemical Society, Vol. 101, Issue 4
The Reaction between Oxygen and Thorium
journal, May 1951
- Levesque, Pascal; Cubicciotti, Daniel
- Journal of the American Chemical Society, Vol. 73, Issue 5
Works referencing / citing this record:
Dependency of f states in fluorite-type XO 2 (X = Ce, Th, U) on the stability and electronic state of doped transition metals
journal, January 2019
- Ding, Qian; Qiu, Ruizhi; Ao, Bingyun
- Physical Chemistry Chemical Physics, Vol. 21, Issue 47