DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: In Situ High-Temperature Raman Spectroscopy of UCl3: A Combined Experimental and Theoretical Study

Journal Article · · Inorganic Chemistry
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]
  1. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
  2. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Arizona State University, Tempe, AZ (United States)

Uranium trichloride (UCl3) has received growing interest for its use in uranium-fueled molten salt reactors and in the pyrochemical processing of used fuel. In this paper, we report for the first time the experimentally determined Raman spectra of UCl3, at both ambient condition and in situ high temperatures up to 871 K. The frequencies of five of the Raman-active vibrational modes (vi) of UCl3 exhibit a negative temperature derivative ((∂νi/∂T)P) with increasing temperature. Here, this red-shift behavior is likely due to the elongation of U–Cl bonds. The average isobaric mode Grüneisen parameter (γiP = 0.91 ± 0.02) of UCl3 was determined through use of the coefficient of thermal expansion published in Vogel et al. (2021) and the (∂νi/∂T)P values determined in this study. These results are in general agreement with those calculated here by density functional theory (DFT+U). Finally, a comparison of the ambient band positions of UCl3 to those of isostructural lanthanide (La–Eu) and actinide chlorides (Am–Cf) has been made.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
89233218CNA000001; NE0009444
OSTI ID:
2205066
Report Number(s):
LA-UR--23-30105
Journal Information:
Inorganic Chemistry, Journal Name: Inorganic Chemistry Journal Issue: 45 Vol. 62; ISSN 0020-1669
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

References (58)

VESTA 3 for three-dimensional visualization of crystal, volumetric and morphology data journal October 2011
Raman spectra of selected transuranium trihalides in the solid state journal October 1988
Density-functional calculation of effective Coulomb interactions in metals journal April 1991
First-principles phonon calculations of thermal expansion in Ti 3 SiC 2 , Ti 3 AlC 2 , and Ti 3 GeC 2 journal May 2010
Benefits of using multiple Raman laser wavelengths for characterizing defects in a UO 2 matrix journal February 2022
Oxidation and anion lattice defect signatures of hypostoichiometric lanthanide-doped UO2 journal March 2020
CURIES: Compendium of uranium Raman and infrared experimental spectra journal December 2023
Generalized gradient approximation for the exchange-correlation hole of a many-electron system journal December 1996
Measurements of the liquidus surface and solidus transitions of the NaCl–UCl3 and NaCl–UCl3–CeCl3 phase diagrams journal November 2015
Crystal chemical studies of the 5f-series of elements. I. New structure types journal November 1948
Thermophysical properties of liquid chlorides from 600 to 1600 K: Melt point, enthalpy of fusion, and volumetric expansion journal January 2022
Transporting and Storing High-Level Nuclear Waste in the U.S.—Insights from a Mathematical Model journal June 2019
Challenges with vitrification of Hanford High-Level Waste (HLW) to borosilicate glass – An overview journal December 2019
Phonon frequencies of rare earth trichlorides with unit cells of different dimensions journal November 1970
Ab initio molecular dynamics (AIMD) simulations of NaCl, UCl3 and NaCl-UCl3 molten salts journal September 2022
Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides journal September 1976
Chapter 3. Spectrum-Fitting Methods book December 1988
The Gibbs free energies and enthalpies of formation of U (super 6+) phases; an empirical method of prediction journal April 1999
Silica book January 1994
The Raman effects of CeCl3 and PrCl3 journal September 1968
Formation enthalpies of LaLn׳O3 (Ln׳=Ho, Er, Tm and Yb) interlanthanide perovskites journal July 2015
Remote Density Measurements of Molten Salts via Neutron Radiography journal May 2021
Equations of State of Solids for Geophysics and Ceramic Science book January 1995
Communication—Mg2+/0 as a Reliable Reference Electrode for Molten Chloride Salts journal June 2021
Anisotropic elasticity of jarosite: A high-P synchrotron XRD study journal December 2009
Prediction of the thermodynamic properties of aqueous metal complexes to 1000°C and 5 kb journal April 1997
Band theory and Mott insulators: Hubbard U instead of Stoner I journal July 1991
The size of actinoid(III) ions – structural analysis vs. common misinterpretations journal July 2016
Bayesian Optimization for Calibrating and Selecting Hybrid-Density Functional Models journal April 2020
Materials Science of High-Level Nuclear Waste Immobilization journal January 2009
Effects of pressure on the luminescence, Raman and absorption spectra of 248CmCl3 journal April 1992
Accelerator-driven subcritical fission in molten salt core: Closing the nuclear fuel cycle for green nuclear energy
  • McIntyre, Peter; Assadi, Saeed; Badgley, Karie
  • APPLICATION OF ACCELERATORS IN RESEARCH AND INDUSTRY: Twenty-Second International Conference, AIP Conference Proceedings https://doi.org/10.1063/1.4802405
conference January 2013
Molten salt reactors: A new beginning for an old idea journal June 2010
Uranium carbonate complexes demonstrate drastic decrease in stability at elevated temperatures journal August 2021
The molten salt reactor (MSR) in generation IV: Overview and perspectives journal November 2014
Spent Nuclear Fuel journal December 2006
Molten-Salt Reactors—History, Status, and Potential journal February 1970
High-Pressure Structural and Thermodynamic Properties of Cerium Orthosilicates (CeSiO4) journal February 2023
Thermochemical insights into refractory ceramic materials based on oxides with large tetravalent cations journal January 2005
From ultrasoft pseudopotentials to the projector augmented-wave method journal January 1999
Raman spectroscopic studies of gadolinium trichloride as a function of temperature journal February 1989
The Effect of Pressure on the Raman and Absorption Spectra of PrCl3, PrBr3, and NdBr3 journal August 1989
Formation enthalpies of rare earth titanate pyrochlores journal June 2004
Phonons and related crystal properties from density-functional perturbation theory journal July 2001
Crystal Structure Evolution of UCl3 from Room Temperature to Melting journal September 2021
Crystal Chemistry and Thermodynamics of HREE (Er, Yb) Mixing in a Xenotime Solid Solution journal May 2022
Enthalpies of formation of U-, Th-, Ce-brannerite: implications for plutonium immobilization journal August 2003
Raman spectroscopy study of the phase transitions in rare-earth metal trichlorides journal August 2011
Erratum: Lattice Vibrations of LaCl3 and LaBr3 from Vibronic Spectra journal March 1964
Thermodynamics of CeSiO 4 : Implications for Actinide Orthosilicates journal September 2020
Brief report: The bulk modulus-volume relationship for oxides journal June 1970
U( v ) in metal uranates: a combined experimental and theoretical study of MgUO 4 , CrUO 4 , and FeUO 4 journal January 2016
Semiempirical GGA-type density functional constructed with a long-range dispersion correction journal January 2006
First principles phonon calculations in materials science journal November 2015
Raman spectra of crystalline and molten GdCl3 journal February 2010
Raman spectra of Pm2O3, PmF3, PmCl3, PmBr3 and PmI3 journal June 1988
Raman Scattering Study of the Alpha-Beta Phase Transition in Quartz journal August 1967
Identification and Decomposition of Uranium Oxychloride Phases in Oxygen-Exposed UCl3 Salt Compositions journal July 2023