Publications

Sep, 2026

Journal

Optical Vibrational Spectroscopic Investigation of Natural and Synthetic Analogs of Uranyl Oxyhydroxyhydrate Minerals

Uranyl oxy-hydroxy-hydrate minerals are common alteration products of uraninite (UO2+x) which is chemically and structurally analogous to uranium dioxide nuclear fuel. Therefore, structural and spectroscopic investigations of these alteration minerals and their analogous anthropogenic counterparts can provide insight into the environmental behavior of nuclear fuel cycle ma…

Sep, 2026

Conference Paper

Evaluating the Performance of Commercial Silver Sorbents for Volatile Radioiodine Capture

Aug, 2026

Journal

Iodine Capture with Copper-Electroplated Nickel Foams

This work explores the use of Ni0 foam scaffolds for Cu0 coatings for use as sorbents for iodine. The Cu0 electroplating was performed from aqueous copper(II) sulfate (CuSO4) solutions under different conditions to achieve a range of Cu0-layer thicknesses (4.89 ± 1.05 μm–57.32 ± 3.95 μm) with 900 A·m–2 current densities and coating times of 15–180 min. The thickest coating…

Aug, 2026

ORNL Report

Performance Assessment of Alternative Metal Sorbents for Iodine Capture

Jul, 2026

ORNL Report

Preparation of iodine-bearing waste forms for hot isostatic pressing

May, 2026

ORNL Report

Assessment of alternative metal getter candidates

Mar, 2026

ORNL Report

M4FT-26OR0301040315 – Sorbent performance of materials prepared by additive manufacturing

Mar, 2026

Journal

Raman spectroscopic investigation of ianthinite [U24+(UO2)4O6(OH)4(H2O)4]·5H2O, a rare mixed-valence uranium oxide hydrate

Ianthinite ([U24+(UO2)4O6(OH)4(H2O)4]·5H2O) is an exotic mineral that possesses U in both tetravalent and hexavalent oxidation states and is structurally related to the U3O8 polymorphs, which are commonly encountered technogenic materials in the nuclear fuel cycle. Despite the similarities between U3O8 and ianthinite, and the importance of ianthinite in U paragenesis, no R…

Sep, 2025

Journal

Raman Spectroscopic Investigation of UCl4

Uranium chloride salts are a proposed fuel source for molten salt reactors (MSRs). However, despite their relevance to nuclear energy, they remain understudied, in part because of their air and moisture sensitivity. This work provides the first Raman spectra of UCl4 from 45 to 3200 cm−1 collected with 532 and 785 nm excitation sources as well as the assignment of 10 identi…

Aug, 2025

Journal

A systematic exploration of the hydrolysis products of the uranium trioxide polymorphs and their optical vibrational spectra

Study of the uranium trioxide (UO3)-water system is complex with inconclusive results and limited details in the literature. The UO3 system is home to at least seven structural polymorphs and an amorphous phase. The proposed hydrolysis products of UO3 are just as numerous, yet investigations of these alteration products are sporadic and generally antiquated, thus requiring…

Jul, 2025

Journal

Understanding the Hydronium Cation in the Solid State: A Study in Synthetic Hydronium Uranyl Phosphate and Arsenate Mineral Systems and Their Irradiation Stability

We present neutron diffraction, electronic structure calculations, and optical vibrational spectroscopic characterization of hydronium uranyl phosphate (HUP), the synthetic analog of chernikovite ((H3O)(UO2)(PO4)·3H2O) to gain insight into structural features of the hydronium cation in the solid state. HUP crystallizes in P21/c instead of previously reported P4/ncc1 at roo…