AFCI Glovebox Radiological Release - Evaluation, Corrective Actions and Testing

Borschel, G. H.; Lounsbury, M. W.; lopez, juan; Burke, L. L.; Casé, Rossi; johnston, jonathan; Cannon, J; Wilson, Borland, Mark

doi:10.2172/1482996

Cited by 1 publication

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The selection of starting materials for the synthesis of complex transuranium chalcogenides has been mostly limited to the use of metals and, to a significantly lesser extent, binary chalcogenide reagents. ,, Both are technically and synthetically challenging due to the ubiquitous presence of surface oxygen that can lead to the formation of oxychalcogenide and/or even oxide impurities. − This issue is exacerbated by the fact that most radioactive material gloveboxes operate at negative pressures to contain highly radioactive materials, albeit at the expense of atmosphere inertness. − Oxygen and moisture readily react with actinide metals and their chalcogenides, throwing off stoichiometries of the reactions and introducing impurity products that impact the measurement of the physical properties of the target phases. To avoid this issue, new synthetic techniques that uses air-stable non-hygroscopic starting materials, such as actinide oxides, are desirable.…”

Section: Introductionmentioning

confidence: 99%

Transuranium Sulfide via the Boron Chalcogen Mixture Method and Reversible Water Uptake in the NaCuTS₃ Family

et al. 2022

View full text Add to dashboard Cite

The behavior of 5f electrons in soft ligand environments makes actinides, and especially transuranium chalcogenides, an intriguing class of materials for fundamental studies. Due to the affinity of actinides for oxygen, however, it is a challenge to synthesize actinide chalcogenides using non-metallic reagents. Using the boron chalcogen mixture method, we achieved the synthesis of the transuranium sulfide NaCuNpS3 starting from the oxide reagent, NpO2. Via the same synthetic route, the isostructural composition of NaCuUS3 was synthesized and the material contrasted with NaCuNpS3. Single crystals of the U-analogue, NaCuUS3, were found to undergo an unexpected reversible hydration process to form NaCuUS3·xH2O (x ≈ 1.5). A large combination of techniques was used to fully characterize the structure, hydration process, and electronic structures, specifically a combination of single crystal, powder, high temperature powder X-ray diffraction, extended X-ray absorption fine structure, infrared, and inductively coupled plasma spectroscopies, thermogravimetric analysis, and density functional theory calculations. The outcome of these analyses enabled us to determine the composition of NaCuUS3·xH2O and obtain a structural model that demonstrated the retention of the local structure within the [CuUS3]− layers throughout the hydration–dehydration process. Band structure, density of states, and Bader charge calculations for NaCuUS3, NaCuUS3·xH2O, and NaCuNpS3 along with X-ray absorption near edge structure, UV–vis–NIR, and work function measurements on ACuUS3 (A = Na, K, and Rb) and NaCuUS3·xH2O samples were carried out to demonstrate that electronic properties arise from the [CuTS3]− layers and show surprisingly little dependence on the interlayer distance.

show abstract

Section: Introductionmentioning

confidence: 99%

Transuranium Sulfide via the Boron Chalcogen Mixture Method and Reversible Water Uptake in the NaCuTS₃ Family

et al. 2022

View full text Add to dashboard Cite

show abstract

AFCI Glovebox Radiological Release - Evaluation, Corrective Actions and Testing

Cited by 1 publication

References 0 publications

Transuranium Sulfide via the Boron Chalcogen Mixture Method and Reversible Water Uptake in the NaCuTS₃ Family

Transuranium Sulfide via the Boron Chalcogen Mixture Method and Reversible Water Uptake in the NaCuTS₃ Family

Contact Info

Product

Resources

About

AFCI Glovebox Radiological Release - Evaluation, Corrective Actions and Testing

Cited by 1 publication

References 0 publications

Transuranium Sulfide via the Boron Chalcogen Mixture Method and Reversible Water Uptake in the NaCuTS3 Family

Transuranium Sulfide via the Boron Chalcogen Mixture Method and Reversible Water Uptake in the NaCuTS3 Family

Contact Info

Product

Resources

About

Transuranium Sulfide via the Boron Chalcogen Mixture Method and Reversible Water Uptake in the NaCuTS₃ Family

Transuranium Sulfide via the Boron Chalcogen Mixture Method and Reversible Water Uptake in the NaCuTS₃ Family