Precipitation of Uranium Tetrafluoride from Aqueous Solutions by Catalytic Reduction

Allen, R.J.; Petrow, H.G.; Magno, P.J.

doi:10.1021/ie50588a029

Cited by 11 publications

(2 citation statements)

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“…These isotopes were furnished as oxides and we have had to prepare other chemical compounds by synthesis from these stock materials. For example, we have prepared UF 4 from UO 2 by aqueous synthesis [6,7]. This synthesis leaves us with a hydrated form of UF 4 that we heat under vacuum to remove the excess water.…”

Section: Isotopic Purity and Uniformitymentioning

confidence: 99%

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High quality actinide targets

Loveland

2015

J Radioanal Nucl Chem

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We prepare high quality actinide targets for studies of neutron-induced and charged-particle-induced fission. I report on our efforts to measure fragment energy loss in the target backings and to diagnose the ''crud'' problem frequently found in 248 Cm and 252 Cf sources and targets. I discuss the preparation of multi-isotopic targets for the FissionTPC and our efforts to measure the pointing resolution of this device. The issues of target uniformity, chemical composition and radiation stability of the targets are discussed along with problems of high/low specific activity regions in a single target.

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Section: Isotopic Purity and Uniformitymentioning

confidence: 99%

Section: Isotopic Purity and Uniformitymentioning

confidence: 99%

High quality actinide targets

Loveland

2015

J Radioanal Nucl Chem

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UF₄ and the High‐Pressure Polymorph HP‐UF₄

Scheibe

Bruns

Heymann

et al. 2019

Chemistry A European J

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A laboratory‐scale synthesis of UF4 is presented that utilizes the reduction of UF6 with sulfur in anhydrous hydrogen fluoride. An excess of sulfur can be removed by vacuum sublimation, yielding pure UF4, as shown by powder X‐ray diffraction, micro X‐ray fluorescence analysis, infrared and Raman spectroscopy, as well as magnetic measurements. Furthermore, a single‐crystalline, high‐pressure modification of UF4 was obtained in a multi‐anvil press at elevated temperatures. The high‐pressure polymorph HP‐UF4 was characterized by means of single‐crystal and powder X‐ray diffraction, as well as by magnetic measurements, and presents a novel crystal structure type. Quantum‐chemical calculations show the HP‐modification to be 10 kJ mol−1 per formula unit higher in energy compared to UF4.

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