Thorium and Thorium Compounds

Clark, David L.; Keogh, D. Ww; Neu, Mary P.; Runde, Wolfgang

doi:10.1002/0471238961.2008151803120118.a01

Cited by 4 publications

(1 citation statement)

References 53 publications

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“…The chemical and physical properties of the heaviest elements, actinides − (and transactinides), are very actively researched for a number of reasons. First, these elements are fascinating due to the involvement of 5f orbitals in new and unusual bonding scenarios. − Second, there are promising potential applications of 5f elements, for example in single-molecule magnets (SMMs) .…”

Section: Introductionmentioning

confidence: 99%

Magnetic Resonance Properties of Actinyl Carbonate Complexes and Plutonyl(VI)-tris-nitrate

et al. 2014

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Electronic structures and magnetic properties of actinyl ions AnO2(n+) (An = U, Np, and Pu) and the equatorially coordinated carbonate complexes [UO2(CO3)3](5–), [NpO2(CO3)3](4–), and [PuO2(CO3)3](4–) are investigated by ab initio quantum chemical calculations. The complex [PuO2(NO3)3](−) is also included because of experimentally available g-factors and for comparison with a previous study of [NpO2(NO3)3](−) (Chem.—Eur. J. 2014, 20, 7994-8011). The results are rationalized with the help of crystal-field (CF)-type models with parameters extracted from the ab initio calculations, and with the help of natural orbitals and natural spin orbitals contributing to the magnetic properties and the unpaired spin distribution, generated from the spin–orbit wave functions. These orbitals resemble textbooklike representations of the actinide 5f orbitals. Calculated paramagnetic susceptibilities are used to estimate dipolar 13C chemical shifts for the carbonate ligands. Their signs and order of magnitude are compared to paramagnetic effects observed experimentally in NMR spectra. The results indicate that the experimental spectra are also influenced by contact shifts.

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Section: Introductionmentioning

confidence: 99%

Magnetic Resonance Properties of Actinyl Carbonate Complexes and Plutonyl(VI)-tris-nitrate

et al. 2014

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By-product metals are technologically essential but have problematic supply

2015

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The criticality of metals: a perspective for geologists

Graedel

Nassar

2013

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The criticality of metals (the quality, state, or degree of being of the highest importance) is of increasing concern as populations and wealth increase and as mineral extraction follows. Many characteristics are involved in determining criticality, and those involving geology are among the most important. We discuss the state of knowledge of mineable resources across the periodic table, and how those determinations factor into criticality evaluations. We then illustrate criticality evaluations of the copper ore group elements for the specific example of the UK. Given the importance of the ore metals over the long term, we argue that efforts on the part of the geological community to update and maintain criticality-related information deserve much more attention than they are now receiving.

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Thorium and Thorium Compounds

Cited by 4 publications

References 53 publications

Magnetic Resonance Properties of Actinyl Carbonate Complexes and Plutonyl(VI)-tris-nitrate

Magnetic Resonance Properties of Actinyl Carbonate Complexes and Plutonyl(VI)-tris-nitrate

By-product metals are technologically essential but have problematic supply

The criticality of metals: a perspective for geologists

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