Theoretical and experimental investigation of nickel isotopic fractionation in species relevant to modern and ancient oceans

Fujii, Toshiyuki; Moynier, Frédéric; Dauphas, N.; Abe, Masahide

doi:10.1016/j.gca.2010.11.003

Cited by 66 publications

(59 citation statements)

References 103 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In contrast, isotopic fractionations between Ni species relevant for the hydrological cycle have received more extensive, theoretical investigation (Fujii et al 2011;Fujii et al 2014). Despite p13 the absence of redox changes at the Earth's surface, differences in the bonding environment between common, aqueous Ni species result in significant isotopic fractionations (Fig.…”

Section: Ni Isotope Fractionation During Weathering and The Hydrologimentioning

confidence: 99%

“…Kinetic fractionation in metabolic pathways will favour the least strongly bound, lightest isotopes and given this basic notion it might be anticipated that Ni incorporated into biological systems would have low δ 60/58 Ni. On the other hand, the first 720 principles calculations (Fujii et al, 2011;Fujii et al, 2014) show substantial equilibrium fractionation of Ni isotopes between aqueous species complexed with different naturally occurring organic ligands (Fig. 9).…”

mentioning

confidence: 96%

“…Most recently, however, measurements of isotopically heavy Ni (δ 60/58 Ni ~2) in euxinic deep waters of the Black Sea (Vance et al, in review) appear to be the complement to partial removal to the sediment pile of a sorped, Ni sulfide species, which Fujii et al (2011) predicted to be isotopically light (Fig. 9).…”

mentioning

confidence: 99%

See 2 more Smart Citations

The Isotope Geochemistry of Ni

Elliott

Steele

2017

Reviews in Mineralogy and Geochemistry

View full text Add to dashboard Cite

Section: Ni Isotope Fractionation During Weathering and The Hydrologimentioning

confidence: 99%

mentioning

confidence: 96%

See 1 more Smart Citation

The Isotope Geochemistry of Ni

Elliott

Steele

2017

Reviews in Mineralogy and Geochemistry

View full text Add to dashboard Cite

“…Anomalous light isotope enrichments of U(IV), U(VI), Pb(II) and Tl(I) relative to U(III), U(IV), Pb 0 and Tl 0 were found (Schauble 2007;Abe et al 2008aAbe et al , b, 2010Fujii et al 2011aFujii et al , 2013Yang and Liu 2015). In addition, zinc (Fujii et al 2009c and nickel isotopes (Fujii et al 2011b) were studied both experimentally and theoretically. However, the NFSE was found to be much smaller than the conventional mass-dependent effects for their cases.…”

Section: Nfse In Gaseous and Small Liquid Speciesmentioning

confidence: 98%

Nuclear field shift effects on stable isotope fractionation: a review

Yang

Liu

2016

Acta Geochim

View full text Add to dashboard Cite

An anomalous isotope effect exists in many heavy element isotope systems (e.g., Sr, Gd, Zn, U). This effect used to be called the ''odd-even isotope effect'' because the odd mass number isotopes behave differently from the even mass number isotopes. This mass-independent isotope fractionation driving force, which originates from the difference in the ground-state electronic energies caused by differences in nuclear size and shape, is currently denoted as the nuclear field shift effect (NFSE). It is found that the NFSE can drive isotope fractionation of some heavy elements (e.g., Hg, Tl, U) to an astonishing degree, far more than the magnitude caused by the conventional mass-dependent effect (MDE). For light elements, the MDE is the dominant factor in isotope fractionation, while the NFSE is neglectable. Furthermore, the MDE and the NFSE both decrease as temperatures increase, though at different rates. The MDE decreases rapidly with a factor of 1/T 2 , while the NFSE decreases slowly with a factor of 1/T. As a result, even at high temperatures, the NFSE is still significant for many heavy element isotope systems. In this review paper, we begin with an introduction of the basic concept of the NSFE, including its history and recent progress, and follow with the potential implications of the inclusion of the NFSE into the kinetic isotope fractionation effect (KIE) and heavy isotope geochronology.Keywords Isotope fractionation Á Mass-dependent effect Á Nuclear field shift effect Á Mass-independent fractionation Á Nuclear volume effect Á Nuclear shape effect

show abstract

“…Now theoretical calculation of nuclear volume term is widely applied to various isotopes [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Theoretical Study of Isotope Enrichment Caused by Nuclear Volume Effect

Abe

Hada

Suzuki

et al. 2014

J. Comput. Chem. Jpn.

Self Cite

View full text Add to dashboard Cite

Isotope separation is important in industry, such as uranium enrichment. It is also very important in geochemistry and cosmo-chemistry because heavy and light isotopes are gradually fractionated in global equilibrium processes. For isotopes of heavy elements such as uranium and gadolinium, this fractionation occurs mainly owing to the difference of nuclear charge radii between the isotopes. This is because electronic states of isotopologues are different because of the difference of nuclear charge radii. Nuclear volume terms (lnKnv) in the equilibrium constants of isotope fractionations can be calculated from the electronic energy difference of isotopologues, obtained by relativistic quantum chemical calculations with finite-size nuclear models. In this review, we summarize our theoretical results in uranium isotope separations, using U (III)-U (IV) and U (IV)-U (VI) redox reaction systems. Calculated nuclear volume term (lnKnv) is reasonably close to the ones estimated from experimental analysis of temperature dependence in equilibrium constants.We used the four-component Dirac-Coulomb Hartree-Fock method with the Fermi and Gaussian-type nuclear models in our calculations. We also briefly mention how the nuclear volume effect is important in geochemistry or cosmochemistry referring to recent relevant works.

show abstract

Theoretical and experimental investigation of nickel isotopic fractionation in species relevant to modern and ancient oceans

Cited by 66 publications

References 103 publications

The Isotope Geochemistry of Ni

The Isotope Geochemistry of Ni

Nuclear field shift effects on stable isotope fractionation: a review

Theoretical Study of Isotope Enrichment Caused by Nuclear Volume Effect

Contact Info

Product

Resources

About