Nuclear volume effects in equilibrium stable isotope fractionations of mercury, thallium and lead

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	Nuclear volume effects in equilibrium stable isotope fractionations of mercury, thallium and lead
	Sha Yang; Yun Liu
刊名	Scientific Reports
	2015
期号	1 页码:1-12
英文摘要	The nuclear volume effects (NVEs) of Hg, Tl and Pb isotope systems are investigated with careful evaluation on quantum relativistic effects via the Dirac’s formalism of full-electron wave function. Equilibrium Hg/Hg, Tl/Tl, Pb/Pb and Pb/Pb isotope fractionations are found can be up to 3.61‰, 2.54‰, 1.48‰ and 3.72‰ at room temperature, respectively, larger than fractionations predicted by classical mass-dependent isotope fractionations theory. Moreover, the NVE can cause mass-independent fractionations (MIF) for odd-mass isotopes and even-mass isotopes. The plot of vs. for Hg-bearing species falls into a straight line with the slope of 1.66, which is close to previous experimental results. For the first time, Pb-bearing species are found can enrich heavier Pb isotopes than Pb-bearing species to a surprising extent, e.g., the enrichment can be up to 4.34‰ in terms of Pb/Pb at room temperature, due to their NVEs are in opposite directions. In contrast, fractionations among Pb-bearing species are trivial. Therefore, the large Pb fractionation changes provide a potential new tracer for redox conditions in young and closed geologic systems. The magnitudes of NVE-driven even-mass MIFs of Pb isotopes (i.e., ) and odd-mass MIFs (i.e., ) are almost the same but with opposite signs.
语种	英语
公开日期	2017-05-17
内容类型	期刊论文
源URL	[http://ir.gyig.ac.cn:8080/handle/352002/6046]
专题	地球化学研究所_矿床地球化学国家重点实验室_矿床地球化学国家重点实验室_期刊论文
推荐引用方式 GB/T 7714	Sha Yang,Yun Liu. Nuclear volume effects in equilibrium stable isotope fractionations of mercury, thallium and lead[J]. Scientific Reports,2015(1):1-12.
APA	Sha Yang,&Yun Liu.(2015).Nuclear volume effects in equilibrium stable isotope fractionations of mercury, thallium and lead.Scientific Reports(1),1-12.
MLA	Sha Yang,et al."Nuclear volume effects in equilibrium stable isotope fractionations of mercury, thallium and lead".Scientific Reports .1(2015):1-12.