Allotropes are different forms of the same element with distinct physical or chemical properties; Isotopes are atoms of the same element with differing numbers of neutrons.
The primary difficulty associated with the production of pure rubidium is that it is always found together with cesium in nature and is also mixed with other alkali metals. Because these elements are very similar chemically, their separation presented numerous problems before the advent of ion-exchan...
CV chondrite matrix material is chemically and isotopically similar to some coarse-grained chondrule rims. Previous work showed that O-isotope data for CV barred olivine (BO) chondrules plot just below the terrestrial fractionation (TF) line, near δ 18O ⋍ 4‰, well off the CCAM line. ...
(2016) reported that radioactive iodine (125I) was efficiently absorbed by chemically synthesized gold nanoparticles (AuNPs) embedded desalting column under various aqueous media. Among the various radioisotopes of iodine, 125I was preferred as a target radioelement because of its moderately low ...
In most circumstances, an element would be considered efficiently excluded from some sample if its abundance, relative to cosmic proportions to some convenient reference element, were depleted by “several” orders of magnitude. But a noble gas would be considered to be present in quite high ...
Moreover, spectrophotometric, fluorescence, NMR and Raman analyses of several f-block element–POM complexes, including 243Am3+ and 248Cm3+, showed otherwise unnoticeable differences between their solution versus solid-state chemistry, and actinide versus lanthanide behaviour. This POM-driven strategy ...
ISO SEPARATION OF ISOTOPES AND THERMAL DIFFUSION* By PROF. JAMES KENDALL, F.R.S. University of Edinburgh THE fact that the same element may exist in two or more forms, which are chemically identical even though their atomic weights differ, was first noted by Soddy (1910) in connexion with...
Keywords: Cu isotope of lower continental crust, Cu mobilization, Metasomatism, Fluid interaction, Partial melting 1. Introduction Cu is a chalcophile element that exists widely in the mantle and crust. The Cu budget within the mantle is relatively homogeneous, typically 30 ± 6 ppm in the prim...
distinct mantle components. As a consequence of these trace element variations, we now have the unique opportunity to test for potential coupling of δ18O values to various mantle components and to assess hypotheses relating to the oxygen isotope composition of the mantle underlying the Reykjanes ...
chemically-enriched domains of the sub-continental lithospheric mantle can therefore be an important source of apparently ‘crustal’ signatures in mantle-derived magmas. Similar content being viewed by others Diverse mantle components with invariant oxygen isotopes in the 2021 Fagradalsfjall eruption, ...