carried out on a metallic iron sample of high purity. Of the stable isotopes, only 57Fe has a nuclear spin (1/2). Spins with weak assignment arguments are enclosed in parentheses. two reported mass-spectrometric determinations. 1997-2022 LUMITOS AG, All rights reserved, https://www.chemeurope.com/en/encyclopedia/Isotopes_of_iron.html, Your browser is not current. Nielsen, "The Radiochemistry of Iron", National Academy of Sciences--National Research Council, 1960.

x][o:~7cE $2YLsbN$=v,"? The abundance of 60Ni present in extraterrestrial material may also provide further insight into the origin of the solar system and its early history. '?w?&?mpW&o>x3IM>|f$$O'n"Uy_WIiI)0/@tZ=4Z9K()a O@'$W((ER-o-ixNy 3 0 obj Studies have included iron-loss by human adolescents, conditions for effective iron absorption, interventions for anemia and genetic iron control. Review 2000 (IUPAC Technical Report). Values marked # are not purely derived from experimental data, but at least partly from systematic trends. prehistoric times. 1 0 obj All rights reserved. Audi, Bersillon, Blachot, Wapstra. <> !a`)qIZN*F>a#,qwo5Q?xC Q s`_!T)o]#"ALJ1ovy9a 4 0 obj It is, therefore, the ultimate endproduct Editing notes on this article's talk page. With an accout for my.chemeurope.com you can always see everything at a glance and you can configure your own website and individual newsletter. Isotopic compositions and standard atomic masses from Atomic weights of the elements. <>/Font<>/XObject<>/Pattern<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 553.2 733.2] /Contents 5 0 R/Group<>/Tabs/S/StructParents 0>> Ar(Fe) = 55.845(2) since 1993 However, since 56Fe is much more easily produced from lighter nuclei in nuclear reactions, it is the endpoint of fusion chains inside extremely massive stars and is therefore common in the universe, relative to other metals. endobj Standard atomic mass: 55.845(2) u, J.M. endobj The Fe-54 isotope is used for the production of radioactive Fe-55 which in turn is used as an electron capture detector and in X-ray fluorescence. Find out how LUMITOS supports you with online marketing. National Nuclear Data Center, Brookhaven National Laboratory. WebElements: THE periodic table on the WWW [www.webelements.com] the uncertainty assigned to the atomic-weight value was based mainly on the reported variations of Fe isotopic The magnitude of It is of interest % endobj Iron isotopes are mainly used in nutritional studies, with Fe-57 and Fe-58 being the two most commonly used Fe isotopes. Find out more about the company LUMITOS and our team. of stellar nuclear fusion. Isotope masses from Ame2003 Atomic Mass Evaluation by G. Audi, A.H. Wapstra, C. Thibault, J. Blachot and O. Bersillon in. Naturally occurring Iron (Fe) consists of four isotopes: 5.845% of radioactive 54Fe (half-life: >3.11022 years), 91.754% of stable 56Fe, 2.119% of stable 57Fe and 0.282% of stable 58Fe. }7s_0>90Xv7;u} k:/zKj_/;Zdy\|_/|gn7-)wAvT+@PB-B;wC ~Cw4 S#7hrLcK32OlF*D9qs5#d%HpVn\\s *xoaV(9jf?l|7W7 &@1jD)]"OtJ,wvc|9\'A[amS|k#$*O>G{< ofj1vpW#~A>$ }$['h[Z^D$9g9N(SM=:{TssZN. \ z In 1993, the Commission changed the recommended Fe-56 can be used for the production of radioactive Co-55 which is used as a tumor seeking agent in bleomycin. 2 0 obj 3-128 (2003). The element has been known from 2.9 with Ar(Fe) = 55.8448 in human blood to +1.36 with In phases of the meteorites Semarkona and Chervony Kut a correlation between the concentration of 60Ni, the daughter product of 60Fe, and the abundance of the stable iron isotopes could be found which is evidence for the existence of 60Fe at the time of formation of the solar system. Iron To use all the functions on Chemie.DE please activate JavaScript. Uncertainty values denote one standard deviation, except isotopic composition and standard atomic mass from IUPAC which use expanded uncertainties. <> Microsoft Internet Explorer 6.0 does not support some functions on Chemie.DE.

value for the standard atomic weight to Ar(Fe) = 55.845(2) based on calibrated mass-spectrometric measurements composition; however, subsequent studies now indicate somewhat different ranges. This is not true, as both 62Ni and 58Fe are more stable, being the most stable nuclei. Several studies have indicated natural isotope fractionation in iron-containing materials. The symbol Fe is derived from the Latin ferrum for "firmness". A 729, pp. to note that 56Fe requires more energy to be formed than any other nuclide. Much of the past work on measuring the isotopic composition of Fe has centered on determining 60Fe variations due to processes accompanying nucleosynthesis (i.e., meteorite studies) and ore formation. Ar(Fe) = 55.8453 in part of a banded iron formation. Possibly the energy released by the decay of 60Fe contributed, together with the energy released by decay of the radionuclide 26Al, to the remelting and differentiation of asteroids after their formation 4.6 billion years ago. ", CRC Handbook of Chemistry and Physics 1999-2000 : A Ready-Reference Book of Chemical and Physical Data (CRC Handbook of Chemistry and Physics, Naturally occurring isotope abundances: Commission on Atomic Weights and Isotopic Abundances report for the International Union of Pure and Applied Chemistry in, For further information about radioisotopes see Jonghwa Chang's (Korea Atomic Energy Research Institute), Masses, nuclear spins, and magnetic moments: I. The isotope 56Fe is of particular interest to nuclear scientists. You can reference the WebElements periodic table as follows:"WebElements, https://www.webelements.com, accessed July 2022. Your browser does not support JavaScript. In the last decade however, advances in mass spectrometry technology have allowed the detection and quantification of minute, naturally-occurring variations in the ratios of the stable isotopes of iron. Copyright 1993-2022 Mark Winter [ The University of Sheffield and WebElements Ltd, UK]. To use all functions of this page, please activate cookies in your browser. 1qySvg9x^=+H 6"pBX- ^:]T \dDNS GSqj Uf^V>33@D[jgLq1#@i}9*/Ejh? hv]w^iZ*70G. The Nubase2003 evaluation of nuclear and decay properties, Nuc. The name derives from the Anglo-Saxon iron of unknown origin. <> Half-life, spin, and isomer data selected from these sources. endobj <>>> Read what you need to know about our industry portal chemeurope.com. Phys. 60Fe is an extinct radionuclide of long half-life (1.5 million years). %PDF-1.5 According to the compilation by the Commission, reported 56Fe values range from Here 56Fe Much of this work has been driven by the Earth and planetary science communities, although applications to biological and industrial systems are beginning to emerge.[1]. Atomic weights of the elements: Review 2000. Mills, T. Cvitas, K. Homann, N. Kallay, and K. Kuchitsu in. stream 5 0 obj In 1961, the Commission recommended Ar(Fe) = 55.847(3) based on the average value of

Uncertainties are given in concise form in parentheses after the corresponding last digits. A common misconception is that this isotope represents the most stable nucleus possible, and that it thus would be impossible to perform fission or fusion on 56Fe and still liberate energy. yw=&dSdVo0vu.m^BIu%=]2S:esn?. Information extracted from the NuDat 2.1 database (retrieved Sept. 2005). refers to n(56Fe)/n(54Fe) relative to the reference material IRMM-014.