Nuclides with atomic number of 26 but with different mass numbers
Isotopes of iron (26Fe)
Main isotopes[1]
Decay
abundance
half-life (t1/2)
mode
product
54Fe
5.85%
stable
55Fe
synth
2.73 y
ε
55Mn
56Fe
91.8%
stable
57Fe
2.12%
stable
58Fe
0.28%
stable
59Fe
synth
44.6 d
β−
59Co
60Fe
trace
2.6×106 y
β−
60Co
Standard atomic weight Ar°(Fe)
55.845±0.002[2]
55.845±0.002 (abridged)[3]
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Naturally occurring iron (26Fe) consists of four stable isotopes: 5.845% of 54Fe (possibly radioactive with a half-life over 4.4×1020 years),[4] 91.754% of 56Fe, 2.119% of 57Fe and 0.286% of 58Fe. There are 24 known radioactive isotopes, the most stable of which are 60Fe (half-life 2.6 million years) and 55Fe (half-life 2.7 years).
Much of the past work on measuring the isotopic composition of iron has centered on determining 60Fe variations due to processes accompanying nucleosynthesis (i.e., meteorite studies) and ore formation. 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. 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.[5]
^Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae.
^"Standard Atomic Weights: Iron". CIAAW. 1993.
^Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; Böhlke, John K.; Chesson, Lesley A.; Coplen, Tyler B.; Ding, Tiping; Dunn, Philip J. H.; Gröning, Manfred; Holden, Norman E.; Meijer, Harro A. J. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)". Pure and Applied Chemistry. doi:10.1515/pac-2019-0603. ISSN 1365-3075.
^Bikit, I.; Krmar, M.; Slivka, J.; Vesković, M.; Čonkić, Lj.; Aničin, I. (1998). "New results on the double β decay of iron". Physical Review C. 58 (4): 2566–2567. Bibcode:1998PhRvC..58.2566B. doi:10.1103/PhysRevC.58.2566.
^N. Dauphas; O. Rouxel (2006). "Mass spectrometry and natural variations of iron isotopes". Mass Spectrometry Reviews. 25 (4): 515–550. Bibcode:2006MSRv...25..515D. doi:10.1002/mas.20078. PMID 16463281.
iron (26Fe) consists of four stable isotopes: 5.845% of 54Fe (possibly radioactive with a half-life over 4.4×1020 years), 91.754% of 56Fe, 2.119% of 57Fe...
decay. The main decay products before 59Co are ironisotopes and the main products after are nickel isotopes. Radioisotopes can be produced by various nuclear...
materials. Iron has four stable isotopes: 54Fe (5.845% of natural iron), 56Fe (91.754%), 57Fe (2.119%) and 58Fe (0.282%). Twenty-four artificial isotopes have...
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11 have 5 stable isotopes, 9 have 4 stable isotopes, 5 have 3 stable isotopes, 16 have 2 stable isotopes, and 26 have 1 stable isotope. Additionally, about...
Naturally occurring nickel (28Ni) is composed of five stable isotopes; 58 Ni , 60 Ni , 61 Ni , 62 Ni and 64 Ni , with 58 Ni being the most abundant (68...
elements, they are usually termed stable isotopes. The 80 elements with one or more stable isotopes comprise a total of 251 nuclides that have not been known...
years, 54Mn with a half-life of 312.3 days, and 52Mn with a half-life of 5.591 days. All of the remaining radioactive isotopes have half-lives that are less...
are palladium (element 46) isotopes and the primary products after are cadmium (element 48) isotopes. The palladium isotope 107Pd decays by beta emission...
more specific atoms with their isotopes. The reactant is then allowed to undergo the reaction. The position of the isotopes in the products is measured to...
isotope. Except for the isotopesof hydrogen (which differ greatly from each other in relative mass—enough to cause chemical effects), the isotopes of...
75(6) ms. All of the remaining isotopesof lithium have half-lives that are shorter than 10 nanoseconds. The shortest-lived known isotopeof lithium is 4Li...
Stable ironisotopes are described as the relative abundance of each of the stable isotopes with respect to 54Fe. The standard for iron is elemental iron, IRMM-014...
this enhancement of the heavier isotope. The chromium isotope ratio in banded iron formation suggests small but significant quantities of oxygen in the atmosphere...
Natural palladium (46Pd) is composed of six stable isotopes, 102Pd, 104Pd, 105Pd, 106Pd, 108Pd, and 110Pd, although 102Pd and 110Pd are theoretically unstable...
objects fuse into iron-56 nuclei (see isotopesofiron). Fission and alpha particle emission should make heavy nuclei also decay to iron, leaving stellar-mass...
naturally occurring isotopes, five of which are stable: 187Os, 188Os, 189Os, 190Os, and (most abundant) 192Os. The other natural isotopes, 184Os, and 186Os...
deposits, especially isotopesofiron, from when the mantle developed 4.5 billion years ago. In 2023 JOIDES Resolution recovered cores of what appeared to...
of an element, weighted by the abundance of the isotopes. The dimensionless (standard) atomic weight is the weighted mean relative isotopic mass of a...
stable isotopes usually refers to isotopesof the same element. The relative abundance of such stable isotopes can be measured experimentally (isotope analysis)...
Nic J.; Roden, Eric E. (January 2008). "Ironisotopes constrain biologic and abiologic processes in banded iron formation genesis". Geochimica et Cosmochimica...
Isotope analysis is the identification ofisotopic signature, abundance of certain stable isotopesof chemical elements within organic and inorganic compounds...
Iron ores are rocks and minerals from which metallic iron can be economically extracted. The ores are usually rich in iron oxides and vary in color from...
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