In chemistry and physics, the iron group refers to elements that are in some way related to iron; mostly in period (row) 4 of the periodic table. The term has different meanings in different contexts.
In chemistry, the term is largely obsolete, but it often means iron, cobalt, and nickel, also called the iron triad;[1]. It may sometimes refer to other elements that resemble iron in some chemical aspects, such as the stable group 8 elements (Fe, Ru, Os).[2][3]
In astrophysics and nuclear physics, the term is still quite common, and it typically means those three plus chromium and manganese—five elements that are exceptionally abundant, both on Earth and elsewhere in the universe, compared to their neighbors in the periodic table. Titanium and vanadium are also produced in Type Ia supernovae.[4]
- ^ M. Green, ed. (2002): Organometallic Chemistry, volume 10, page 283. Royal Society of Chemistry; 430 pages, ISBN 9780854043330
- ^ Collman, James P.; McDevitt, John T.; Yee, Gordon T.; Leidner, Charles R.; McCullough, Laughlin G.; Little, William A.; Torrance, Jerry B. (1986). "Conductive polymers derived from iron, ruthenium, and osmium metalloporphyrins: The shish-kebab approach". Proceedings of the National Academy of Sciences. 83 (13): 4581–4585. Bibcode:1986PNAS...83.4581C. doi:10.1073/pnas.83.13.4581. PMC 323784. PMID 16593717.
- ^ Geoffroy, Gregory L.; Gladfelter, Wayne L. (1977). "Synthesis of tetrahedral mixed-metal clusters of the iron triad. Preparation and characterization of tridecacarbonyldihydroironosmiumdiruthenium and tridecacarbonyldihydroirondiosmiumruthenium". Journal of the American Chemical Society. 99 (23): 7565–7573. Bibcode:1977JAChS..99.7565G. doi:10.1021/ja00465a027.
- ^ Bravo, E. (2013). "Insights into thermonuclear supernovae from the incomplete Si-burning process". Astronomy & Astrophysics. 550: A24. arXiv:1212.2410. Bibcode:2013A&A...550A..24B. doi:10.1051/0004-6361/201220309. hdl:2117/17442. S2CID 49331289.